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

SP490E,49E_0_05243

FEATURES

• +5V Only

• Low Power BiCMOS

• Driver/Receiver Enable (SP49E)

• RS-485 and RS-422 Drivers/Receivers

• Pin Compatible with LTC490 and

SN7579 (SP490E)

• Pin Compatible with LTC49 and

SN7580 (SP49E)

• Improved ESD Specifications:

±5kV Human Body Model

±5kV IEC6000-4-2 Air Discharge

The

SP490E is a low power differential line driver/receiver meeting RS-485 and RS-422

standards up to 0Mbps. The

SP491E is identical to the SP490E with the addition of driver

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

over wide common mode range. The

SP490E is available in 8-pin plastic DIP and 8-pin

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

The

SP491E is available in 4-pin DIP and 4-pin NSOIC packages for operation over the

commercial and industrial temperature ranges.

SP490E

SP491E

DESCRIPTION

BLOCKDIAGRAMS

Now Available in Lead Free Packaging

EnhancedFullDuplexRS-485Transceivers

SP490E/491E