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SP491EEN-L/TR

Enhanced Full Duplex RS-485 Transceivers

Exar Corporation 

SP490E/491E

Enhanced Full Duplex RS-485 Transceivers

FEATURES

• +5V Only

• Low Power BiCMOS

• Driver/Receiver Enable (SP491E)

• RS-485 and RS-422 Drivers/Receivers

• Pin Compatible with LTC490 and

SN75179 (SP490E)

• Pin Compatible with LTC491 and

SN75180 (SP491E)

• Improved ESD Specifications:

±15kV Human Body Model

±15kV IEC61000-4-2 Air Discharge

Now Available in Lead Free Packaging

DESCRIPTION

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

standards up to 10Mbps. 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 14-pin DIP and 14-pin NSOIC packages for operation over the

commercial and industrial temperature ranges.

BLOCK DIAGRAMS

SP490E

SP491E

Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510)668-7017 • www.exar.com



SP490E,491E_101_052413

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