HT9315 Series 15-Memory Tone/Pulse Dialer Patent N.
Holtek Semiconductor Inc
HT9315DL - 15-Memory Tone/Pulse Dialer
HT9315 Series 15-Memory Tone/Pulse Dialer Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.) Features · Universal specification · Operating.