MAXIM MAX3301E, MAX3302E User Manual

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General Description

The MAX3301E/MAX3302E fully integrated USB On-the­Go (OTG) transceivers and charge pumps allow mobile
devices such as PDAs, cellular phones, and digital
cameras to interface directly with USB peripherals and
each other without the need of a host PC. Use the
MAX3301E/MAX3302E with an embedded USB host to
directly connect to peripherals such as printers or
external hard drives.

The MAX3301E/MAX3302E integrate a USB OTG trans­ceiver, a V

BUS

charge pump, a linear regulator, and an

I

2

C-compatible, 2-wire serial interface. An internal level
shifter allows the MAX3301E/MAX3302E to interface
with +1.65V to +3.6V logic supply voltages. The
MAX3301E/MAX3302E’s OTG-compliant charge pump
operates with +3V to +4.5V input supply voltages, and
supplies an OTG-compatible output on V

BUS

while

sourcing more than 8mA of output current.
The MAX3301E/MAX3302E enable USB OTG communi-

cation from highly integrated digital devices that cannot
supply or tolerate the +5V V

BUS

levels that USB OTG
requires. The device supports USB OTG session-request
protocol (SRP) and host-negotiation protocol (HNP).

The MAX3301E/MAX3302E provide built-in ±15kV elec­trostatic-discharge (ESD) protection for the V

BUS

, ID_IN,
D+, and D- terminals. The MAX3301E/MAX3302E are
available in 25-bump chip-scale (UCSP™), 28-pin TQFN,
and 32-pin TQFN packages and operate over the
extended -40°C to +85°C temperature range.

Applications

Mobile Phones Digital Cameras
PDAs MP3 Players

Features

♦ USB 2.0-Compliant Full-/Low-Speed OTG

Transceivers

♦ Ideal for USB On-the-Go, Embedded Host, or

Peripheral Devices

♦ ±15kV ESD Protection on ID_IN, V

BUS

, D+, and D-

Terminals

♦ Charge Pump for V

BUS

Signaling and Operation

Down to 3V

♦ Internal V

BUS

and ID Comparators

♦ Internal Switchable Pullup and Pulldown

Resistors for Host/Peripheral Functionality

♦ I2C Bus Interface with Command and Status

Registers

♦ Linear Regulator Powers Internal Circuitry and

D+/D- Pullup Resistors

♦ Support SRP and HNP

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3275; Rev 2; 1/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART

PACKAGE

SIZE

(mm)

PIN­PACKAGE

PKG

CODE

MAX3301EEBA-T

2.5 x 2.5 25 UCSP

‡

B25-1

MAX3301EETJ 5 x 5

T3255-4

MAX3302EEBA-T*

2.5 x 2.5 25 UCSP

‡

B25-1

MAX3302EETI 4 x 4

T2844-1

Purchase of I2C components from Maxim Integrated Products,
Inc. or one of its sublicensed Associated Companies, conveys a
license under the Philips I2C Patent Rights to use these compo­nents in an I2C system, provided that the system conforms to the
I2C Standard Specification as defined by Philips.
UCSP is a trademark of Maxim Integrated Products, Inc.

Note: All devices specified over the -40°C to +85°C operating
range.

‡

UCSP bumps are in a 5 x 5 array. The UCSP package size is

2.5mm x 2.5mm x 0.62mm. Requires solder temperature profile
described in the Absolute Maximum Ratings section. UCSP reli­ability is integrally linked to the user’s assembly methods, circuit
board material and environment. See the UCSP Applications
Information section of this data sheet for more information.

*Future product—contact factory for availability.
**EP = Exposed paddle.

PART

POWER-UP STATE

†

I2C ADDRESSES FOR

SPECIAL-FUNCTION

REGISTER 2

MAX3301E

Shutdown (sdwn = 1,
bit 0 of special­function register 2)

16h, 17h

MAX3302E

Operating (sdwn = 1,
bit 0 of special­function register 2)

10h, 11h, and 16h, 17h

Selector Guide

†

The MAX3301E powers up in its lowest power state and the

MAX3302E powers up in the operational, VP/VM USB mode.

Pin Configurations appear at end of data sheet.

32 TQFN-EP**

28 TQFN-EP**

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

DC ELECTRICAL CHARACTERISTICS

(VCC= +3V to +4.5V, VL= +1.65V to +3.6V, C

FLYING

= 100nF, C

VBUS

= 1µF, ESR

CVBUS

= 0.1Ω (max), TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at V

CC

= +3.7V, VL= +2.5V, TA= +25°C.) (Note 2)

Note 1: The UCSP package is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the
device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recom­mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow. Preheating is
required. Hand or wave soldering is not allowed.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

All voltages are referenced to GND.
V

CC

, VL.....................................................................-0.3V to +6V

TRM (regulator off or supplied by V

BUS

)..-0.3V to (V

BUS

+ 0.3V)

TRM (regulator supplied by V

CC

)...............-0.3V to (VCC+ 0.3V)

D+, D- (transmitter tri-stated) ...................................-0.3V to +6V

D+, D- (transmitter functional)....................-0.3V to (V

CC

+ 0.3V)

V

BUS

.........................................................................-0.3V to +6V

ID_IN, SCL, SDA.......................................................-0.3V to +6V

INT, SPD, RESET, ADD, OE/INT, RCV, VP,

VM, SUS, DAT_VP, SE0_VM ......................-0.3V to (V

L

+ 0.3V)

C+.............................................................-0.3V to (V

BUS

+ 0.3V)

C-................................................................-0.3V to (V

CC

+ 0.3V)

Short-Circuit Duration, V

BUS

to GND .........................Continuous

Continuous Power Dissipation (T

A

= +70°C)

5 x 5 UCSP (derate 12.2mW/°C above +70°C) ...........976mW

32-Pin TQFN (5mm x 5mm x 0.8mm) (derate 21.3mW/°C

above +70°C).............................................................1702mW

28-Pin TQFN (4mm x 4mm x 0.8mm) (derate 20.8mW/°C

above +70°C).............................................................1666mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Bump Reflow Temperature (Note 1)

Infrared (15s) ...............................................................+200°C

Vapor Phase (20s) .......................................................+215°C

PARAMETER

SYM B O L

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage V

CC

3.0 4.5 V

TRM Output Voltage V

TRM

3.0 3.6 V

Logic Supply Voltage V

L

V

VL Supply Current I

VL

I2C interface in steady state 5 µA

VCC Operating Supply Current I

CC

USB normal mode, CL = 50pF, device
switching at full speed

10 mA

vbus_drv = 1, I

VBUS

= 0 1.4 2

VCC Supply Current During Full­Speed Idle

vbus_drv = 0, D+ = high, D- = low 0.5 0.8

mA

VCC Shutdown Supply Current

)

3.5 10 µA

VCC Interrupt Shutdown Supply
Current

)

ID_IN floating or high 20 30 µA

VCC Suspend Supply Current USB suspend mode, ID_IN floating or high

500 µA

LOGIC I/O

RC V , D AT_V P , S E 0_V M , INT,
OE/INT, V P , V M Outp ut H i g h

V ol tag e

V

OH

I

OUT

= 1mA (sourcing)

V

RCV, DAT_VP, SE0_VM, INT,
OE/INT, VP, VM Output Low
Voltage

V

OL

I

OUT

= 1mA (sinking) 0.4 V

OE/INT, SPD, SUS, RESET,
DAT_VP, SE0_VM Input High
Voltage

V

IH

V

I

CC(SHDN

I

CC(ISHDN

1.65 3.60

170

V L - 0.4

2/3 x V

L

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

_______________________________________________________________________________________ 3

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +4.5V, VL= +1.65V to +3.6V, C

FLYING

= 100nF, C

VBUS

= 1µF, ESR

CVBUS

= 0.1Ω (max), TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at V

CC

= +3.7V, VL= +2.5V, TA= +25°C.) (Note 2)

PARAMETER

SYM B O L

CONDITIONS

MIN

TYP

MAX

UNITS

OE/INT, SPD, SUS, RESET
DAT_VP, SE0_VM Input Low
Voltage

V

IL

0.4 V

ADD Input High Voltage V

IHA

V

ADD Input Low Voltage V

ILA

V

Input Leakage Current ±1µA

TRANSCEIVER SPECIFICATIONS

Differential Receiver Input
Sensitivity

|V

D+

- VD-| 0.2 V

Differential Receiver Common­Mode Voltage

0.8 2.5 V

Single-Ended Receiver Input Low
Voltage

V

ILD

D+, D- 0.8 V

Single-Ended Receiver Input
High Voltage

V

IHD

D+, D- 2.0 V

S i ng l e- E nd ed Recei ver H yster esi s

0.2 V

S i ng l e- E nd ed Outp ut Low V ol tag e

V

OLD

D+, D-, RL = 1.5kΩ from D+ or D- to 3.6V 0.3 V

S i ng l e- E nd ed Outp ut H i g h V ol tag e

V

OHD

D+, D-, RL = 15kΩ from D+ or D- to GND 2.8 3.6 V

Off-State Leakage Current D+, D- ±1µA

213

Driver Output Impedance

D+, D-, not
including R

EXT

213

Ω

ESD PROTECTION (V

BUS

, ID_IN, D+, D-)

Human Body Model

kV

IEC 61000-4-2 Air-Gap Discharge

kV

IEC 61000-4-2 Contact Discharge

±6kV

THERMAL SHUTDOWN

Thermal Shutdown Low-to-High

o

C

Thermal Shutdown High-to-Low

o

C

CHARGE-PUMP SPECIFICATIONS (vbus_drv = 1)

V

BUS

Output Voltage V

BUS

3V < V

C C

< 4.5V, C

V BUS

= 10µF, I

V BUS

= 8m A

V

V

BUS

Output Current I

VBUS

8mA

V

BUS

Output Ripple I

VBUS

= 8mA, C

VBUS

= 10µF

mV

2/3 x V

L

1/3 x V

L

Low steady-state drive

High steady-state drive

±15

±10

+160

+150

4.80 5.25

100

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

4 _______________________________________________________________________________________

DC ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +4.5V, VL= +1.65V to +3.6V, C

FLYING

= 100nF, C

VBUS

= 1µF, ESR

CVBUS

= 0.1Ω (max), TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at V

CC

= +3.7V, VL= +2.5V, TA= +25°C.) (Note 2)

PARAMETER

SYM B O L

CONDITIONS

MIN

TYP

MAX

UNITS

Switching Frequency f

SW

kHz

V

BUS

Leakage Voltage vbus_drv = 0 0.2 V

V

BUS

Rise Time

C

VBUS

= 10µF, I

VBUS

= 8mA, measured

from 0 to +4.4V

100 ms

V

BUS

Pulldown Resistance

3.8 5 6.5 kΩ

V

BUS

Pullup Resistance

Ω

V

BUS

Input Impedance

40 70 100 kΩ

COMPARATOR SPECIFICATIONS

V

B U S

V al i d C om p ar ator Thr eshol d

4.4 4.6 4.8 V

V

B U S

V al i d C om p ar ator H yster esi s

50 mV

Session-Valid Comparator
Threshold

V

TH-

0.8 1.4 2.0 V

Session-End Comparator
Threshold

V

TH-

0.2 0.5 0.8 V

dp_hi Comparator Threshold 0.8 1.3 2.0 V

dm_hi Comparator Threshold 0.8 1.3 2.0 V

cr_int Pulse Width

ns

cr_int Comparator Threshold 0.4 0.5 0.6 V

ID_IN SPECIFICATIONS

ID_IN Input Voltage for Car Kit

0.2 x

0.8 x
V

ID_IN Input Voltage for A Device

0.1 x
V

ID_IN Input Voltage for B Device

0.9 x
V

ID_IN Input Impedance Z

ID_IN

70

130 kΩ

ID_IN Input Leakage Current ID_IN = V

CC

-1 +1 µA

ID_IN Pulldown Resistance id_pulldown = 1

300 Ω

TERMINATING RESISTOR SPECIFICATIONS (D+, D-)

