DS8922/DS8922A/DS8923/DS8923A
(RS-422/423 LINE DRIVERS AND RECEIVERS)
TRI-STATE RS-422 Dual Differential Line Driver and Receiver Pairs

     +-----------+
 RO1 |1  +--+  16| RI1+
 DI1 |2        15| RI1-
 VCC |3        14| DO1+
/EN1 |4  DS89  13| DO1-
/EN2 |5   22   12| DO2-
 GND |6        11| DO2+
 DI2 |7        10| RI2-
 RO2 |8         9| RI2+
     +-----------+