MAX3349E 查看數據表（PDF） - Maxim Integrated

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MAX3349E

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

Maxim Integrated 

19-3952; Rev 1; 5/11

Hi-Speed USB 2.0 Full-Speed Transceiver

with UART Multiplexing Mode

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 enumer-

ation, 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 con-

nector 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 sup-

ply input to support legacy devices using +2.75V signal-

ing. 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 tem-

perature range.

Applications

Cell Phones

PDAs

Digital Cameras

MP3 Players

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 (VUART)

♦ 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

♦ VBUS Detection

♦ Combined VP and VM Inputs/Outputs

♦ No Power-Supply Sequencing Required

♦ Available in 16-Bump UCSP (2mm x 2mm)

Package

Ordering Information

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**

*Future product—contact factory for availability.

T = Tape and reel.

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

**EP = Exposed pad.

Pin Configurations

TOP VIEW

12

11

10

9

TOP VIEW

(BUMPS ON BOTTOM OF DIE)

1

2

3

4

+

MAX3349E

ENUM 13

*EP

8 SUS

A

VUART

RX

TX

BD

VTRM 14

VL 15

MAX3349E

VM 16

+

1

2

3

4

TQFN-EP

(4mm x 4mm)

*CONNECT TO GND OR LEAVE UNCONNECTED.

7 OE

6 RCV

5 VP

B

VL

VM

VP

RCV

C

VTRM

ENUM

SUS

OE

D

VBUS

D+

D-

GND

UCSP

(2mm x 2mm)

UCSP is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products 1

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.

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