DSA0013736.pdf by Holtek

Partial File Text HT9302 Series 1-Memory/2-Memory Tone/Pulse Dialer Patent Number: 64097, 86474, 64529, 113235 (R.O.C.) 5424740 (U.S.A.) Features · Universal specification · Hand-free control · Operating v
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circuit diagram of keypad interface with dtmf datasheet of three pin crystal 3.58MHZ HT16XX HT9302 HT9302A HT9302B HT9302C HT9302D HT9302G power amplifier frequency range 300Hz pulse load resistor