D+ Pulldown Resistor dp_pulldown = 1

15

kΩ

D- Pulldown Resistor dm_pulldown = 1

15

kΩ

D+ Pullup Resistor dp_pullup = 1

1.5

kΩ

D- Pullup Resistor dm_pullup = 1

1.5

kΩ

Z

INVBUS

V

TH-VBUS

V

HYS-VBUS

390

vb us_d ischrg = 1, vb us_d r v = 0, vb us_chr g = 0

vb us_chr g = 1, vb us_d r v = 0, vbus_di schr g = 0 650 930 1250

vb us_d ischrg = 0, vb us_d r v = 0, vb us_chr g = 0

SESS_VLD

SESS_END

750

V

CC

V

CC

100

150

14.25

14.25

1.425

1.425

V

CC

V

CC

15.75

15.75

1.575

1.575

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

_______________________________________________________________________________________ 5

TIMING CHARACTERISTICS

(VCC= +3V to +4.5V, VL= +1.65V to +3.6V, C

FLYING

= 100nF, C

VBUS

= 1µF, ESR

CVBUS

= 0.1Ω (max), TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at V

CC

= +3.7V, VL= +2.5V, TA= +25°C.) (Note 2)

PARAMETER

CONDITIONS

UNITS

TRANSMITTER CHARACTERISTICS (FULL-SPEED MODE)

D+, D- Rise Time t

R

Figures 2 and 5 4 20 ns

D+, D- Fall Time t

F

Figures 2 and 5 4 20 ns

Rise-/Fall-Time Matching Figures 2 and 5 (Note 3) 90

%

Output-Signal Crossover Voltage

V

CRS_F

Figures 2, 6, and 7 (Note 3) 1.3 2.0 V

TRANSMITTER CHARACTERISTICS (LOW-SPEED MODE)

D+, D- Rise Time t

R

Figures 2 and 5 75

ns

D+, D- Fall Time t

F

Figures 2 and 5 75

ns

Rise-/Fall-Time Matching Figures 2 and 5 80

%

Output-Signal Crossover Voltage

V

CRS_L

Figures 2, 6, and 7 1.3 2.0 V

TRANSMITTER TIMING (FULL-SPEED MODE)

t

PLH

Low-to-high, Figures 2 and 6 25

Driver Propagation Delay
(DAT_VP, SE0_VM to D+, D-)

t

PHL

High-to-low, Figures 2 and 6 25

ns

Driver Disable Delay t

PDZ

Figures 1 and 8 25 ns

Driver Enable Delay t

PZD

Figures 2 and 8 25 ns

TRANSMITTER TIMING (LOW-SPEED MODE) (Low-speed delay timing is dominated by the slow rise and fall times.)

SPEED-INDEPENDENT TIMING CHARACTERISTICS

Receiver Disable Delay t

PVZ

Figure 4 30 ns

Receiver Enable Delay t

PZV

Figure 4 30 ns

D+ Pullup Assertion Time During HNP 3 µs

RCV Rise Time t

R

Figures 3 and 5, CL = 15pF 4 ns

RCV Fall Time t

F

Figures 3 and 5, CL = 15pF 4 ns

Figures 3 and 10, |D+ - D-| to DAT_VP 30

Differential-Receiver Propagation
Delay

Figures 3 and 9, |D+ - D-| to RCV 30

ns

Single-Ended-Receiver
Propagation Delay

Figures 3 and 9, D+, D- to DAT_VP,
SE0_VM

30 ns

Interrupt Propagation Delay

µs

V

BUS_CHRG

Propagation Delay Dominated by the V

BUS

rise time 0.2 µs

Time to Exit Shutdown 1µs

Shutdown Delay 10 µs

SYM B O L

t

PHL

, t

PLH

t

, t

PHL

PLH

MIN TYP MAX

110

300

300

125

100

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

6 _______________________________________________________________________________________

I2C-/SMBus™-COMPATIBLE TIMING SPECIFICATIONS

(VCC= +3V to +4.5V, VL= +1.65V to +3.6V, C

FLYING

= 100nF, C

VBUS

= 1µF, ESR

CVBUS

= 0.1Ω (max), TA= T

MIN

to T

MAX

, unless

otherwise noted. Typical values are at V

CC

= +3.7V, VL= +2.5V, TA= +25°C.) (Note 2)

PARAMETER

CONDITIONS

Serial Clock Frequency f

SCL

400 kHz

Bus-Free Time Between Stop and
Start Conditions

t

BUF

1.3 µs

Start-Condition Hold Time

0.6 µs

Stop-Condition Setup Time

0.6 µs

Clock Low Period t

LOW

1.3 µs

Clock High Period t

HIGH

0.6 µs

Data Setup Time

ns

Data Hold Time

(Note 4) 0.9 µs

Rise Time of SDA and SCL t

R

(Note 5)

0.1 x
C

B

300 ns

Fall Time of SDA and SCL t

F

300 ns

Capacitive Load for each Bus
Line

C

B

400 pF

SDA AND SCL I/O STAGE CHARACTERISTICS

Input-Voltage Low V

IL

0.3 x
V

L

V

Input-Voltage High V

IH

0.7 x
V

L

V

SDA Output-Voltage Low V

OL

I

SINK

= 3mA 0.4 V

Pulse Width of Suppressed Spike

t

SP

(Note 6) 50 ns

Note 2: Parameters are 100% production tested at +25°C. Limits over temperature are guaranteed by design.
Note 3: Guaranteed by bench characterization. Limits are not production tested.
Note 4: A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s falling

edge.

Note 5: C

B

is the total capacitance of one bus line in pF, tested with CB= 400pF.

Note 6: Input filters on SDA, SCL, and ADD suppress noise spikes of less than 50ns.

SMBus™ is a trademark of Intel Corporation.

SYM B O L

t

HD_STA

t

SU_STO

MIN TYP MAX UNITS

t

SU_DAT

t

HD_DAT

100

20 +

Measured from 0.3 x VL to 0.7 x VL (Note 5)

DRIVER PROPAGATION DELAY HIGH-TO-LOW

(FULL-SPEED MODE)

MAX3301E toc09

4ns/div

D+
1V/div

D­1V/div

DAT_VP
1V/div

DRIVER PROPAGATION DELAY LOW-TO-HIGH

(LOW-SPEED MODE)

MAX3301E toc08

100ns/div

D­1V/div

D+
1V/div

DAT_VP
1V/div

DRIVER PROPAGATION DELAY HIGH-TO-LOW

(LOW-SPEED MODE)

MAX3301E toc07

100ns/div

D+
1V/div

D­1V/div

DAT_VP
1V/div

TIME TO EXIT SHUTDOWN

MAX3301E toc05

4µs/div

D­1V/div

D+
1V/div

SCL
1V/div

V

BUS

DURING SRP

MAX3301E toc06

20ns/div

V

BUS

1V/div

V

BUS

1V/div

C

VBUS

> 96µF

C

VBUS

> 13µF

TIME TO ENTER SHUTDOWN

MAX3301E toc04

100ns/div

D+
1V/div

D­1V/div

SCL
2V/div

V

BUS

OUTPUT VOLTAGE

vs. INPUT VOLTAGE (V

CC

)

MAX3301E toc03

INPUT VOLTAGE (VCC) (V)

V

BUS

OUTPUT VOLTAGE (V)

5.55.04.54.03.53.0

4.75

5.00

5.25

5.50

5.75

4.50

2.5 6.0

LINEAR REGULATOR
POWERED BY V

CC

I

VBUS

= 8mA

I

VBUS

= 0

V

BUS

OUTPUT VOLTAGE

vs. V

BUS

OUTPUT CURRENT

MAX3301E toc02

V

BUS

OUTPUT CURRENT (mA)

V

BUS

OUTPUT VOLTAGE (V)

252015105

4.25

4.50

4.75

5.00

5.25

5.50

4.00
030

VCC = 3.0V
V

CC

= 4.2V

LINEAR REGULATOR
POWERED BY V

CC

INPUT CURRENT (ICC)

vs. V

BUS

OUTPUT CURRENT

MAX3301E toc01

V

BUS

OUTPUT CURRENT (mA)

INPUT CURRENT (I

CC

) (mA)

161284

10

20

30

40

50

0

020

VCC = 3.3V
V

CC

= 4.2V

LINEAR REGULATOR
POWERED BY V

CC

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

_______________________________________________________________________________________ 7

Typical Operating Characteristics

(Typical operating circuit, VCC= +3.7V, VL= +2.5V, C

FLYING

= 100nF, TA= +25°C, unless otherwise noted.)

SUPPLY CURRENT

vs. TEMPERATURE

MAX3301E toc15

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

603510-15

0.2

0.4

0.6

0.8

1.0

0

-40 85

V

BUS

OFF

FULL-SPEED IDLE

VCC = 3.3V

VCC = 4.2V

DRIVER DISABLE DELAY

(LOW-SPEED MODE)

MAX3301E toc14

10ns/div

D+
1V/div

D­1V/div

OE/INT
1V/div

DRIVER ENABLE DELAY

(LOW-SPEED MODE)

MAX3301E toc13

100ns/div

D­1V/div

D+
1V/div

CD+ = CD- = 400pF

OE/INT
1V/div

DRIVER DISABLE DELAY

(FULL-SPEED MODE)

MAX3301E toc12

10ns/div

D+
1V/div

D­1V/div

OE/INT
1V/div

DRIVER ENABLE DELAY

(FULL-SPEED MODE)

MAX3301E toc11

10ns/div

D­1V/div

D+
1V/div

OE/INT
1V/div

DRIVER PROPAGATION DELAY LOW-TO-HIGH

(FULL-SPEED MODE)

MAX3301E toc10

4ns/div

D­1V/div

D+
1V/div

DAT_VP
1V/div

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Typical operating circuit, VCC= +3.7V, VL= +2.5V, C

FLYING

= 100nF, TA= +25°C, unless otherwise noted.)

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

_______________________________________________________________________________________ 9

Pin Description

PIN

MAX3302E

28-PIN TQFN

MAX3301E

FUNCTION

12

System-Side Data Input/Output. DAT_VP is an input if OE/INT is logic 0.
DAT_VP is an output if OE/INT is logic 1. Program the function of DAT_VP
with the dat_se0 bit (bit 2 of control register 1, see Table 7).

2, 25 3, 29

D1,

E3

V

CC

Input Power Supply. Connect a +3V to +4.5V supply to VCC and bypass to
GND with a 1µF capacitor. The supply range enables direct powering from
one Li+ battery.

3, 9, 23

1, 4, 9, 12, 17,

25, 28

—N.C. No Connection. Not internally connected.

