HT9172 - DTMF Receiver
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
HT9172 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 o
