©

1993

DATA SHEET

MOS INTEGRATED CIRCUIT

Document No. S12199EJ3V0DS00 (3rd edition)

(Previous No. IC-3280)

Date Published January 1997 N

Printed in Japan

RS-232 LINE DRIVER/RECEIVER AT 3.3 V/5 V

The

µPD4722 is a high-breakdown voltage silicon gate CMOS line driver/receiver based on the EIA/TIA-232-E

standard. The internal DC/DC converter can switch between multiple voltages, allowing it to operate with a single +3.3

V or +5 V power supply. It also provides standby function.

This IC incorporates 4 driver circuits and 4 receiver circuits. An RS-232 interface circuit can be easily configured

by connecting 5 capacitors externally.

FEATURES

•

Conforms to EIA/TIA-232-E (former name, RS-232C) standards

•

•

By setting the standby pin to a low level (standby mode), circuit current can be reduced. At such times, the driver

output is in a high-impedance state.

•

Even in the standby mode, 2 receiver circuits can operate as inverters without hysteresis width.

The other 2 circuits are fixed at a high level.

ORDERING INFORMATION

Part number

Package

µPD4722GS-GJG

30-pin plastic SSOP (300 mil)