45C1C- Charge-Pump Flying-Capacitor Negative Terminal

56

System-Side Data Input/Output. SE0_VM is an input if OE/INT is logic 0.
SE0_VM is an output if OE/INT is logic 1. Program the function of SE0_VM
with the dat_se0 bit (bit 2 of control register 1, see Table 7).

6, 18 7, 21

B1,

GND Ground

78A1SDA I2C-Compatible Serial Data Interface. Open-drain data input/output.

810B2SCL I2C-Compatible Serial Clock Input

10 11 A2

O utp ut E nab l e. O E/INT contr ol s the i np ut or outp ut status of D AT_V P /S E 0_V M
and D + /D - . W hen O E/INT i s l og i c 0, the d evi ce i s i n tr ansm i t m od e. W hen

O E/INT i s l og i c 1, the d evi ce i s i n r ecei ve m od e. When i n susp end m od e,
O E/INT can b e p r og r am m ed to functi on as an i nter r up t outp ut that d etects the

sam e i nter r up ts as INT. The oe_i nt_en b i t ( b i t 5 of contr ol r eg i ster 1, see Tab l e

7) enab l es and d i sab l es the i nter r up t ci r cui tr y of O E/INT. The i r q _m od e b i t ( b i t 1
of sp eci al - functi on r eg i ster 2, see Tab l e 15) p r og r am s the outp ut confi g ur ati on
of INT and O E/INT as op en- d r ai n or p ush- p ul l .

11 13 A3 RCV

D+ and D- Differential Receiver Output. In receive mode (see Table 4), when
D+ is high and D- is low, RCV is high. In receive mode, when D+ is low and
D- is high, RCV is low. RCV is low in suspend mode.

12 14 B3 SPD

Speed-Selector Input. Connect SPD to GND to select the low-speed data rate
(1.5Mbps). Connect SPD to V

L

to select the full-speed data rate (12Mbps).
Disable the SPD input by writing a 1 to spd_susp_ctl (bit 1 in special-function
register 1, see Table 14). The speed bit (bit 0 of control register 1, see Table

7) determines the maximum data rate of the MAX3301E/MAX3302E when the
SPD input is disabled.

13 15 A4 V

L

System-Side Logic-Supply Input. Connect to the system’s logic-level power
supply, +1.65V to +3.6V. This sets the maximum output levels of the logic
outputs and the input thresholds of the logic inputs. Bypass to GND with a

0.1µF capacitor.

14 16 A5 SUS

Active-High Suspend Input. Drive SUS low for normal USB operation. Drive
SUS high to enable suspend mode. RCV asserts low in suspend mode.
Disable the SUS input by writing a 1 to spd_susp_ctl (bit 1 in special-function
register 1, see Table 14). The suspend bit (bit 1 of control register 1, see
Table 7) determines the operating mode of the MAX3301E/MAX3302E when
the SUS input is disabled.

NAME

D2 DAT_VP

C2 SE0_VM

C5

UCSP

32-PIN TQFN

OE/INT

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

10 ______________________________________________________________________________________

Pin Description (continued)

PIN

MAX3302E

28-PIN TQFN

MAX3301E

FUNCTION

15 18 B4 INT

Active-Low Interrupt Source. Program the INT output as push-pull or open­drain with the irq_mode bit (bit 1 of special-function register 2, see Tables 15
and 16).

16 19 B5

Active-Low Reset Input. Drive RESET low to asynchronously reset the
MAX3301E/MAX3302E.

17 20

ADD I2C-Interface Address Selection Input. (See Table 5.)

19 22

ID Input. ID_IN is internally pulled up to VCC. The state of ID_IN determines
ID bits 3 and 5 of the interrupt source register (see Table 10).

20 23

D-

USB Differential Data Input/Output. Connect D- to the D- terminal of the USB
connector through a 27.4Ω ±1% series resistor.

21 24 E5 D+

USB Differential Data Input/Output. Connect D+ to the D+ terminal of the USB
connector through a 27.4Ω ±1% series resistor.

22 26

VM

Single-Ended Receiver Output. VM functions as a receiver output in all
operating modes. VM duplicates D-.

24 27 E4 TRM

USB Transceiver Regulated Output Voltage. TRM provides a regulated 3.3V
output. Bypass TRM to GND with a 1µF ceramic capacitor installed as close
to the device as possible. TRM normally derives power from V

CC

. TRM
provides power to internal circuitry and provides the pullup voltage for the
internal USB pullup resistor. Do not use TRM to power external circuitry. The
reg_sel bit (bit 3 of special-function register 2, see Table 15 and Table 16)
controls the TRM power source with software.

26 30

VP

Single-Ended Receiver Output. VP functions as a receiver output in all
operating modes. VP duplicates D+.

27 31 E2

USB Bus Power. Use V

BUS

as an output to power the USB bus, or as an input
to power the internal linear regulator. Bits 5 to 7 of control register 2 (see
Table 8) control the charging and discharging functions of V

BUS

.

28 32 E1 C+ Charge-Pump Flying-Capacitor Positive Terminal

EP EP — EP Exposed Paddle. Connect to GND or leave floating

Test Circuits and Timing Diagrams

DUT

27.4Ω 220Ω

TEST POINT

C

L

V

D+/D-

LOAD FOR DISABLE TIME (D+/D-) MEASUREMENT
V = 0 FOR t

PHZ

.

V = V

TRM

FOR t

PLZ

.

C

L

= 50pF FOR FULL SPEED.

C

L

= 200pF TO 600pF FOR LOW SPEED.

Figure 1. Load for Disable Time Measurement

DUT

27.4Ω

15kΩ

TEST POINT

C

L

D+/D-

LOAD FOR

1) ENABLE TIME (D+/D-) MEASUREMENT

2) DAT_VP/SEO_VM TO D+/D- PROPAGATION DELAY

3) D+/D- RISE/FALL TIMES
C

L

= 50pF FOR FULL SPEED.

C

L

= 200pF TO 600pF FOR LOW SPEED.

Figure 2. Load for Enable Time, Transmitter Propagation Delay,
and Transmitter Rise/Fall Times

NAME

32-PIN TQFN

UCSP

RESET

C3

C4 ID_IN

D5

D4

D3

V

BUS

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 11

Test Circuits and Timing Diagrams (continued)

90%

10%

V

OH

V

OL

t

R

t

F

Figure 5. Rise and Fall Times

t

PLH

D+

D-

V

CRS_F

, V

CRS_L

V

OLD

V

OHD

V

CRS_F

, V

CRS_L

DAT_VP

SE0_VM

t

PHL

Figure 6. Timing of DAT_VP, SE0_VM to D+, D- in VP_VM
Mode (dat_se0 = 0)

t

PLH

D+

D-

V

CRS_F

, V

CRS_L

V

OLD

V

OHD

V

CRS_F

, V

CRS_L

DAT_VP

SE0_VM

t

PHL

Figure 7. Timing of DAT_VP, SE0_VM to D+/D- in DAT_SE0
Mode (dat_se0 = 1)

t

PDZ

D+ OR D-

V

OL

V

OLD

+ 0.3V

V

OHD

- 0.3V

V

OH

V

L

VL

/ 2 VL

/ 2

0V

t

PZD

OE/INT

Figure 8. Enable and Disable Timing

t

PHL

t

PHL

t

PLH

D+

D-

RCV

DAT_VP

SE0_VM

3V

0V

V

L

V

L

V

L

VL / 2

V

L

/ 2

V

L

/ 2

0V

0V

0V

t

PLH

t

PLH

t

PHL

D+/D- RISE/FALL TIMES ≤ 8ns, VL = 1.8V, 2.5V, OR 3.3V

Figure 9. D+/D- to RCV, DAT_VP, SE0_VM Propagation Delays
(VP_VM Mode)

t

PHL

D+

D-

DAT_VP

SE0_VM

3V

0V

V

L

VL / 2

0V

t

PLH

D+/D- RISE/FALL TIMES ≤ 8ns, VL = 1.8V, 2.5V, OR 3.3V

Figure 10. D+/D- to DAT_VP, SE0_VM Propagation Delays
(DAT_SE0 Mode)

DUT

TEST POINT

C

L

RCV, VP, VM,
DAT_VP,
SEO_VM

LOAD FOR

1) D+/D- TO RCV/VP/VM/DAT_VP/SEO_VM PROPAGATION DELAYS

2) RCV/VP/VM/DAT_VP/SEO_VM RISE/FALL TIMES (C

L

= 15pF)

Figure 3. Load for Receiver Propagation Delay and Receiver
Rise/Fall Times

DUT

270Ω

TEST POINT

V = 2/3 x V

L

DAT_VP
SEO_VM

Figure 4. Load for DAT_VP, SE0_VM Enable/Disable Time
Measurements

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

12 ______________________________________________________________________________________

Block Diagram

POWER
BLOCK

VP

VM

RCV

GND

SPD

SUS

SE0_VM

DAT_VP

OE/INT

RESET

INT

LEVEL

TRANSLATOR

SERIAL

CONTROLLER

D-

D+

V

BUS

TRM

ID_IN

C-

C+

V

CC

V

L

CAR KIT INTERRUPT

DETECTOR

PULLUP/PULLDOWN

RESISTORS

LINEAR

REGULATOR

V

BUS

COMPARATORS

V

BUS

CHARGE PUMP

ID

DETECTOR

SDA

SCL

ADD

DIFF

TX

DIFF

RX

SE
D+

SE
D-

MAX3301E
MAX3302E

Figure 11. Block Diagram

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 13

Detailed Description

The USB OTG specification defines a dual-role USB
device that acts either as an A device or as a B device.
The A device supplies power on V

BUS

and initially
serves as the USB host. The B device serves as the ini­tial peripheral and requires circuitry to monitor and pulse
V

BUS

. These initial roles can be reversed using HNP.

The MAX3301E/MAX3302E combine a low- and full­speed USB transceiver with additional circuitry required
by a dual-role device. The MAX3301E/MAX3302E
employ flexible switching circuitry to enable the device
to act as a dedicated host or peripheral USB transceiv­er. For example, the charge pump can be turned off and
the internal regulator can be powered from V

BUS

for

bus-powered peripheral applications.

The Selector Guide shows the differences between the
MAX3301E and MAX3302E. The MAX3301E powers up
in its lowest power state and must be turned on by set­ting the sdwn bit to 0. The MAX3302E powers up in the
operational, VP/VM USB mode. This allows a micro­processor (µP) to use the USB port for power-on boot­up, without having to access I2C. To put the MAX3302E
into low-power shutdown, set the sdwn bit to 0. In the
MAX3302E, special-function register 2 can be
addressed at I2C register location 10h, 11h (as well as
locations 16h, 17h) to support USB OTG serial-interface
engine (SIE) implementations that are limited to I2C
register addresses between 0h and 15h.

Transceiver

The MAX3301E/MAX3302E transceiver complies with
the USB version 2.0 specification, and operates at full­speed (12Mbps) and low-speed (1.5Mbps) data rates.
Set the data rate with the SPD input. Set the direction of
data transfer with the OE/INT input. Alternatively, control
transceiver operation with control register 1 (Table 7)
and special-function registers 1 and 2 (see Tables 14,
15, and 16).

Level Shifters

Internal level shifters allow the system-side interface to
run at logic-supply voltages as low as +1.65V. Interface
logic signals are referenced to the voltage applied to
the logic-supply voltage, VL.

