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DB, DW, OR PW PACKAGE

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EN

C1+

V+

C1−

C2+

C2−

V−

DOUT2

RIN2

ROUT2

PWRDOWN

GND

DOUT1

RIN1

ROUT1

NC

DIN1

DIN2

NC

NC − No internal connection

APPLICATIONS

DESCRIPTION/ORDERING INFORMATION

TRS3222

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV ESD PROTECTION

SLLS815 – JULY 2007

• RS-232 Bus-Pin ESD Protection Exceeds

±15 kV Using Human-Body Model (HBM)

• Meets or Exceeds the Requirements of

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

• Operates With 3-V to 5.5-V V

• Operates up to 250 kbit/s

• Two Drivers and Two Receivers

• Low Standby Current . . . 1 μA Typical

• External Capacitors . . . 4 × 0.1 μF

• Accepts 5-V Logic Input With 3.3-V Supply

• Alternative High-Speed Pin-Compatible Device

(1 Mbit/s)

–

TRSF3222

• Battery-Powered Systems

• PDAs

• Notebooks

• Laptops

• Palmtop PCs

• Hand-Held Equipment

The TRS3222 consists of two line drivers, two line receivers, and a dual charge-pump circuit with

±15-kV ESD

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. The charge pump and four small external capacitors allow operation from a single 3-V to

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

μs driver

output slew rate.

The TRS3222 can be placed in the power-down mode by setting PWRDOWN low, which draws only 1

μA from

the power supply. When the device is powered down, the receivers remain active while the drivers are placed in

and V– is raised toward GND. Receiver outputs also can be placed in the high-impedance state by setting

EN high.

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.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.