name: HT93214DLT function: 1-Memory Tone/Pulse Dialer package: SKDIP24,24 manufacturer: Holtek +--()--+ LOCK | 1 24| NC HFOB | 2 23| HFIB HKS | 3 22| R4B MODE | 4 21| R3B X1 | 5 20| R2B X2 | 6 19| R1B VSS | 7 18| C3B VDD | 8 17| C2B DTMF | 9 16| C1B XMUTEB |10 15| POB MODEOB |11 14| KTB DOUT |12 13| CLOCK +------+ This pinout came from the Chipdir: http://www.chipdir.org/