Charge Pump

The MAX3301E/MAX3302E’s OTG-compliant charge
pump operates with +3V to +4.5V input supply voltages
(VCC) and supplies a +4.8V to +5.25V OTG-compatible
output on V

BUS

while sourcing the 8mA or greater out­put current that an A device is required to supply.
Connect a 0.1µF flying capacitor between C+ and C-.
Bypass V

BUS

to GND with a 1µF to 6.5µF capacitor, in

accordance with USB OTG specifications. The charge
pump can be turned off to conserve power when not
used. Control of the charge pump is set through the
vbus_drv bit (bit 5) of control register 2 (see Table 8).

Linear Regulator (TRM)

An internal 3.3V linear regulator powers the transceiver
and the internal 1.5kΩ D+/D- pullup resistor. Under the
control of internal register bits, the linear regulator can be
powered from VCCor V

BUS

. The regulator power-supply
settings are controlled by the reg_sel bit (bit 3) in special­function register 2 (Tables 15 and 16). This flexibility
allows the system designer to configure the MAX3301E/
MAX3302E for virtually any USB power situation.

The output of the TRM is not a power supply. Do not use
as a power source for any external circuitry. Connect a

1.0µF (or greater) ceramic or plastic capacitor from TRM
to GND, as close to the device as possible.

V

BUS

Level-Detection Comparators

Comparators drive interrupt source register bits 0, 1,
and 7 (Table 10) to indicate important USB OTG V

BUS

voltage levels:

•V

BUS

is valid (vbus_vld)

• USB session is valid (sess_vld)

• USB session has ended (sess_end)

The vbus_valid comparator sets vbus_vld to 1 if V

BUS

is

higher than the V

BUS

valid comparator threshold. The

V

BUS

valid status bit (vbus_vld) is used by the A device
to determine if the B device is sinking too much current
(i.e., is not supported). The session_valid comparator
sets sess_vld to 1 if V

BUS

is higher than the session
valid comparator threshold. This status bit indicates that
a data transfer session is valid. The session_end com­parator sets sess_end to 1 if V

BUS

is higher than the

Figure 12. Comparator Network Diagram

V

BUS

VBUS_VLD

V

TH-VBUS

V

TH-SESS_VLD

V

TH-SESS_END

SESS_VLD

SESS_END

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

14 ______________________________________________________________________________________

MODE

I2C

ID_IN

sess_end

COMP

sess _vld

COMP

vbus_ vld

COMP

cr_int
COMP

dp_hi

dm_hi

TRMTXDIFF

SE

RX

Shutdown

1

✓ XX X X X XXXXXX

Interrupt

Shutdown

2

✓✓ X ✓ XX✓✓X XXX

Suspend

3

✓✓ ✓ ✓ ✓✓✓✓✓✓ X ✓

Normal

Operating

✓✓ ✓ ✓ ✓✓✓✓✓✓

✓

Table 1. Functional Blocks Enabled During Specific Operating Modes

✓ = Enabled.

X = Disabled.

1. For the MAX3301E, enter shutdown mode by writing a 1 to sdwn (bit 0 of special-function register 2). For the MAX3302E, enter
shutdown mode by writing a 0 to

sdwn

(bit 0 of special-function register 2).

2. Enter interrupt shutdown mode by writing a 1 to int_sdwn (bit 0 of special-function register 1).

3. Enter suspend mode by writing a 1 to spd_susp_ctl (bit 1 of special-function register 1) and suspend (bit 1 of control register 1), or
by writing a 0 to spd_susp_ctl (bit 1 of special-function register 1) and driving SUS high.

session end comparator threshold. Figure 12 shows the
level-detector comparators. The interrupt-enable regis­ters (Tables 12 and 13) determine whether a falling or
rising edge of V

BUS

asserts these status bits.

ID_IN

The USB OTG specification defines an ID input that
determines which dual-role device is the default host.
An OTG cable connects ID to ground in the connector
of one end and is left unconnected in the other end.
Whichever dual-role device receives the grounded end
becomes the A device. The MAX3301E/MAX3302E pro­vide an internal pullup resistor on ID_IN. Internal com­parators detect if ID_IN is grounded or left floating.

Interrupt Logic

When OTG events require action, the MAX3301E/
MAX3302E provide an interrupt output signal on INT.
Alternatively, OE/INT can be configured to act as an
interrupt output while the device operates in USB sus­pend mode. Program INT and OE/INT as open-drain or
push-pull interrupts with irq_mode (bit 1 of special-func­tion register 2, see Tables 15 and 16).

V

BUS

Power Control

V

BUS

is a dual-function port that powers the USB bus
and/or provides a power source for the internal linear reg­ulator. The V

BUS

power-control block performs the various
switching functions required by an OTG dual-role device.
These actions are programmed by the system logic using
bits 5 to 7 of control register 2 (see Table 8) to:

• Discharge V

BUS

through a resistor

• Provide power-on or receive power from V

BUS

• Charge V

BUS

through a resistor

The OTG supplement allows an A device to turn V

BUS

off when the bus is not being used to conserve power.
The B device can issue a request that a new session be
started using SRP. The B device must discharge V

BUS

to a level below the session-end threshold (0.8V) to
ensure that no session is in progress before initiating
SRP. Setting bit 6 of control register 2 to 1, discharges
V

BUS

to GND through a 5kΩ current-limiting resistor.

When V

BUS

has discharged, the resistor is removed

from the circuit by resetting bit 6 of control register 2.

An OTG A device is required to supply power on V

BUS

.

The MAX3301E/MAX3302E provide power to V

BUS

from
VCCor from the internal charge pump. Set bit 5 in control
register 2 to 1 in both cases. Bit 5 in control register 2
controls a current-limited switch, preventing damage to
the device in the event of a V

BUS

short circuit.

An OTG B device (peripheral mode) can request a ses­sion using SRP. One of the steps in implementing SRP
requires pulsing V

BUS

high for a controlled time. A 930Ω
resistor limits the current according to the OTG specifi­cation. Pulse V

BUS

through the pullup resistor by assert-

ing bit 7 of control register 2. Prior to pulsing V

BUS

(bit

7), a B device first connects an internal pulldown resis­tor to discharge V

BUS

below the session-end threshold.
The discharge current is limited by the 5kΩ resistor and
set by bit 6 of control register 2. An OTG A device must

COMP

COMP

RX

✓

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 15

supply 5V power and at least 8mA on V

BUS

. Setting bit

5 of control register 2 turns on the V

BUS

charge pump.

Operating Modes

The MAX3301E/MAX3302E have four operating modes to
optimize power consumption. Only the I2C interface
remains active in shutdown mode, reducing supply cur­rent to 1µA. The I2C interface, the ID_IN port, and the
session-valid comparator all remain active in interrupt
shutdown mode. RCV asserts low in suspend mode; how­ever, all other circuitry remains active. Table 1 lists the
active blocks’ power in each of the operating modes.

Applications Information

Data Transfer

Transmitting Data to the USB

The MAX3301E/MAX3302E transceiver features two
modes of transmission: DAT_SE0 or VP_VM (see Table 3).
Set the transmitting mode with dat_se0 (bit 2 in control
register 1, see Table 7). In DAT_SE0 mode with OE/INT
low, DAT_VP specifies data for the differential transceiv­er, and SE0_VM forces D+/D- to the single-ended zero
(SE0) state. In VP_VM mode with OE/INT low, DAT_VP
drives D+, and SE0_VM drives D-. The differential
receiver determines the state of RCV.

Receiving Data from the USB

The MAX3301E/MAX3302E transceiver features two
modes of receiving data: DAT_SE0 or VP_VM (see
Table 4). Set the receiving mode with dat_se0 (bit 2 in
control register 1, see Table 7). In DAT_SE0 mode with
OE/INT high, DAT_VP is the output of the differential
receiver and SE0_VM indicates that D+ and D- are both
logic-low. In VP_VM mode with OE/INT high, DAT_VP
provides the input logic level of D+ and SE0_VM pro­vides the input logic level of D-. The differential receiver
determines the state of RCV. VP and VM echo D+ and
D-, respectively.

OE/INT

OE/INT controls the direction of communication. OE/INT
can also be programmed to act as an interrupt output
when in suspend mode. The output-enable portion con­trols the input or output status of DAT_VP/SE0_VM and
D+/D-. When OE/INT is a logic 0, DAT_VP and SE0_VM
function as inputs to the D+ and D- outputs in a method
depending on the status of dat_se0 (bit 2 in control reg­ister 1). When OE/INT is a logic 1, DAT_VP and SE0_VM
indicate the activity of D+ and D-.

OE/INT functions as an interrupt output when the
MAX3301E/MAX3302E is in suspend mode and
oe_int_en = 1 (bit 5 in control register 1, see Table 7). In

this mode, OE/INT detects the same interrupts as INT.
Set irq_mode (bit 1 in special-function register 2, see
Tables 15 and 16) to 0 to program OE/INT as an open­drain interrupt output. Set irq_mode to 1 to configure
OE/INT as a push-pull interrupt output.

RCV

RCV monitors D+ and D- when receiving data. RCV is a
logic 1 for D+ high and D- low. RCV is a logic 0 for D+
low and D- high. RCV retains its last valid state when D+
and D- are both low (single-ended zero, or SE0). RCV
asserts low in suspend mode. Table 4 shows the state
of RCV.

SPD

Use hardware or software to control the slew rate of the
D+ and D- terminals. The SPD input sets the slew rate of
the MAX3301E/MAX3302E when spd_susp_ctl (bit 1 in
special-function register 1, see Table 14) is 0. Drive SPD
low to select low-speed mode (1.5Mbps). Drive SPD
high to select full-speed mode (12Mbps). Alternatively,
when spd_susp_ctl (bit 1 of special-function register 1)
is 1, software controls the slew rate. The SPD input is
ignored when using software to control the data rate.
The speed bit (bit 0 of control register 1, see Table 7)
sets the slew rate when spd_susp_ctl = 1.

SUS

Use hardware or software to control the suspend mode
of the MAX3301E/MAX3302E. Set spd_susp_ctl (bit 1 of
special-function register 1, see Table 14) to 0 to allow
the SUS input to enable and disable the suspend mode
of the MAX3301E/MAX3302E. Drive SUS low for normal
operation. Drive SUS high to enable suspend mode.
RCV asserts low in suspend mode while all other circuit­ry remains active.

Alternatively, when the spd_susp_ctl bit (bit 1 of special­function register 1) is set to 1, software controls the sus­pend mode. Set the suspend bit (bit 1 of control register
1, see Table 7) to 1 to enable suspend mode. Set the
suspend bit to 0 to resume normal operation. The SUS
input is ignored when using software to control suspend
mode. The MAX3301E/MAX3302E must be in full-speed
mode (SPD = high or speed = 1) to issue a remote
wake-up from the device when in suspend mode.

RESET

The active-low RESET input allows the MAX3301E/
MAX3302E to be asynchronously reset without cycling
the power supply. Drive RESET low to reset the internal
registers (see Tables 7–16 for the default power-up
states). Drive RESET high for normal operation.

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

16 ______________________________________________________________________________________

2-Wire I2C-Compatible Serial Interface

A register file controls the various internal switches and
operating modes of the MAX3301E/MAX3302E through
a simple 2-wire interface operating at clock rates up to
400kHz. This interface supports data bursting, where
multiple data phases can follow a single address phase.

