DS36C280
(RS-485 MULTIPOINT LINE DRIVERS, RECEIVERS AND TRANSCEIVERS)
Slew Rate Controlled CMOS EIA-RS-485 Transceiver

       +----------+
    RO |1  +--+  8| VCC
    SR |2        7| DO* RI*
DE RE* |3  DS36  6| DO RI
    DI |4  C280  5| GND
       +----------+