SP332CT-L

SP332

RS-232/RS-485 Multi-Mode Serial Transceiver

Description

FEATURES

The SP332 is a monolithic device that contains both RS-232 and RS-485 line drivers and receivers. The configuration of the SP332 can be changed at any time by changing the logic state of two control pins. The device also includes a loop back function which internally connects driver outputs to receiver inputs for a chip self test. An MaxLinear-patented charge pump allows 5V-only operation.

■ ■5V only single supply operation

■ ■Software programmable RS-232 or

RS-485 selection

■ ■4 drivers, 4 receivers RS-232

■ ■2 drivers, 2 receivers RS-485

■ ■Loop back function for self test

■ ■28-pin WSOIC package

The product (or products) mentioned in this data sheet are no longer being manufactured

Ordering Information - Back Page

Typical Applications Circuit

and may not be ordered (OBS)

RS-232 Mode

Full Duplex RS-485 Mode Mode

5V

0.1µF C1+ VCC

0.1µF

12 10

V+

C1-

11

14

0.1µF C2+

13

C2-

SEL A 0V 23

24

SEL A +5V 23

TTL/CMOS 2 SEL B TI1 0V

TTL/CMOS 2 SEL B +5V

LOOPBACK

VCC

TTL/CMOS RS-232 T1 400KΩ VCC

TX2

400KΩ

RS-485