HT9170 Datasheet | Holtek Semiconductor

HT9170 DTMF Receiver Features - - - - - Operating voltage: 2.5V~5.5V Minimal external ponents No external filter is required Low standby current (on power down mode) Excellent performance - - - - Tristate data output for mC interface 3.58MHz crystal or ceramic resonator 1633Hz can be inhibited by the INH pin HT9170B: 18-pin DIP package HT9170D: 18-pin SOP package General Description The HT9170 series are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions. The H T 9 1 7 0 B a nd H T 9 1 7 0 D t y p es s u p p l y power-down mode and inhibit mode operations. All types of the HT9170 series use digital counting techniques to detect...