General Description

The MAX3230E/AE and MAX3231E/AE are +2.5V to

+5.5V powered EIA/TIA-232 and V.28/V.24 communica-

tions interfaces with low power requirements, high data-

rate capabilities, and enhanced electrostatic discharge

(ESD) protection, in a chip-scale package (UCSP™)

and WLP package. All transmitter outputs and receiver

inputs are protected to ±15kV using IEC 1000-4-2 Air-

Gap Discharge, ±8kV using IEC 1000-4-2 Contact

Discharge, and ±15kV using the Human Body Model.

The MAX3230E/AE and MAX3231E/AE achieve a 1µA

supply current with Maxim’s AutoShutdown™ feature.

They save power without changing the existing BIOS or

operating systems by entering low-power shutdown

mode when the RS-232 cable is disconnected, or when

the transmitters of the connected peripherals are off.

The transceivers have a proprietary low-dropout trans-

mitter output stage, delivering RS-232-compliant perfor-

mance from a +3.1V to +5.5V supply, and RS-232-

compatible performance with a supply voltage as low

as +2.5V. The dual charge pump requires only four,

small 0.1µF capacitors for operation from a +3.0V sup-

ply. Each device is guaranteed to run at data rates of

250kbps while maintaining RS-232 output levels.

The MAX3230E/AE and MAX3231E/AE offer a separate

power-supply input for the logic interface, allowing con-

figurable logic levels on the receiver outputs and trans-

provides the MAX3230E/AE and MAX3231E/AE com-

patibility with multiple logic families.

The MAX3231E/AE contains one receiver and one trans-

mitter. The MAX3230E/AE contains two receivers and two

transmitters. The MAX3230E/AE and MAX3231E/AE are

available in tiny chip-scale and WLP packaging and are

specified across the extended industrial (-40°C to +85°C)

temperature range.

Applications

Personal Digital Assistants

Cell-Phone Data Lump Cables

Set-Top Boxes

Handheld Devices

Cell Phones

Features

♦ 6 x 5 Chip-Scale Package (UCSP) and WLP

Package

♦ ESD Protection for RS-232 I/O Pins

±15kV—IEC 1000-4-2 Air-Gap Discharge

±8kV—IEC 1000-4-2 Contact Discharge

±15kV—Human Body Model

♦ 1µA Low-Power AutoShutdown

♦ 250kbps Guaranteed Data Rate

♦ Meet EIA/TIA-232 Specifications Down to +3.1V

♦ RS-232 Compatible to +2.5V Allows Operation

from Single Li+ Cell

♦ Small 0.1µF Capacitors

♦ Configurable Logic Levels

±15kV ESD-Protected +2.5V to +5.5V

RS-232 Transceivers in UCSP and WLP

________________________________________________________________

Maxim Integrated Products

1

MAX3230E/AE

5k

Ω

T2OUT

T2IN

TTL/CMOS

INPUTS

C2-

C2+

C1-

C1+

A1

A5

C1

D1

A2

A3

A6

B6

B1

A4

E3

E4

E2

E1

C5

B5

V-

V+

2.5V TO 5.5V

C4

0.1

μF

C3

0.1

μF

C1

0.1

μF

C2

0.1

μF

0.1

μF

FORCEOFF

FORCEON

INVALID

T1OUT

T1IN

GND

TO POWER-

MANAGEMENT

UNIT

RS-232

OUTPUTS

1.65V TO 5.5V

5k

Ω

R2IN

R2OUT

TTL/CMOS

OUTPUTS

D6

C6

E6

E5

R1IN

R1OUT

RS-232

INPUTS

0.1

μF

Typical Operating Circuits

19-3250; Rev 1; 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.

Ordering Information

PART

TEMP RANGE

BUMP-PACKAGE

MAX3230EEBV-T

-40°C to +85°C

6 x 5 UCSP

MAX3230AEEWV+-T

-40°C to +85°C

6 x 5 WLP

MAX3231EEBV-T

-40°C to +85°C

6 x 5 UCSP

MAX3231AEEWV+-T

-40°C to +85°C

6 x 5 WLP

UCSP is a trademark of Maxim Integrated Products, Inc.

AutoShutdown is a trademark of Maxim Integrated Products, Inc.

Typical Operating Circuits continued at end of data sheet.

Pin Configurations appear at end of data sheet.

+

Denotes a lead-free/RoHS-compliant package.

T = Tape-and-reel.