MT8870DE - DTMF Decoder

PTR001391
4,92 €
Com IVA

MT8870DE - DTMF Decoder

MT8870DE - DTMF Decoder

The MT8870 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code. External component count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.

Detailed Block Diagram (click to enlarge)

Features & Benefits

  • Complete DTMF Receiver
  • Low power consumption
  • Internal gain setting amplifier
  • Adjustable guard time
  • Central office quality
  • Power-down mode
  • Inhibit mode
  • Backward compatible with MT8870C/MT8870C-1
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