name:         UM95089
function:     Dual Tone Multifrequency Dialer
package:      DIP16,16
manufacturer: 
added-by:     Wade Fincher

             +--()--+
         Vcc | 1  16| Tone Output
Tone Disable | 2  15| Single Tone Inhibit
Column Input | 3  14| Row Input
Column Input | 4  13| Row Input
Column Input | 5  12| Row Input
      Ground | 6  11| Row Input
   OSC Input | 7  10| Any Key Down
  OSC Output | 8   9| Column Input
             +------+

This information was added by a third party and may be incorrect.

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