name: HT819D0 function: 4.2 Second LOG-PCM Speech package: DIP/SOP16,16 manufacturer: Holtek +--()--+ OSC1 | 1 16| OSC2 FLAG1 | 2 15| AUD VSS | 3 14| VDD FLAG2 | 4 13| NC NC | 5 12| NC KEY1 | 6 11| KEY6 KEY2 | 7 10| KEY5 KEY3 | 8 9| KEY4 +------+ This pinout came from the Chipdir: http://www.chipdir.org/