Name: GD6532/GD75232 Function: Multiple RS-232 driver/receiver Manufacturer: TI Datasheet: http://www-s.ti.com/sc/ds/gd75232.pdf +--\/--+ VDD |1 20| VCC RA1 |2 19| RY1 RA2 |3 18| RY2 RA3 |4 17| RY3 DY1 |5 16| DA1 DY2 |6 15| DA2 RA4 |7 14| RY4 DY3 |8 13| DA3 RA5 |9 12| RY5 VSS |10 11| GND +------+ name = Lloyd Burt