DS14C239
(RS-232 SERIAL PORT DEVICES)
Dual Supply TIA/EIA-232 3x5 Driver/Receiver

      +-----------+
ROUT1 |1  +--+  24| DIN1
 RIN1 |2        23| DIN2
  GND |3        22| ROUT2
  VCC |4        21| RIN2
   V+ |5        20| DOUT2
   C+ |6  DS14  19| DOUT1
   C- |7  C239  18| RIN3
   V- |8        17| ROUT3
 RIN5 |9        16| DIN3
ROUT5 |10       15| NC
ROUT4 |11       14| /EN
 RIN4 |12       13| DOUT3
      +-----------+