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10/15/02

SP3481/3485 Low Power Half-Duplex RS485 Transceivers

© Copyright 2002 Sipex Corporation

SP3481/SP3485

■ RS-485 and RS-422 Transceivers

■ Operates from a single +3.3V supply

■ Interoperable with +5.0V logic

■ Driver/Receiver Enable

■ Low Power Shutdown Mode (SP3481)

■ -7V to +12V Common-Mode Input

Voltage Range

■ Allows up to 32 transceivers on

the serial bus

■ Compatibility with the industry

standard 75176 pinout

■ Driver Output Short-Circuit Protection

8

7

6

5

1

2

3

4

Vcc

B

A

GND

D

R

RO

RE

DE

DI

SP3481 and SP3485

RE

DESCRIPTION

The SP3481 and the SP3485 are a family of +3.3V low power half-duplex transceivers that

meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-

pin compatible with the Sipex SP481, SP483, and SP485 devices as well as popular industry

standards. The SP3481 and the SP3485 feature Sipex's BiCMOS process, allowing low power

operation without sacrificing performance. The SP3481 and SP3485 meet the electrical

specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3481

is equipped with a low power Shutdown mode.

+3.3V Low Power Half-Duplex RS-485

Transceivers with 10Mbps Data Rate

®