UART Mode

Set uart_en (bit 6 in control register 1) to 1 to place the
MAX3301E/MAX3302E in UART mode. D+ transfers
data to DAT_VP and SE0_VM transfers data to D- in
UART mode.

General-Purpose Buffer Mode

Set gp_en (bit 7 in special-function register 1) and
dat_se0 (bit 2 in control register 1) to 1, set uart_en (bit 6
in control register 1) to 0, and drive OE/INT low to place
the MAX3301E/MAX3302E in general-purpose buffer
mode. Control the direction of data transfer with dmi­nus_dir and dplus_dir (bits 3 and 4 of special-function
register 1, see Tables 2 and 14).

Serial Addressing

The MAX3301E/MAX3302E operate as a slave device
that sends and receives control and status signals
through an I2C-compatible 2-wire interface. The inter­face uses a serial data line (SDA) and a serial clock line
(SCL) to achieve bidirectional communication between
master(s) and slave(s). A master (typically a microcon­troller) initiates all data transfers to and from the
MAX3301E/MAX3302E and generates the SCL clock
that synchronizes the data transfer (Figure 13).

The MAX3301E/MAX3302E SDA line operates as both an
input and as an open-drain output. SDA requires a

pullup resistor, typically 4.7kΩ. The MAX3301E/
MAX3302E SCL line only operates as an input. SCL
requires a pullup resistor if there are multiple masters on
the 2-wire interface, or if the master in a single-master
system has an open-drain SCL output.

Each transmission consists of a start condition (see
Figure 14) sent by a master device, the MAX3301E/
MAX3302E 7-bit slave address (determined by the state
of ADD), plus an R/W bit (see Figure 15), a register
address byte, one or more data bytes, and a stop condi­tion (see Figure 14).

dplus_dir dminus_ dir

DIRECTION OF DATA

TRANSFER

00

DAT_VP → D+

SE0_VM → D-

01

DAT_VP → D+

SE0_VM ← D-

10

DAT_VP ← D+

SE0_VM → D-

11

DAT_VP ← D+

SE0_VM ← D-

Table 2. Setting the Direction of Data
Transfer in General-Purpose Buffer Mode

SDA

SCL

t

HD: STA

t

SU: DAT

t

HD: DAT

t

SU: STA

t

HD: STA

t

SU: STO

t

BUF

t

LOW

t

HIGH

t

R

t

F

START

CONDITION

REPEATED START

CONDITION

STOP

CONDITION

START

CONDITION

Figure 13. 2-Wire Serial-Interface Timing Details

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 17

CONTROL PIN/BIT INPUT OUTPUT

MODE

D+ D-

DESCRIPTION

000 1 0 0 0 1

000 1 1 0 1 0

000 1 0 1 0 0

Functional

DAT_SE0

000 1 1 1 0 0

000 0 0 0 0 0

000 0 1 0 1 0

000 0 0 1 0 1

Functional

VP_VM

000 0 1 1 1 1

U S B functi onal m od e
tr anscei ver and I

2

C i nter face

ar e ful l y functi onal

100 1 0 0 0 1

100 1 1 0 1 0

100 1 0 1 0 0

100 1 1 1 0 0

100 0 0 0 0 0

100 0 1 0 1 0

100 0 0 1 0 1

100 0 1 1 1 1

Suspend

101 X X X

Hi-Z

Hi-Z

USB suspend mode

Receiving

001 X X X

Hi-Z

Hi-Z

See Table 4

General­purpose

buffer

X101 See Table 2

General-purpose buffer
mode

Table 3. Transmit Mode

SDA

SCL

S

START

CONDITION

P

STOP

CONDITION

Figure 14. Start and Stop Conditions

SDA

SCL

START

MSB

1

0

0

1

0

0A0

LSB

ACK

R/W

Figure 15. Slave Address

SUS GP_EN

OE/INT

DAT_SE0 DAT_VP SE0_VM

Driver is

Driver is

Driver is

Driver is

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

18 ______________________________________________________________________________________

CONTROL PIN/BIT

OUTPUTS

MODE

SUS

RCV

VM

001 11

Last value

1

Last value

of RCV

001 11

101

001 11

000

001 11

0

101 11

010

101 11

100

101 11

000

Functional

DAT_SE0

101 11

100

001 01

00

Last value

of RCV

001 01

101

001 01

010

001 01

11

101 01

000

101 01

100

101 01

010

Functional

VP_VM

101 01

110

General-

purpose buffer

X1XXX See Table 2 0

Transmitting

(see Table 3)

XX0 XX — 0

Unidirectional

(transmitter

only)

XXX X0 — 0

Echo

D-

Table 4. Receive Mode

Note 7: Enter suspend mode by driving SUS high or by writing a 1 to suspend (bit 1 in control register 1), depending on the status of

spd_susp_ctl in special-function register 1.

X = Don’t care.

(NOTE 7)

GP_EN OE/INT DAT_SE0 BI_DI D+ D- DAT_VP SE0 _ VM

INPUTS

00

10

01

11Undefined

00

10

01

11

00

10

01

11

00

10

01

11

of DAT_VP

Undefined

Undefined

VP

Echo

D+

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 19

Start and Stop Conditions

Both SCL and SDA assert high when the interface is not
busy. A master device signals the beginning of a trans­mission with a start (S) condition by transitioning SDA
from high to low while SCL is high. The master issues a
stop (P) condition by transitioning SDA from low to high
while SCL is high. The bus is then free for another trans­mission (see Figure 14).

Bit Transfer

One data bit is transferred during each clock pulse. The
data on SDA must remain stable while SCL is high (see
Figure 16).

Acknowledge

The acknowledge bit (ACK) is the 9th bit attached to
any 8-bit data word. ACK is always generated by the
receiving device. The MAX3301E/MAX3302E generate

an ACK when receiving an address or data by pulling
SDA low during the ninth clock period. When transmit­ting data, the MAX3301E/MAX3302E wait for the receiv­ing device to generate an ACK. Monitoring ACK allows
for detection of unsuccessful data transfers. An unsuc­cessful data transfer occurs if a receiving device is busy
or if a system fault has occurred. In the event of an
unsuccessful data transfer, the bus master should reat­tempt communication at a later time.

Slave Address

A bus master initiates communication with a slave
device by issuing a START condition followed by the 7­bit slave address (see Figure 15). When idle, the
MAX3301E/MAX3302E wait for a START condition fol­lowed by its slave address. The LSB of the address
word is the read/write (R/W) bit. R/W indicates whether
the master is writing to or reading from the
MAX3301E/MAX3302E (R/W = 0 selects the write con­dition, R/W = 1 selects the read condition). After
receiving the proper address, the MAX3301E/
MAX3302E issue an ACK.

The MAX3301E/MAX3302E have two possible addresses
(see Table 5). Address bits A6 through A1 are preset,
while a reset condition or an I2C general call address
loads the value of A0 from ADD. Connect ADD to GND to
set A0 to 0. Connect ADD to VLto set A0 to 1. This allows
up to two MAX3301E’s or two MAX3302E’s to share the
same bus.

Write Byte Format

Writing data to the MAX3301E/MAX3302E requires the
transmission of at least 3 bytes. The first byte consists of
the MAX3301E/MAX3302E’s 7-bit slave address, fol­lowed by a 0 (R/W bit). The second byte determines
which register is to be written to. The third byte is the
new data for the selected register. Subsequent bytes
are data for sequential registers. Figure 18 shows the
typical write byte format.

Read Byte Format

Reading data from the MAX3301E/MAX3302E requires
the transmission of at least 3 bytes. The first byte con­sists of the MAX3301E/MAX3302E’s slave address, fol­lowed by a 0 (R/W bit). The second byte selects the
register from which data is read. The third byte consists

SDA

SCL

DATA LINE STABLE,

DATA VALID

CHANGE OF DATA

ALLOWED

Figure 16. Bit Transfer

SCL

START

CONDITION

S

SDA BY

TRANSMITTER

SDA BY

RECEIVER

CLOCK PULSE FOR ACKNOWLEDGEMENT

12 8 9

Figure 17. Acknowledge

A

REGISTER ADDRESS

(8 BITS)

MSB LSB

AAP

MSB LSB

DATA

(8 BITS)

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 0

R/W

Figure 18. Write Byte Format

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

20 ______________________________________________________________________________________

of the MAX3301E/MAX3302E’s slave address, followed
by a 1 (R/W bit). The master then reads one or more
bytes of data. Figure 19 shows the typical read byte
format.

Burst-Mode Write Byte Format

The MAX3301E/MAX3302E allow a master device to
write to sequential registers without repeatedly sending
the slave address and register address each time. The
master first sends the slave address, followed by a 0 to
write data to the MAX3301E/MAX3302E. The
MAX3301E/MAX3302E send an acknowledge bit back
to the master. The master sends the 8-bit register

address and the MAX3301E/MAX3302E return an
acknowledge bit. The master writes a data byte to the
selected register and receives an acknowledge bit if a
supported register address has been chosen. The reg­ister address increments and is ready for the master to
send the next data byte. The MAX3301E/MAX3302E
send an acknowledge bit after each data byte. If an
unsupported register is selected, the MAX3301E/
MAX3302E send a NACK to the master and the register
index does not increment (see Figure 20).

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 0

A

REGISTER ADDRESS (K)

(8 BITS)

MSB LSB

AA

MSB LSB

DATA (K)

(8 BITS)

DATA (K+1)

(8 BITS)

A

DATA (K+2)

(8 BITS)

MSB LSB

AA

MSB LSB

DATA (K+N)

(8 BITS)

MSB LSB

P

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 0

A

UNSUPPORTED REGISTER ADDRESS (K)

(8 BITS)

MSB LSB

ANA

MSB LSB

DATA (K)

(8 BITS)

MAX3301E/MAX3302E RECOGNIZES

ITS ADDRESS

MAX3301E/MAX3302E SENDS

AN ACK

MAX3301E/MAX3302E RECOGNIZES A WRITE TO AN

UNSUPPORTED LOCATION, THEN SENDS A NACK

R/W

R/W

Figure 20. Burst-Mode Write Byte Format

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 0 0 0

A

REGISTER ADDRESS

(8 BITS)

MSB LSB

A

RS

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 1 1 00

A

DATA

(8 BITS)

MSB LSB

NA P

R/W

R/W

Figure 19. Read Byte Format

R/W: Read/write (R/W = 1: read; R/W = 0: write)

S: Start condition

RS: Repeated start condition

P: Stop condition

A: Acknowledge bit from the slave

NA: Not-acknowledged bit from the master

Blank: Master transmission

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 21

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 0

A

REGISTER ADDRESS (K)

(8 BITS)

MSB LSB

A

A

DATA (K)

(8 BITS)

MSB LSB

AA

MSB LSB

DATA (K+1)

(8 BITS)

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 0

A

UNSUPPORTED REGISTER ADDRESS (K)

(8 BITS)

MSB LSB

A

MAX3301E/MAX3302E RECOGNIZE

THEIR ADDRESS

MAX3301E/MAX3302E SENDS

AN ACK

ACK FROM MASTER

P

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 1

A

DATA (K+3)

(8 BITS)

MSB LSB

ANA

MSB LSB

DATA (K+N)

(8 BITS)

DATA (K+2)

(8 BITS)

MSB LSB

P

P

S

SLAVE ADDRESS

(7 BITS)

A6 A5 A4 A3 A2 A1 A0 1

A

UNSUPPORTED REGISTER ADDRESS (K)

(8 BITS) — ALL 0's RETURNED

MSB LSB

A

R/W

R/W

R/W

R/W

Figure 21. Burst-Mode Read Byte Format

Table 5. I2C Slave Address Map

ADDRESS BITS

ADD INPUT

A

6

A

5

A

4

A

3

A

2

A

1

A

0

GND (0) 0101100

VL (1) 0101101

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

22 ______________________________________________________________________________________

REGISTER

DESCRIPTION

Vendor ID 00h, 01h

Read only. The contents of registers 00h and 01h are 6Ah and 0Bh, respectively.

