Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com

SP490,49_00_07408

FEATURES

• +5V Only

• Low Power BiCMOS

• Driver/Receiver Enable (SP49)

• RS-485 and RS-422 Drivers/Receivers

• Pin Compatible with LTC490 and

SN7579 (SP490)

• Pin Compatible with LTC49 and

SN7580 (SP49)

The

SP490 is a low power differential line driver/receiver meeting RS-485 and RS-422

standards up to 5Mbps. The

SP491 is identical to the SP490 with the addition of driver and

receiver tri-state enable lines. Both products feature ±200mV receiver input sensitivity, over

wide common mode range. The

SP490 is available in 8-pin plastic DIP and 8-pin NSOIC

packages for operation over the commercial and industrial temperature ranges. The

SP491

is available in 4-pin DIP and 4-pin NSOIC packages for operation over the commercial

and industrial temperature ranges.

SP490

SP491

DESCRIPTION

BLOCKDIAGRAMS

Now Available in Lead Free Packaging

FullDuplexRS-485Transceivers

SP490andSP491