name: HT9200A function: DTMF Generators package: DIP/SOP8,8 manufacturer: Holtek +--()--+ CEB | 1 8| VDD X2 | 2 7| DTMF X1 | 3 6| DATA VSS | 4 5| CLK +------+ This pinout came from the Chipdir: http://www.chipdir.org/