Product ID 02h, 03h Read only. The contents of registers 02h and 03h are 01h and 33h, respectively.

Control 1

04h (set)

05h (clear)

Sets operating modes, maximum data rate, and direction of data transfer.

Control 2

06h (set)

07h (clear)

Controls D+/D- pullup/pulldown resistor connections, ID_IN state, and V

BUS

behavior.

Interrupt source 08h (read) Read only.

Unused* 09h Not used.

Interrupt latch

0Ah (set)

0Bh (clear)

Indicates which interrupts have occurred.

Interrupt-enable

Falling edge

0Ch (set)

0Dh (clear)

Enables interrupts for high-to-low transitions.

Interrupt-enable

Rising edge

0Eh (set)

0Fh (clear)

Enables interrupts for low-to-high transitions.

Unused*/Special

Function 2

10h (set)

11h (clear)

MAX3301E: Not used.
MAX3302E: Alternate register addresses for special-function register 2. This
register is also accessible from 16h and 17h.

Special function 1

12h (set)

13h (clear)

Enables hardware/software control of the MAX3301E's behavior, interrupt activity,
and operating modes.

Revision ID 14h, 15h Read only. The contents of registers 14h and 15h are 77h and 41h, respectively.

Special function 2

16h (set)

17h (clear)

Sets operating modes, INT output configuration, D+/D- behavior in audio mode,
and TRM source.

Unused* 18h–Fh Not used.

Table 6. Register Map

Burst-Mode Read Byte Format

The MAX3301E/MAX3302E allow a master device to read
data from sequential registers with the burst-mode read
byte protocol (see Figure 21). The master device first
sends the slave address, followed by a 0. The
MAX3301E/MAX3302E then sends an acknowledge bit.
Next, the master sends the register address to the
MAX3301E/MAX3302E, which then generates another
acknowledge bit. The master then sends a stop (P) con­dition to the MAX3301E/MAX3302E. Next, the master
sends a start condition, followed by the MAX3301E/
MAX3302E’s slave address, and then a 1 to indicate a
read command. The MAX3301E/MAX3302E then sends
data to the master device, one byte at a time. The master
sends an acknowledge bit to the MAX3301E/ MAX3302E
after each data byte, and the register address of the
MAX3301E/MAX3302E increments after each byte. This
continues until the master sends a stop (P) condition. If

an unsupported register address is encountered, the
MAX3301E/MAX3302E send a byte of zeros.

Registers

Control Registers

There are two read/write control registers. Control regis­ter 1 (Table 7) sets operating modes, sets the data rate,
and controls the direction of data transfer. Control regis­ter 2 (Table 8) connects the D+/D- pullup or pulldown
resistors, sets the V

BUS

charge/discharge conditions,
and grounds ID_IN. The control registers have two
addresses that implement write-one-set and write-one­clear features for each of these registers. Writing a 1 to
the set address sets that bit to 1. Writing a 1 to the clear
address resets that bit to 0. Writing a 0 to either address
has no effect on the bits.

*When writing to an unused register, the device generates a NACK and the register index does not increment.

MEMORY ADDRESS

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 23

BIT NUMBER

SYMBOL OPERATION

VALUE AT

POWER-UP

0 speed

S et to 0 for l ow - sp eed ( 1.5M b p s) m od e. S et to 1 for ful l - sp eed ( 12M b p s) m od e. Thi s
b i t chang es the d ata r ate onl y i f sp d _susp _ctl = 1 i n sp eci al - functi on r eg i ster 1.

0

1 suspend

Set to 0 for normal operating mode. Set to 1 for suspend mode. This bit changes
the operating mode only if spd_susp_ctl = 1 in sp eci al - functi on r eg i ster 1.

0

2 dat_se0 Set to 0 for VP_VM USB mode. Set to 1 for DAT_SE0 USB mode. 0

3—Not used. 0

4

Enables the transceiver (when configured as an A device) to connect its pullup
resistor if the B device disconnect is detected during HNP. Set to 0 to disable this
feature. Set to 1 to enable this feature.

0

5 oe_int_en

Set to 0 to disable the interrupt output circuitry of OE/INT. Set to 1 to enable the
interrupt output circuitry of OE/INT.

0

6 uart_en

Set to 0 to disable UART mode. Set to 1 to enable UART mode. This bit overrides
the settings of dminus_dir, dplus_dir, and gp_en bits.

0

7—Not used. 0

Table 7. Control Register 1 Description (Write to Address 04h to Set, Write to Address
05h to Clear)

BIT NUMBER

SYMBOL OPERATION

VALUE AT

POWER-UP

0 dp_pullup S et to 0 to d i sconnect the p ul lu p resi stor to D+ . Set to 1 to connect the pul l up r esi stor to D +. 0

1 dm_pullup S et to 0 to d i sconnect the p ul l up r esi stor to D - . S et to 1 to connect the p ul l up r esi stor to D - .0

2

Set to 0 to disconnect the pulldown resistor to D+. Set to 1 to connect the pulldown
resistor to D+.

1

3

Set to 0 to disconnect the pulldown resistor to D-. Set to 1 to connect the pulldown
resistor to D-.

1

4

Set to 0 to allow ID_IN to float. Set to 1 to connect ID_IN to GND. 0

5 vbus_drv

0

6

Set to 0 to disconnect the V

BUS

discharge resistor. Set to 1 to connect the V

BUS

discharge resistor (see Note 8).

0

7 vbus_chrg

Set to 0 to disconnect the V

BUS

charge resistor. Set to 1 to connect the V

BUS

charge resistor (see Note 8).

0

Table 8. Control Register 2 Description (Write to Address 06h to Set, Write to Address
07h to Clear)

Note 8: To prevent a high-current state where the transceiver is both sourcing current to V

BUS

and sinking current from V

BUS

, the fol-

lowing logic is used to set bits 5, 6, and 7 of control register 2:

• Setting vbus_drv clears vbus_dischrg and vbus_chrg

• Setting vbus_dischrg clears vbus_drv and vbus_chrg, unless vbus_drv is set with the same command, in which case vbus_drv
clears the other bits

•Setting vbus_chrg clears vbus_drv and vbus_dischrg, unless either of these bits are set with the same command, as shown in Table 9

bdis_acon_en

dp_pulldown

dm_pulldown

id_pulldown

S et to 0 to tur n V

vbus_dischrg

off. S et to 1 to d r i ve V

B U S

thr oug h a l ow i m p ed ance ( see N ote 8) .

B U S

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

24 ______________________________________________________________________________________

SET COMMAND (ADDRESS 06h) BEHAVIOR OF MAX3301E/MAX3302E

vbus_drv vbus_dischrg vbus_chrg vbus_drv vbus_dischrg vbus_chrg

1XX 1 0 0

01X0 1 0

001 0 0 1

000Not affected Not affected Not affected

Table 9. V

BUS

Control Logic

BIT NUMBER

SYMBOL CONTENTS

0 vbus_vld Logic 1 if V

BUS

> V

BUS

valid comparator threshold.

1 sess_vld Logic 1 if V

BUS

> session valid comparator threshold.

2 dp_hi

Logic 1 if V

D+

> dp_hi comparator threshold (D+ assertion during data line pulsing through

SRP method).

3 id_gnd Logic 1 if V

ID_IN

< 0.1 x VCC.

4 dm_hi

Logic 1 if V

D-

> dm_hi comparator threshold (D- assertion during data line pulsing through SRP

method).

5 id_float Logic 1 if V

ID_IN

> 0.9 x VCC.

6 bdis_acon

Logic 1 if bdis_acon_en = 1 and the MAX3301E/MAX3302E assert dp_pullup after detecting a
B device disconnect during HNP.

7

Log i c 1 i f V

BU S

< sess_end com p ar ator thr eshol d , or i f V

D +

> cr _i nt com p ar ator thr eshol d ( 0.4V to

0.6V ) , d ep end i ng on the val ue of i nt_sour ce ( b i t 5 of sp eci al - functi on r eg i ster 1, see Tab l e 14) .

Table 10. Interrupt Source Register (Address 08h is Read Only)

Interrupt Registers

Four registers control all interrupt behavior of the
MAX3301E/MAX3302E. A source register (Table 10)
indicates the current status of the various interrupt
sources. An interrupt latch register (Table 11) indicates
which interrupts have occurred. An interrupt-enable low
and interrupt-enable high register enable interrupts on
rising or falling (or both) transitions. Tables 10–13 pro­vide the bit configurations for the various interrupt regis­ters. The interrupt latch, interrupt-enable low, and
interrupt-enable high registers have two addresses that
implement write- one-set and write-one-clear features for
each of these registers. Writing a 1 to the set address
sets that bit to 1. Writing a 1 to the clear address resets
that bit to 0. Writing a 0 to either address has no effect
on the bits.

Special-Function Registers

Tables 14, 15, and 16 describe the special-function
registers. The special-function registers have two
addresses that implement write-one-set and write-one­clear features for each of these registers. Writing a 1 to

the set address sets that bit to 1. Writing a 1 to the clear
address resets that bit to 0. Writing a 0 to either
address has no effect on the bits. Special-function reg­ister 1 determines whether hardware or software con­trols the maximum data rate and suspend behavior,
sets the direction of data transfer, and toggles general­purpose buffer mode. Special-function register 2
enables shutdown mode, configures the interrupt out­put as open-drain or push-pull, sets the TRM power
source, and controls the D+/D- connections for audio
mode. Table 15 depicts the special-function register 2
for the MAX3301E and Table 16 depicts the special­function register 2 for the MAX3302E.

The MAX3301E powers up in its lowest power state and
must be turned on by setting the sdwn bit to 0. The
MAX3302E powers up in the operational, VP/VM USB
mode. This allows a µP to use the USB port for power­on boot-up, without having to access I

2

C. To put the

MAX3302E into low-power shutdown, set the sdwn bit
to 0. The MAX3302E also has special-function register
2 mapped to two I2C register addresses. In the
MAX3302E, special-function register 2 can be

X = Don’t care.

cr_int_sess_end

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 25

BIT NUMBER

SYMBOL CONTENTS

VALUE AT

POWER-UP

0 vbus_vld

vb us_vl d asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate
i nter r up t- hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

1 sess_vld

sess_vl d asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate
i nter r up t- hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

2 dp_hi

d p _hi asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate i nter r up t­hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

3 id_gnd

i d _g nd asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate i nter r up t­hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

4 dm_hi

d m _hi asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate i nter r up t­hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

5 id_float

i d _fl oat asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate i nter r up t­hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

6 bdis_acon

b d i s_acon asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate
i nter r up t- hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

7

cr _i nt_sess_end asser ts i f a tr ansi ti on occur s on thi s cond i ti on and the ap p r op r i ate
i nter r up t- hi g h or i nter r up t- l ow enab l e b i t i s set. S ee Tab l es 10, 12, and 13.

