Rainbow Electronics MAX3301E User Manual

General Description

The MAX3301E fully integrated USB On-the-Go (OTG)
transceiver and charge pump allows 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 with
an embedded USB host to directly connect to peripher­als such as printers or external hard drives.

The MAX3301E integrates a USB OTG transceiver, a
V

BUS

charge pump, a linear regulator, and an I2C™­compatible, 2-wire serial interface. An internal level
shifter allows the MAX3301E to interface with logic sup­ply voltages from +1.65V to +3.6V. The MAX3301E’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 enables USB OTG communication 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) by controlling
and measuring V

BUS

using internal comparators.
The MAX3301E provides built-in ±15kV electrostatic-

discharge (ESD) protection for the V

BUS

, ID_IN, D+,
and D- terminals. The MAX3301E is available in 5 x 5
chip-scale (UCSP™) and 32-pin (5mm x 5mm x 0.8mm)
thin QFN packages and operates over the extended

-40°C to +85°C temperature range.

Applications

Mobile Phones

PDAs

Digital Cameras

MP3 Players

Photo Printers

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 Pumps 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

♦ Supports Car Kit Interrupts and Audio-Mode

Operation

♦ Supports SRP and HNP
♦ Low-Power Shutdown Mode
♦ Available in 32-Pin Thin QFN and 5 x 5 UCSP

Packages

MAX3301E

USB On-the-Go Transceiver and Charge Pump

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3275; Rev 1; 10/04

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

TEMP

RANGE

PIN­PACKAGE

PKG.

CODE

MAX3301EETJ

32 Thin
QFN-EP*

T3255-4

MAX3301EEBA-T

B25-1

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.

Typical Operating Circuit and Pin Configurations appear at
end of data sheet.

*EP = Exposed paddle.
**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 Reliability Notice in the UCSP Applications
Information section of this data sheet for more information.

-40°C to +85°C

-40°C to +85°C 5 x 5 UCSP

MAX3301E

USB On-the-Go Transceiver and Charge Pump

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 Thin QFN (5mm x 5mm x 0.8mm) (derate 21.3mW/°C

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

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

USB On-the-Go Transceiver and Charge Pump

_______________________________________________________________________________________ 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

USB On-the-Go Transceiver and Charge Pump

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

USB On-the-Go Transceiver and Charge Pump

_______________________________________________________________________________________ 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

TRANSCEIVER 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

USB On-the-Go Transceiver and Charge Pump

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

USB On-the-Go Transceiver and Charge Pump

_______________________________________________________________________________________ 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

USB On-the-Go Transceiver and Charge Pump

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

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

FLYING

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

MAX3301E

USB On-the-Go Transceiver and Charge Pump

_______________________________________________________________________________________ 9

Pin Description

PIN

THIN QFN

NAME FUNCTION

1, 4, 9, 12,

17, 25, 28

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

2D2

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).

3, 29

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.

5C1C-Charge-Pump Flying-Capacitor Negative Terminal

6C2

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).

7, 21

GND Ground

8A1SDA I2C-Compatible Serial Data Interface. Open-drain data input/output.

10 B2 SCL I2C-Compatible Serial Clock Input

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 - . When
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. W hen 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 1, see Tab l e 14) 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 .

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.

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
when the SPD input is disabled.

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.

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 when the
SUS input is disabled.

18 B4 INT

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

19 B5 RESET Active-Low Reset Input. Drive RESET low to asynchronously reset the MAX3301E.

UCSP

DAT_VP

D1, E3

SE0_VM

B1, C5

OE/INT

MAX3301E

USB On-the-Go Transceiver and Charge Pump

10 ______________________________________________________________________________________

Pin Description (continued)

PIN

THIN QFN

NAME FUNCTION

20 C3 ADD I2C-Interface Address Selection Input. (See Table 5.)

22 C4 ID_IN

ID Input. ID_IN is internally pulled up to V

CC

. The state of ID_IN determines ID bits 3 and 5 of

the interrupt source register (see Table 10).

23 D5 D-

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

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.

26 D4 VM

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

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) controls the TRM
power source with software.

30 D3 VP

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

31 E2 V

BUS

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

.

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

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

CL = 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

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

UCSP