name: HT6222 function: Multi-Purpose Encoders package: DIP/SOP24,24 manufacturer: Holtek +--()--+ R3 | 1 24| R2 R4 | 2 23| R1 R5 | 3 22| AIN R6 | 4 21| C1 R7 | 5 20| C2 R8 | 6 19| C3 DOUT | 7 18| C4 VDD | 8 17| C5 D7 | 9 16| C6 X2 |10 15| C7 X1 |11 14| C8 VSS |12 13| LED +------+ This pinout came from the Chipdir: http://www.chipdir.org/