name: HT12F_DIP18 function: 2**12 Series of Decoders package: DIP18,18 manufacturer: Holtek +--()--+ A0 | 1 18| VDD A1 | 2 17| VT A2 | 3 16| OSC1 A3 | 4 15| OSC2 A4 | 5 14| DIN A5 | 6 13| A11 A6 | 7 12| A10 A7 | 8 11| A9 VSS | 9 10| A8 +------+ This pinout came from the Chipdir: http://www.chipdir.org/ name: HT12F_SOP20 function: 2**12 Series of Decoders package: SOP20,20 manufacturer: Holtek +--()--+ NC | 1 20| NC A0 | 2 19| VDD A1 | 3 18| VT A2 | 4 17| 0SC1 A3 | 5 16| OSC2 A4 | 6 15| DIN A5 | 7 14| A11 A6 | 8 13| A10 A7 | 9 12| A9 VSS |10 11| A8 +------+ This pinout came from the Chipdir: http://www.chipdir.org/