HT9170 DTMF Receiver

  • Operating Voltage: 2.5V~5.5V
  • OSC Frequency: 3.58MHz
SKU: SLY-IC140 Category:

Product Description

General Description:
  • The HT9170 series are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions.
  • The HT9170B and HT9170D types supply power-down mode and inhibit mode operations.All types of the HT9170 series use digital counting techniques to detect and decode all the 16 DTMF tone pairs into a 4-bit code output.
  • Highly accurate switched capacitor filters are employed to divide tone (DTMF) signals into low and high group signals. A built-in dial tone rejection circuit is provided to eliminate the need for pre-filtering.
  • Technical sheet:
  • Operating voltage: 2.5V~5.5V
  • Minimal external components
  • No external filter is required
  • Low standby current (on power down mode)
  • Excellent performance
  • Tristate data output for µC interface
  • 3.58MHz crystal or ceramic resonator
  • 1633Hz can be inhibited by the INH pin
  • HT9170B: 18-pin DIP package
  • HT9170D: 18-pin SOP package


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