MAX3243

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD (HBM) PROTECTION

SLLS350L − APRIL 1999 − REVISED MARCH 2004

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POST OFFICE BOX 655303

IBM

 PC/AT Serial Port

±15 kV Using Human-Body Model (HBM)

TIA/EIA-232-F and ITU v.28 Standards

250 kbit/s

Output (ROUT2B)

Device (1 Mbit/s)

− SNx5C3243

Outputs When No Valid RS-232 Signal Is

Sensed

− Battery-Powered Systems, PDAs,

Notebooks, Laptops, Palmtop PCs, and

Hand-Held Equipment

description/ordering information

The MAX3243 consists of three line drivers, five line receivers, and a dual charge-pump circuit with

±15-kV ESD

(HBM) protection pin to pin (serial-port connection pins, including GND). The device meets the requirements

of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and

the serial-port connector. This combination of drivers and receivers matches that needed for the typical serial

port used in an IBM PC/AT, or compatible. The charge pump and four small external capacitors allow operation

from a single 3-V to 5.5-V supply. In addition, the device includes an always-active noninverting output

(ROUT2B), which allows applications using the ring indicator to transmit data while the device is powered down.

The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/

µs driver output slew rate.

Copyright

 2004, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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C2+

C2−

V−

RIN1

RIN2

RIN3

RIN4

RIN5

DOUT1

DOUT2

DOUT3

DIN3

DIN2

DIN1

C1+

V+

GND

C1−

FORCEON

FORCEOFF

INVALID

ROUT2B

ROUT1

ROUT2

ROUT3

ROUT4

ROUT5

DB, DW, OR PW PACKAGE

(TOP VIEW)

AT, IBM, and PC are trademarks of International Business Machines Corporation.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.