DS14C335 (RS-232 SERIAL PORT DEVICES) +3.3V Supply TIA/EIA-232 3x5 Driver/Receiver +-----------+ V+ |1 +--+ 28| C3+ C2+ |2 27| GND VCC |3 26| C3- C2- |4 25| V- GND |5 24| C1- C1+ |6 23| SD (SHUTDOWN) DIN1 |7 DS14 22| DOUT1 DIN2 |8 C335 21| DOUT2 DIN3 |9 20| DOUT3 ROUT1 |10 19| RIN1 ROUT2 |11 18| RIN2 ROUT3 |12 17| RIN3 ROUT4 |13 16| RIN4 ROUT5 |14 15| RIN5 +-----------+