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HT9172

Holtek Semiconductor
Part Number HT9172
Manufacturer Holtek Semiconductor
Description DTMF Receiver
Published Oct 20, 2006
Detailed Description Features · Operating voltage: 2.5V~5.5V · Minimal external component requirements · No external filter required · Low st...
Datasheet PDF File HT9172 PDF File

HT9172
HT9172

Overview
Features · Operating voltage: 2.
5V~5.
5V · Minimal external component requirements · No external filter required · Low standby current in power down mode) · Excellent performance HT9172 DTMF Receiver · Tristate data output for MCU interface · 3.
58MHz crystal or ceramic resonator oscillator · 1633Hz can be inhibited by the INH pin · 18-pin DIP/SOP packaging General Description The HT9172 is a Dual Tone Multi Frequency (DTMF) receiver device which includes an integrated digital decoder and band split filter functions as well as power-down and inhibit mode operations.
The device uses digital counting techniques to detect and decode the full range of 16 DTMF tone pairs into a 4-bit code output...


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