name:         HT93214AL
function:     1-Memory Tone/Pulse Dialer
package:      DIP18,18
manufacturer: Holtek

       +--()--+
  LOCK | 1  18| NC
  HKSB | 2  17| R4B
  MODE | 3  16| R3B
    X1 | 4  15| R2B
    X2 | 5  14| R1B
   VSS | 6  13| C3B
   VDD | 7  12| C2B
  DTMF | 8  11| C1B
XMUTEB | 9  10| POB
       +------+


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