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HT9172 - DTMF Receiver

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.

Key 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.

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Other Datasheets by Holtek Semiconductor

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HT9205C 5-Memory/6-Memory Tone/Pulse Dialer
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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.