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.

■+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 IEC1000-4-2 Air Discharge
  ±8kV IEC1000-4-2 Contact Discharge