name:         HT9302G
function:     1-Memory/2-Memory Tone/Pulse Dialer
package:      DIP16,16
manufacturer: Holtek

       +--()--+
   C1B | 1  16| R4B
   C2B | 2  15| R3B
   C3B | 3  14| R2B
    X1 | 4  13| R1B
    X2 | 5  12| MODE
XMUTEB | 6  11| DTMF
   VSS | 7  10| POB
   VDD | 8   9| HKSB
       +------+


This pinout came from the Chipdir:
http://www.chipdir.org/