MAXIM MAX3349E User Manual

General Description

The MAX3349E ±15kV ESD-protected, USB transceiver
provides a full-speed USB interface to a lower voltage
microprocessor or ASIC. The device supports enumer­ation, suspend, and VBUS detection. A special UART
multiplexing mode routes external UART signals (Rx
and Tx) to D+ and D-, allowing the use of a shared con­nector to reduce cost and part count for mobile
devices.

The UART interface allows mobile devices such as
PDAs, cellular phones, and digital cameras to use either
UART or USB signaling through the same connector.
The MAX3349E features a separate UART voltage sup­ply input to support legacy devices using +2.75V signal­ing. The MAX3349E supports a maximum UART baud
rate of 921kbaud.

Upon connection to a USB host, the MAX3349E enters
USB mode and provides a full-speed USB 2.0-compliant
interface through VP, VM, RCV, and OE. The MAX3349E
features internal series termination resistors on D+ and
D-, and an internal 1.5kΩ pullup resistor to D+ to allow
the device to logically connect and disconnect from the
USB while plugged in. A suspend mode is provided for
low-power operation. D+ and D- are protected from
electrostatic discharge (ESD) up to ±15kV.

The MAX3349E is available in 16-pin TQFN (4mm x
4mm) and 16-bump UCSP™ (2mm x 2mm) packages,
and is specified over the -40°C to +85°C extended tem­perature range.

Applications

Features

♦ ±15kV ESD HBM Protection on D+ and D-
♦ UART Mode Routes External UART Signals to

D+/D-

♦ Internal Linear Regulator Allows Direct Powering

from the USB Cable

♦ Separate Voltage Input for UART

Transmitter/Receiver (V

UART

)

♦ Internal 1.5kΩ Pullup Resistor on D+ Controlled

by Enumerate Input

♦ Internal Series Termination Resistors on D+ and D-
♦ Complies with USB Specification Revision 2.0,

Full-Speed 12Mbps Operation

♦ Built-In Level Shifting Down to +1.4V, Ensuring

Compatibility with Low-Voltage ASICs

♦ V

BUS

Detection

♦ Combined VP and VM Inputs/Outputs
♦ No Power-Supply Sequencing Required
♦ Available in 16-Bump UCSP (2mm x 2mm)

Package

MAX3349E

Hi-Speed USB 2.0 Full-Speed Transceiver

with UART Multiplexing Mode

________________________________________________________________

Maxim Integrated Products

1

19-3952; Rev 1; 5/11

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

Ordering Information

Pin Configurations

UCSP is a trademark of Maxim Integrated Products, Inc.

*

Future product—contact factory for availability.

T = Tape and reel.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

**

EP = Exposed pad.

Cell Phones

PDAs

Digital Cameras

MP3 Players

PART TEMP RANGE PIN-PACKAGE

MAX3349EEBE-T -40°C to +85°C 16 UCSP

MAX3349EEBE+T -40°C to +85°C 16 UCSP

MAX3349EETE* -40°C to +85°C 16 TQFN-EP**

TOP VIEW

BUS

D+

D-

V

12 11 10 9

ENUM

13

*EP

V

TRM

14

V

15

L

VM

16

+

*CONNECT TO GND OR LEAVE UNCONNECTED.

MAX3349E

1234

RX

UART

V

TQFN-EP

(4mm x 4mm)

GND

SUS

8

OE

7

RCV

6

VP

5

TX

BD

TOP VIEW

(BUMPS ON BOTTOM OF DIE)

1

+

V

A

UART

V

L

B

V

C

TRM

D

V

BUS

23

MAX3349E

RX

TX

VM

VP

ENUM

SUS

D+

D-

UCSP

(2mm x 2mm)

4

BD

RCV

OE

GND

MAX3349E

Hi-Speed USB 2.0 Full-Speed Transceiver
with UART Multiplexing Mode

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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 referenced to GND, unless otherwise noted.)
V

