General Description

The MAX13234E–MAX13237E are +3V to +5.5V pow-

ered EIA/TIA-232 and V.28/V.24 communications inter-

faces with high data-rate capabilities (up to 3Mbps), a

flexible logic voltage interface, and enhanced electro-

static discharge (ESD) protection. All receiver inputs

and transmitter outputs are protected to ±15kV IEC

61000–4-2 Air Gap Discharge, ±8kV IEC 61000-4-2

Contact Discharge, and ±15kV Human Body Model.

The MAX13234E/MAX13235E have two receivers and

two transmitters, while the MAX13236E/MAX13237E

have a single receiver and transmitter. The transmitters

have a low-dropout transmitter output stage, delivering

true RS-232 performance from a +3V to +5.5V supply

based on a dual charge pump. The charge pump

requires only four small 0.1µF capacitors for operation

from a +3.3V supply.

All devices achieve a 1µA supply current using Maxim’s

AutoShutdown Plus™ feature. These devices automati-

cally enter a low-power shutdown mode when the

RS-232 cable is disconnected or the devices driving

the transmitter and receiver inputs are inactive for more

than 30s.

The MAX13234E–MAX13237E are available in space-

saving TQFN and TSSOP packages and operate over

the -40°C to +85°C extended temperature range.

Applications

Features

♦ Data Rate Up to 3Mbps

♦ Low-Voltage Logic Interface

♦ +3V to +5.5V Supply Voltage

♦ AutoShutdown Plus

♦ 1µA Shutdown Current

3Mbps RS-232 Transceivers with

Low-Voltage Interface

________________________________________________________________

Maxim Integrated Products

1

Ordering Information/Selector Guide

19-4343; Rev 0; 10/08

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.

PART

DRIVERS/

RECEIVERS

MAXIMUM

DATA RATE

TEMP RANGE

PIN-PACKAGE

MAX13234EEUP+

2 x 2

250kbps

-40°C to +85°C

20 TSSOP

MAX13234EETP+

2 x 2

250kbps

-40°C to +85°C

20 TQFN-EP*

MAX13235EEUP+

2 x 2

3Mbps

-40°C to +85°C

20 TSSOP

MAX13235EETP+

2 x 2

3Mbps

-40°C to +85°C

20 TQFN-EP*

MAX13236EETE+

1 x 1

250kbps

-40°C to +85°C

16 TQFN-EP*

MAX13237EETE+

1 x 1

3Mbps

-40°C to +85°C

16 TQFN-EP*

Telematics

GPS Systems

Industrial Systems

Portable Devices

Wireless Modules

POS Systems

Communication Systems

Data Cables

AutoShutdown Plus is a registered trademark of Maxim

Integrated Products, Inc.

Functional Diagrams continued at end of data sheet.

+

Denotes a lead-free/RoHS-compliant package.

*

EP = Exposed pad.

Functional Diagrams

T2IN

T1IN

R1OUT

R2OUT

FORCEOFF

FORCEON

READY

C1+

C1-

C2+

C2-

3.0V to 5.5V

V+

V-

GND

RS-232

OUTPUTS

RS-232

INPUTS

TTL/CMOS

OUTPUTS

TTL/CMOS

INPUTS

T1OUT

T2OUT

R1IN

R2IN

MAX13234E

MAX13235E

5k

Ω

5k

Ω

C4

C3

C1

C2