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 14-pin DIP and 14-pin NSOIC packages for operation over the commercial and industrial temperature ranges.

FEATURES
■+5V Only
■Low Power BiCMOS
■Driver/Receiver Enable (SP491)
■RS-485 and RS-422 Drivers/Receivers
■Pin Compatible with LTC490 and SN75179 (SP490)
■Pin Compatible with LTC491 and SN75180 (SP491)