UART

, VL, V

BUS

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

V

TRM

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

BUS

+ 0.3V)

VP, VM, SUS, RX, TX, ENUM, RCV, OE, BD, -0.3V to (V

L

+ 0.3V)

Short Circuit Current (D+ and D-)...................................±150mA

Maximum Continuous Current (all other pins) .................±15mA

Continuous Power Dissipation (T

A

= +70°C)

UCSP (derate 8.2mW/°C above +70°C) ....................659.5mW

TQFN (derate 25.0mW/°C above +70°C) ...................2000mW

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 Temperature (soldering, reflow) ............................+235°C

Soldering Temperature (reflow) .......................................+260°C

ELECTRICAL CHARACTERISTICS

(V

BUS

= +3.0V to +5.5V, V

UART

= +2.7V to +3.3V, VL= +1.40V to +2.75V, TA= -40°C to +85°C, unless otherwise noted. Typical val-

ues are at V

BUS

= +5V, VL= +1.8V, V

UART

= +2.75V (UART Mode), and TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SUPPLY INPUTS/OUTPUTS (V

V

Input Range V

BUS

VL Input Range V

V

Input Range V

UART

Regulated Supply-Voltage Output V

Oper at ing V

Oper at ing V

Static V

Supply Current I

BUS

Supply Current I

UART

Supply Current I

UART

Oper at ing VL Supply Current I

Ful l-Speed Idle and SE0 Supply
Current

Static VL Supply Current I

Sharing Mode VL Supply C urrent I

USB Suspend V

BUS

Supply

Current

V

DETECTION (BD)

BUS

USB Power-Supply Detection
Threshold

USB Power-Supply Detection
Hysteresis

VL Power-Supply Detect ion
Threshold

BUS

, V

, V

UART

BUS

UART

TRM

BUS

VUART

VUART(STATIC)

VL

, VL)

TRM

USB mode 3.0 5.5 V

L

4.5V  V

3.0V  V

UART mode 2.7 3.3 V

Internal regulator,
USB mode

Ful l-speed transmitting/receiving at
12Mbps, C

UART transmitting/receiving at
921kbaud, C

UART mode 3.5 5 µA

Ful l-speed transmitting/receiving at
12Mbps, C

Ful l-speed idle,

> +2.7V, V

V

I

VBUS(IDLE)

D+

SE0: VD+ < +0.3V, VD- < +0.3V 340 450

VL(STATIC)

VL(OFF)

I

VBUS(SU S)

V

TH_VBUS

V

HYS_ VBUS

V

TH_VL

Ful l-speed idle, SE0, suspend mode,
or static UART mode

V

BUS

and V

VM, VP unconnected;
OE = 1, SUS = 1

40 mV

0.7 V

 5.5V

BUS

 4.5V

BUS

V

BUS

V

BUS

= 50pF on D+ and D-

L

= 200pF

L

= 50pF on D+ and D-

L

< +0.3V

D-

> 4.5V 3.0 3.6

< 4.5V 2.8 3.6

1.40 2.75 V

10 mA

2.5 mA

6 mA

290 400

2 10 µA

not present 2 5 µA

UART

38 65 µA

0.4 x
V

L

0.9 x
V

L

V

µA

V

MAX3349E

Hi-Speed USB 2.0 Full-Speed Transceiver

with UART Multiplexing Mode

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(V

BUS

= +3.0V to +5.5V, V

UART

= +2.7V to +3.3V, VL= +1.40V to +2.75V, TA= -40°C to +85°C, unless otherwise noted. Typical val-

ues are at V

BUS

= +5V, VL= +1.8V, V

UART

= +2.75V (UART Mode), and TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

V

Power-Supply Detect ion

UART

Threshold

DIGITAL INPUTS/OUTPUTS (VP, VM, RCV, SUS, OE, RX, TX, ENUM, BD)

