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 SP490with 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.

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 LTC491 and SN7580 (SP49)