HT9170 Dual Tone (DTMF) Receiver

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HT9170 Dual Tone (DTMF) Receiver [Copy link]

The HT9170 series is a dual-audio DTMF receiver that integrates digital decoder and multi-band filter functions. Both HT9170B and HT9170D
can work in power-down mode and suppression mode. All models of the HT9170 series are identified by digital calculation methods. The 16-fold DTMF
audio is decoded and converted into a 4-bit code output. The high-precision conversion capacitor filter separates the audio DTMF signal into low-frequency and
high- frequency signals. The built-in dial audio blocking circuit can omit the blocking circuit required by the pre-filter.