Input-Voltage Low VIL

Input-Voltage High V

Output-Voltage Low V

Output-Voltage High V

Input Leakage Current I

ANALOG INPUTS/OUTPUTS (D+, D- in USB Mode)

Differential Input Sensitivity V

Differential Common-Mode
Voltage

Single-Ended Input
Low Voltage

Single-Ended Input
High Voltage

USB Output-Voltage Low V

USB Output-Voltage High V

Off-State Leakage Current ILZ -1 +1 µA

Driver Output Impedance Z

Transceiver Capacitance C

Input Impedance ZIN Driver off 1 M

D+ Internal Pullup Resistor RPU ENUM = 1 1425 1500 1575 

ANALOG INPUTS/OUTPUTS (D+, D- in UART Mode)

Input-Voltage High V

Input-Voltage Low V

Output-Voltage High V

V

TH_UART

0.4 x
V

L

0.65 x
V

L

0.9 x
V

L

0.3 x
V

L

0.7 x

IH

OL

OH

LKG

ID

V

CM

V

ILSE

V

IHSE

USB_OLD

USB_OHD

DRV

IND

UART_ IH

UART_ IL

IOL = +2mA, VL > 1.65V

= +1mA, VL < 1.65V

I

OL

IOH = +2m A, VL > 1.65V

= +1m A, VL < 1.65V

I

OH

-1 +1 µA

|VD+ - VD-| 0.2 V

Includes VIDrange 0.8 2.5 V

0.8 V

2.0 V

RL = 1.5k connected to +3.6V 0.3 V

RL = 15k connected to GND 2.8 3.6 V

Steady-state drive 28 43 

Measured from D+/D- to GND 20 pF

UART mode, +2.70 < V

< +2.85V 2.0 V

UART

UART mode,
+2.70V < V

UART

< +2.85V

V

V

L

0.4 V

V

-

L

0.4

V

0.8 V

UART mode,

UART_ OH

+2.70V < V
I

UART_OH

UART

= -2mA

< +2.85V

2.2 V

V

V

Output-Voltage Low V

UART_ OL

UART mode,
+2.70V < V
I

UART_OL

UART

= +2mA

< +2.85V

0.4 V

MAX3349E

Hi-Speed USB 2.0 Full-Speed Transceiver
with UART Multiplexing Mode

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(V

BUS

= +3.0V to +5.5V, V

UART

= +2.7V to +3.3V, VL= +1.40V to +2.75V, TA= -40°C to +85°C, unless otherwise noted. Typical val-

ues are at V

BUS

= +5V, VL= +1.8V, V

UART

= +2.75V (UART Mode), and TA= +25°C.) (Note 1)

TIMING CHARACTERISTICS

(V

BUS

= +3.0V to +5.5V, V

UART

= +2.7V to +3.3V, VL= +1.4V to +2.75V, TA= -40°C to +85°C, unless otherwise noted. Typical values

are at V

BUS

= +5V, VL= +1.8V, V

UART

= +2.75V (UART Mode), and TA= +25°C.) (Note 1)

ESD PROTECTION (D+, D-)

Human Body Model (Figures 9 and 10) ±15 kV

IEC 61000-4-2
Air-Gap Discharge

IEC 61000-4-2
Contact Discharge

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

USB DRIVER CHARACTERISTICS (CL = 50pF)

Rise Time t

Fall Time t

Rise/Fall Time Matching tFR/t

Output Signal Crossover Voltage V

Driver Propagation Delay

Driver Disable Delay

Driver Enable Delay

USB RECEIVER CHARACTERISTICS (CL = 15pF)

Differential Receiver Propagation
Delay

Single-Ended Receiver
Propagation Delay

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

±8 kV

±8 kV

FR

FF

FF

CRS_F

t

PLH_DRV

t

PHL_DRV

t

PHZ_DRV

t

PLZ_DRV

t

PZH_DRV

t

PZL_DRV

t

PLH_RCV

t

PHL_RCV

t

PLH_SE

t

PHL_SE

10% to 90% of | V
(Figures 1 and 7)

