DSA0013737.pdf by Holtek

Partial File Text HT9315 Series 15-Memory Tone/Pulse Dialer Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.) Features · Universal specification · Hold-line control · Operating voltage: 2.0V~5.5V
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circuit diagram of keypad interface with dtmf crystal 3.579545MHZ datasheet HT9315 HT9315A HT9315AL HT9315B HT9315C HT9315D HT9315DL KEYPAD CONTROLLED DIGITAL LOCK park distance power amplifier frequency range 300Hz pulse load resistor telephone keypad interface circuit with dtmf tone Dialer 16 number