0

Table 11. Interrupt Latch Register Description (Write to Address 0Ah to Set, Write to
Address 0Bh to Clear)

BIT NUMBER

SYMBOL CONTENTS

VALUE AT

POWER-UP

0 vbus_vld

S et to 0 to d i sab l e the vb us_vld i nter rup t for a hig h- to- l ow transiti on. S et to 1 to
enab l e the vb us_vld i nter rup t for a hig h- to- l ow transiti on. S ee Tab l es 10 and 11.

0

1 sess_vld

S et to 0 to d i sab l e the sess_vld i nter rup t for a hig h- to- l ow transiti on. S et to 1 to
enab l e the sess_vld i nter rup t for a hig h- to- l ow transiti on. S ee Tab l es 10 and 11.

0

2 dp_hi

S et to 0 to d i sab l e the d p _hi interr up t for a hi g h-to- low tr ansi ti on. Set to 1 to
enab l e the d p _h i interr up t for a hi g h-to- low tr ansi ti on. See Tab l es 10 and 11.

0

3 id_gnd

S et to 0 to d i sab l e the i d _g nd i nter r upt for a hi g h- to-l ow tr ansi tion. S et to 1 to
enab l e the i d _g nd i nter r upt for a hi g h- to-l ow tr ansi tion. S ee Tab les 10 and 11.

0

4 dm_hi

S et to 0 to d i sab l e the d m _hi interr up t for a hi g h-to- low tr ansi ti on. Set to 1 to
enab l e the d m _hi interr up t for a hi g h-to- low tr ansi ti on. See Tab l es 10 and 11.

0

5 id_float

S et to 0 to d i sab l e the i d _fl oat i nter rup t for a hig h- to- l ow transiti on. S et to 1 to
enab l e the i d _fl oat i nter rup t for a hig h- to- l ow transiti on. S ee Tab l es 10 and 11.

0

6 bdis_acon

S et to 0 to d i sab l e the b d is_acon interr up t for a hi g h-to- low tr ansi ti on. Set to 1 to

0

7 cr_int_sess_end

S et to 0 to d i sab l e the cr _i nt_sess_end i nter r up t for a hi g h- to- l ow tr ansi ti on.
S et to 1 to enab l e the cr _i nt_sess_end i nter r up t for a hi g h- to- l ow tr ansi ti on.
S ee Tab l es 10 and 11.

0

Table 12. Interrupt-Enable Low Register (Write to Address 0Ch to Set, Write to Address
0Dh to Clear)

cr_int_sess_end

enab l e the b d is_acon interr up t for a hi g h-to- low tr ansi ti on. See Tab l es 10 and 11.

addressed at I2C register location 10h, 11h (as well as
locations 16h, 17h) to support USB OTG SIE implemen­tations that are limited to I2C register addresses
between 0h and 15h.

ID and Manufacturer Register Address Map

Table 17 provides the contents of the ID registers of the
MAX3301E/MAX3302E. Addresses 00h and 01h com­prise the vendor ID registers. Addresses 02h and 03h
comprise the product ID registers. Addresses 14h and
15h comprise the revision ID registers.

Audio Car Kit

Many cell phones are required to interface to car kits.
Depending upon the car kit, the interface to the phone
may be required to support any or all of the following
functions:

• Audio input

• Audio output

• Charging

• Control and status

D+ and D- of the MAX3301E/MAX3302E go to a high­impedance state when in shutdown mode, allowing
external signals (including audio) to be multiplexed onto
these lines.

External Components

External Resistors

Two external resistors (27.4Ω ±1%) are required for
USB connection. Install one resistor in series between
D+ of the MAX3301E/MAX3302E and D+ of the USB
connector. Install the other resistor in series between D­of the MAX3301E/MAX3302E and D- of the USB con­nector (see the Typical Operating Circuit).

External Capacitors

Five external capacitors are recommended for proper
operation. Install all capacitors as close to the device as
possible. Decouple VLto GND with a 0.1µF ceramic
capacitor. Bypass VCCto GND with a 1µF ceramic
capacitor. Bypass TRM to GND with a 1µF (or greater)
ceramic or plastic capacitor. Connect a 100nF flying
capacitor between C+ and C- for the charge pump (see
the Typical Operating Circuit). Bypass V

BUS

to GND
with a 1µF to 6.5µF ceramic capacitor in accordance
with USB OTG specifications.

ESD Protection

To protect the MAX3301E/MAX3302E against ESD, D+,
D-, ID_IN, and V

BUS

, have extra protection against stat­ic electricity to protect the device up to ±15kV. The ESD
structures withstand high ESD in all states; normal oper-

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

26 ______________________________________________________________________________________

BIT NUMBER

SYMBOL CONTENTS

VALUE AT

POWER-UP

0 vbus_vld

S et to 0 to d i sab l e the vb us_vld i nter rup t for a l ow - to- hi gh transiti on. S et to 1 to
enab l e the vb us_vld i nter rup t for a l ow - to- hi gh transiti on. S ee Tab l es 10 and 11.

0

1 sess_vld

S et to 0 to d i sab l e the sess_vld i nter rup t for a l ow - to- hi gh transiti on. S et to 1 to
enab l e the sess_vld i nter rup t for a l ow - to- hi gh transiti on. S ee Tab l es 10 and 11.

0

2 dp_hi

S et to 0 to d i sab l e the d p _hi i nter r up t for a l ow - to- hi g h tr ansi ti on. S et to 1 to
enab l e the d p _hi i nter r up t for a l ow - to- hi g h tr ansi ti on. S ee Tab l es 10 and 11.

0

3 id_gnd

S et to 0 to d i sab l e the i d _g nd i nter r up t for a l ow - to- hi g h tr ansi ti on. S et to 1 to
enab l e the i d _g nd i nter r up t for a l ow - to- hi g h tr ansi ti on. S ee Tab l es 10 and 11.

0

4 dm_hi

S et to 0 to d i sab l e the d m _hi i nter r up t for a l ow - to- hi g h tr ansi ti on. S et to 1 to
enab l e the d m _hi i nter r up t for a l ow - to- hi g h tr ansi ti on. S ee Tab l es 10 and 11.

0

5 id_float

S et to 0 to d i sab l e the i d _fl oat i nter r up t for a l ow - to- hi g h tr ansi ti on. S et to 1 to
enab l e the i d _fl oat i nter r up t for a l ow - to- hi g h tr ansi ti on. S ee Tab l es 10 and 11.

0

6 bdis_acon

S et to 0 to d i sab l e the b d is_acon interr up t for a low - to- hig h tr ansi ti on. Set to 1 to

0

7 cr_int_sess_end

S et to 0 to d i sab l e the cr _i nt_sess_end i nter r up t for a l ow - to- hi g h tr ansi ti on.
S et to 1 to enab l e the cr _i nt_sess_end i nter r up t for a l ow - to- hi g h tr ansi ti on.
S ee Tab l es 10 and 11.

0

Table 13. Interrupt-Enable High Register (Write to Address 0Eh to Set, Write to Address
0Fh to Clear)

enab l e the b d is_acon interr up t for a low - to- hig h tr ansi ti on. See Tab l es 10 and 11.

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 27

BIT NUMBER

SYMBOL CONTENTS

VALUE AT

POWER-UP

0int_sdwn

S et to 0 for nor m al op er ati on. S et to 1 to enter i nter r up t shutd ow n m od e. The I

2

C

i nter face and i nter r up t sour ces r em ai n acti ve, w hi l e al l other ci r cui tr y i s off.

0

1 spd_susp_ctl

S et to 0 to contr ol the M AX 3301E /M AX3302E b ehavi or w i th S P D and S U S . S et to 1 to
contr ol the M AX 3301E /M AX 3302E b ehavior w i th the sp eed and susp end b i ts i n contr ol
r eg i ster 1 (see Tab l e 7) .

0

2 bi_di

Set to 0 to transfer data from DAT_VP and SE0_VM to D+ and D-, respectively.
DAT_VP and SE0_VM are always inputs when this bit is 0. Set to 1 to control the
direction of data transfer with OE/INT.

1

3 dminus_dir

Set to 0 to transfer data from SE0_VM to D-. Set to 1 to transfer data from D- to
SE0_VM. Ensure that gp_en = 1, dat_se0 = 1, uart_en = 0, and OE/INT = low to
activate this function.

0

4 dplus_dir

Set to 0 to transfer data from DAT_VP to D+. Set to 1 to transfer data from D+ to
DAT_VP. Ensure that gp_en = 1, dat_se0 = 1, uart_en = 0, and OE/INT = low to
activate this function.

0

5 int_source

Set to 0 to use cr_int as the interrupt source for bit 7 of the interrupt source
register. Set to 1 to use sess_end as the interrupt source for bit 7 of the interrupt
source register (see Table 10).

0

6 sess_end

Session end comparator status (read only). Sess_end = 0 when V

BUS

>

sess_end threshold. Sess_end = 1 when V

BUS

< sess_end threshold.

—

7 gp_en

Set to 0 to disable general-purpose buffer mode. Set to 1 to enable general­purpose buffer mode.

0

Table 14. Special-Function Register 1 (Write to Address 12h to Set, Write to Address 13h
to Clear)

BIT NUMBER

SYMBOL CONTENTS

VALUE AT

0 sdwn

Set to 0 for normal operation. Set to 1 to enable shutdown mode. Only the I

2

C

interface remains active in shutdown.

1

1 irq_mode

Set to 0 to set INT and OE/INT as open-drain outputs. Set to 1 to set INT and
OE/INT as push-pull outputs.

0

2

S et to 0 to l eave the D + /D - si ng l e- end ed r ecei ver i np uts connected . S et to 1 to

0

3 reg_sel Set to 0 to power TRM from VCC. Set to 1 to power TRM from V

BUS

.0

4–7 — Reserved. Set to 0 for normal operation. 0000

Table 15. MAX3301E Special-Function Register 2 (Write to Address 16h to Set, Write to
Address 17h to Clear)

ation, suspend mode, interrupt shutdown, and shut­down. For the ESD structures to work correctly, connect
a 1µF or greater capacitor from TRM to GND and from
V

BUS

to GND. ESD protection can be tested in various

ways; the D+, D-, ID_IN, and V

BUS

inputs/outputs are

characterized for protection to the following limits:

•±15kV using the Human Body Model

•±6kV using the IEC 61000-4-2 Contact Discharge

Method

•±10kV using the IEC 61000-4-2 Air-Gap Discharge

Method

Note: sess_end value at power-up is dependent on the voltage at V

BUS

.

xcvr_input_disc

d i sconnect the D + /D - r ecei ver i np uts to r ed uce p ow er consum p ti on i n aud i o m od e.

POWER-UP

MAX3301E/MAX3302E

ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.

Human Body Model

Figure 22 shows the Human Body Model and Figure 23
shows the current waveform it generates when dis­charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a

1.5kΩ resistor.

