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 a 4-bit code output. Highly accurate switched capacitor Filters are utilised to divide the DTMF dual Tone frequencies into low and high group signals. An integrated dial Tone rejection circuit is provided to eliminate the need for pre-filtering.
By Holtek Semiconductor Inc.
HT9172 's PackagesHT9172 's pdf datasheet

HT9172 Pinout, Pinouts
HT9172 pinout,Pin out
This is one package pinout of HT9172,If you need more pinouts please download HT9172's pdf datasheet.

HT9172 Application circuits
HT9172 circuits
This is one application circuit of HT9172,If you need more circuits,please download HT9172's pdf datasheet.

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