SP490 and SP491
Full Duplex RS-485 Transceivers
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)
Now Available in Lead Free Packaging
DESCRIPTION
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.
BLOCK DIAGRAMS
SP490
SP491
SP490,49_00_07408
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com
EXAR [ EXAR CORPORATION ]
