name: HT9320C function: 22-Memory Tone/Pulse Dialer package: SKDIP22,22 manufacturer: Holtek +--()--+ C8B | 1 22| C7B R1B | 2 21| C6B R2B | 3 20| C5B R3B | 4 19| C4B R4B | 5 18| C3B 45B | 6 17| C2B HKSB | 7 16| C1B MODE | 8 15| POB X1 | 9 14| XMUTEB X2 |10 13| DTMF VDD |11 12| VSS +------+ This pinout came from the Chipdir: http://www.chipdir.org/