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 +-----------+