IEC 61000-4-2

The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment; it does not specifi­cally refer to integrated circuits. The MAX3301E/
MAX3302E helps the user design equipment that meets
level 3 of IEC 61000-4-2, without the need for additional
ESD-protection components. The major difference
between tests done using the Human Body Model and
IEC 61000-4-2 is a higher peak current in IEC 61000-4-2,
due to the fact that series resistance is lower in the IEC
61000-4-2 model. Hence, the ESD-withstand voltage
measured to IEC 61000-4-2 is generally lower than that
measured using the Human Body Model. Figure 24
shows the IEC 61000-4-2 model. The Air-Gap Discharge

test involves approaching the device with a charged
probe. The contact discharge method connects the
probe to the device before the probe is energized.
Figure 25 shows the IEC 61000-4-2 current waveform.

Layout Considerations

The MAX3301E/MAX3302E high operating frequency
makes proper layout important to ensure stability and
maintain the output voltage under all loads. For best
performance, minimize the distance between the
bypass capacitors and the MAX3301E/MAX3302E. Use
symmetric trace geometry from D+ and D- to the USB
connector.

UCSP Applications Information

For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board tech­niques, bump-pad layout, and the recommended reflow
temperature profile, as well as the latest information on
reliability testing results, refer to the Application Note:
UCSP—A Wafer-Level Chip-Scale Package available on
Maxim’s website at www.maxim-ic.com/ucsp.

USB On-the-Go Transceivers and Charge Pumps

28 ______________________________________________________________________________________

BIT NUMBER

SYMBOL CONTENTS

VALUE AT

POWER-UP

0 sdwn

Set to 0 to enable shutdown mode. Set to 1 for normal operation. Only the I

2

C

interface remains active in shutdown.

1

1 irq_mode

Set to 0 to set INT and OE/INT as open-drain outputs. Set to 1 to set INT and
OE/INT as push-pull outputs.

0

2

S et to 0 to l eave the D+ /D - si ng l e-end ed r ecei ver inp uts connected . S et to 1 to
d i sconnect the D + /D- r ecei ver inp uts to r educe p ow er consump ti on i n audi o mod e.

0

3 reg_sel Set to 0 to power TRM from VCC. Set to 1 to power TRM from V

BUS

.0

4–7 — Reserved. Set to 0 for normal operation. 0000

Table 16. MAX3302E Special-Function Register 2 (Write to Address 10h or 16h to Set,
Write to Address 11h or 17h to Clear)

REGISTER ADDRESS CONTENTS

00h 6Ah

Vendor ID

01h 0Bh

02h 01h

Product ID

03h 33h

14h 77h

Revision ID

15h 41h

Table 17. ID Registers

xcvr_input_disc

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 29

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE
RESISTANCE

STORAGE
CAPACITOR

C

s

100pF

R

C

1MΩ

R

D

1.5kΩ

HIGH-

VOLTAGE

DC

SOURCE

DEVICE
UNDER

TEST

Figure 22. Human Body ESD Test Modes

IP 100%

90%

36.8%

t

RL

TIME

t

DL

CURRENT WAVEFORM

PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)

I

r

10%

0

0

AMPERES

Figure 23. Human Body Model Current Waveform

CHARGE-CURRENT-

LIMIT RESISTOR

DISCHARGE

RESISTANCE

STORAGE
CAPACITOR

C

s

150pF

R

C

50MΩ to 100MΩ

R

D

330Ω

HIGH-

VOLTAGE

DC

SOURCE

DEVICE
UNDER

TEST

Figure 24. IEC 61000-4-2 ESD Test Model

I

100%

90%

10%

t

R

= 0.7ns TO 1ns

I

PEAK

60ns

30ns

t

Figure 25. IEC 61000-4-2 Current Waveform

Chip Information

PROCESS: BiCMOS

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

30 ______________________________________________________________________________________

32

31

30

29

28

27

26

9

10

11

12

13

14

15

18192021222324

7654321

MAX3301E

TQFN

(5mm x 5mm)

TOP VIEW

DAT_VP

N.C.

V

CC

N.C.

C-

SE0_VM

EXPOSED PADDLE

GND

8

SDA

C+

V

BUS

VP

V

CC

N.C.

TRM

VM

25

N.C.

D+

D-

ID_IN

GND

ADD

RESET

INT17N.C.

V

L

SPD

16

SUS

RCV

N.C.

OE/INT

SCL

N.C.

MAX3301E/MAX3302E

UCSP

(2.5mm x 2.5mm)

OE/INT

RCV

V

L

SUS

SDA

A

SCL

SPD

INT

RESET

GND

B

SE0_VM

ADD

ID_IN

GND

C-

C

DAT_VP

VP

VM

D-

V

CC

D

V

BUS

V

CC

TRM

D+

C+

E

1

23 45

MAX3302E

TOP VIEW

26

27

25

24

10

9

11

V

CC

C-

SE0_VM

GND

SDA

12

DAT_VP

D-

GND

ADDD+RESET

INT

12

V

CC

4567

2021 19 17 16 15

VP

V

BUS

SPD

RCV

OE/INT

N.C.

N.C.

ID_IN

3

18

28

8

C+

SCL

TRM

23

13

V

L

N.C.

22

14

SUS

VM

EXPOSED PADDLE

TQFN

(4mm x 4mm)

BOTTOM VIEW

Pin Configurations

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 31

MAX3301E
MAX3302E

ASIC

DAT_VP

SE0_VM

RCV

VP

VM

SDA

SCL

SUS

SPD

V

L(I/O)

ADD

GND

TRM

D+

D-

27.4Ω

27.4Ω

ID_IN

V

BUS

C+

C-

OTG

CONNECTOR

V

BUS

D+

D-

ID

GND

V

L

V

CC

V

L

V

CC

*USB OTG SPECIFICATIONS LIMIT
THE TOTAL CAPACITANCE ON V

BUS

FROM 1µF (MIN) TO 6.5µF (MAX)
FOR A DUAL-ROLE DEVICE.

0.1µF

OEV/INT

INT

RESET

1µF

C

FLYING

0.1µF

1µF

C

VBUS

*

4.7µF

Typical Operating Circuit

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

32 ______________________________________________________________________________________

Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

QFN THIN.EPS

D2

(ND-1) X e

e

D

C

PIN # 1
I.D.

(NE-1) X e

E/2

E

0.08 C

0.10 C

A

A1

A3

DETAIL A

E2/2

E2

0.10 M C A B

PIN # 1 I.D.

b

0.35x45°

D/2

D2/2

L

C

L

C

e e

L

CC

L

k

L

L

DETAIL B

L

L1

e

AAAAA

MARKING

I

1

2

21-0140

PACKAGE OUTLINE,
16, 20, 28, 32, 40L THIN QFN, 5x5x0.8mm

-DRAWING NOT TO SCALE-

L

e/2

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

______________________________________________________________________________________ 33

COMMON DIMENSIONS

MAX.

EXPOSED PAD VARIATIONS

D2

NOM.MIN.

MIN.

E2

NOM. MAX.

NE

ND

PKG.

CODES

1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.

2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.

3. N IS THE TOTAL NUMBER OF TERMINALS.

4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL
CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE
OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1
IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.

5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN

0.25 mm AND 0.30 mm FROM TERMINAL TIP.

6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.

7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.

8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.

9. DRAWING CONFORMS TO JEDEC MO220, EXCEPT EXPOSED PAD DIMENSION FOR
T2855-3 AND T2855-6.

NOTES:

SYMBOL

PKG.

N

L1

e

E

D

b

A3

A

A1

k

10. WARPAGE SHALL NOT EXCEED 0.10 mm.

JEDEC

0.70 0.800.75

4.90

4.90

0.25

0.250--

4

WHHB

4

16

0.350.30

5.10

5.105.00

0.80 BSC.

5.00

0.05

0.20 REF.

0.02

MIN. MAX.NOM.

16L 5x5

L

0.30 0.500.40

---

---

WHHC

20

5

5

5.00

5.00

0.30

0.55

0.65 BSC.

0.45

0.25

4.90

4.90

0.25

0.65

--

5.10

5.10

0.35

20L 5x5

0.20 REF.

0.75

0.02

NOM.

0

0.70

MIN.

0.05

0.80

MAX.

---

WHHD-1

28

7

7

5.00

5.00

0.25

0.55

0.50 BSC.

0.45

0.25

4.90

4.90

0.20

0.65

--

5.10

5.10

0.30

28L 5x5

0.20 REF.

0.75

0.02

NOM.

0

0.70

MIN.

0.05

0.80

MAX.

---

WHHD-2

32

8

8

5.00

5.00

0.40

0.50 BSC.

0.30

0.25

4.90

4.90

0.50

--

5.10

5.10

32L 5x5

0.20 REF.

0.75

0.02

NOM.

0

0.70

MIN.

0.05

0.80

MAX.

0.20 0.25 0.30

DOWN
BONDS
ALLOWED

YES3.103.00 3.203.103.00 3.20T2055-3

3.103.00 3.203.103.00 3.20

T2055-4

T2855-3 3.15 3.25 3.35 3.15 3.25 3.35

T2855-6

3.15 3.25 3.35 3.15 3.25 3.35

T2855-4 2.60 2.70 2.80 2.60 2.70 2.80
T2855-5 2.60 2.70 2.80 2.60 2.70 2.80

T2855-7 2.60 2.70

2.80

2.60 2.70 2.80

3.20

3.00 3.10T3255-3 3 3.203.00 3.10

3.203.00 3.10T3255-4 3 3.203.00 3.10

NO

NO
NO

NO

YES
YES

YES

YES

3.203.00T1655-3 3.10 3.00 3.10 3.20 NO
NO3.203.103.003.10T1655N-1 3.00 3.20

3.353.15T2055-5 3.25 3.15 3.25 3.35

YES

3.35

3.15

T2855N-1

3.25 3.15 3.25 3.35

NO

3.353.15T2855-8 3.25 3.15 3.25 3.35

YES

3.203.10T3255N-1 3.00

NO

3.203.103.00

L

0.40

0.40

**
**
**

**

**
**
**
**
**

**
**

**

**

**

SEE COMMON DIMENSIONS TABLE

±0.15

11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.

I

2

2

21-0140

PACKAGE OUTLINE,
16, 20, 28, 32, 40L THIN QFN, 5x5x0.8mm

-DRAWING NOT TO SCALE-

12. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.

3.30T4055-1 3.20 3.40 3.20 3.30 3.40

**

YES

0.050 0.02

0.600.40 0.50

10

-----

0.30

40
10

0.40 0.50

5.10

4.90 5.00

0.25 0.35 0.45

0.40 BSC.

0.15

4.90

0.250.20

5.00 5.10

0.20 REF.

0.70

MIN.

0.75 0.80

NOM.

40L 5x5

MAX.

13. LEAD CENTERLINES TO BE AT TRUE POSITION AS DEFINED BY BASIC DIMENSION "e", ±0.05.

T1655-2

**

YES3.203.103.003.103.00 3.20

T3255-5 YES3.003.103.00

3.20

3.203.10

**

exceptions

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

34 ______________________________________________________________________________________

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

24L QFN THIN.EPS

PACKAGE OUTLINE,

21-0139

2

1

E

12, 16, 20, 24, 28L THIN QFN, 4x4x0.8mm

PACKAGE OUTLINE,

21-0139

2

2

E

12, 16, 20, 24, 28L THIN QFN, 4x4x0.8mm

MAX3301E/MAX3302E

USB On-the-Go Transceivers and Charge Pumps

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 35

© 2006 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.

Package Information (continued)

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages

.)

25L, UCSP.EPS

H

1

1

21-0096

PACKAGE OUTLINE, 5x5 UCSP