90% to 10% of | V
(Figures 1 and 7)

Excluding the first transition from idle
state (Note 2) (Figures 1 and 7)

Excluding the first transition from idle
state (Note 2) (Figure 2)

VL > +1.65V (Figures 2 and 7) 22.5

+1.4V < VL < +1.65V (Figures 2 and 7) 25

VL > +1.65V (Figures 2 and 7) 22.5

+1.4V < VL < +1.65V (Figures 2 and 7) 25

High-to-off transition (Figures 3 and 6) 25

Low-to-off transition (Figures 3 and 6) 25

Off-to-high transition (Figures 3 and 7) 25

Off-to-low transition (Figures 3 and 7) 25

VL > +1.65V (Figures 4 and 8) 25

+1.4V < VL < +1.65V (Figures 4 and 8) 30

VL > +1.65V (Figures 4 and 8) 25

1.4V < VL < +1.65V (Figures 4 and 8) 30

VL > +1.65V (Figures 4 and 8) 28

+1.4V < VL < +1.65V (Figures 4 and 8) 35

VL > +1.65V (Figures 4 and 8) 28

+1.4V < VL < +1.65V (Figures 4 and 8) 35

USB_OHD

USB_OHD

- V

USB_OLD

- V

USB_OLD

|

420ns

|

420ns

90 110 %

1.3 2.0 V

ns

ns

ns

ns

ns

MAX3349E

Hi-Speed USB 2.0 Full-Speed Transceiver

with UART Multiplexing Mode

_______________________________________________________________________________________ 5

TIMING CHARACTERISTICS (continued)

(V

BUS

= +3.0V to +5.5V, V

UART

= +2.7V to +3.3V, VL= +1.4V to +2.75V, TA= -40°C to +85°C, unless otherwise noted. Typical values

are at V

BUS

= +5V, VL= +1.8V, V

UART

= +2.75V (UART Mode), and TA= +25°C.) (Note 1)

Note 1: Parameters are 100% production tested at TA=+25°C, unless otherwise noted. Limits over temperature are guaranteed

by design.

Note 2: Guaranteed by design; not production tested.

Single-Ended Receiver Disable
Delay

Single-Ended Receiver Enable
Delay

UART DRIVER CHARACTERISTICS (CL = 200pF)

Rise Time (D-) t

Fall Time (D-) t

Driver Propagation Delay

UART RECEIVER CHARACTERISTICS (CL = 15pF)

Receiver (Rx) Propagation Delay

Receiver (Rx) Rise/Fall Time

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

High-to-off transition,
V

> +1.65V (Figure 5)

t

PHZ_SE

t

PLZ_SE

t

PZH_SE

t

PZL_SE

FR_TUART

FF_TUART

t

PLH_TUART

t

PHL_TUART

t

PLH_RUART

t

PHL_RUART

t

FR_RUART

t

FF_RUART

L

High-to-off transition,
+1.4V < V

Low-to-off transition,
V

> +1.65V (Figure 5)

L

Low-to-off transition,
+1.4V < V

Off-to-high transition,

> +1.65V (Figure 5)

V

L

Off-to-high transition,
+1.4V < V

Off-to-low transition,

> +1.65V (Figure 5)

V

L

Off-to-low transition,
+1.4V < V

10% to 90% of |V

90% to 10% of |V

(Figure 13) 70 200

(Figure 13) 70 200

(Figure 14) 60

(Figure 14) 60

(Figure 14) 45

(Figure 14) 45

< +1.65V (Figure 5)

L

< +1.65V (Figure 5)

L

< +1.65 (Figure 5)

L

< +1.65V (Figure 5)

L

- V

OHD

OLD

- V

OHD

OLD

10

12

ns

10

12

20

20

ns

20

20

| (Figure 13) 60 200 ns

| (Figure 13) 60 200 ns

ns

ns

ns