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CM8870 DTMF Decoder


  • PABX
  • Central office
  • Mobile radio
  • Remote control
  • Remote data entry
  • Call limiting
  • Telephone answering systems
  • Paging systems

42.00 45.00

The CAMD CM8870/70C provides full DTMF receiver capability by integrating both the band-split filter and digital decoder functions into a single 18-pin DIP, SOIC, or 20-pin PLCC package. The CM8870/70C is manufactured using state-of-the-art CMOS process technology for low power consumption (35mW, MAX) and precise data handling. The filter section uses a switched capacitor technique for both high and low group filters and dial tone rejection. The CM8870/70C decoder uses digital counting techniques for the detection and decoding of all 16 DTMF tone pairs into a 4-bit code. This DTMF receiver minimizes external component count by providing an on-chip differential input amplifier, clock generator, and a latched three-state interface bus. The on-chip clock generator requires only a low cost TV crystal or ceramic resonator as an external component.

Package includes :

1 x CM8870 DTMF Decoder

Category:

Full DTMF receiver

Less than 35mW power consumption

Industrial temperature range

Uses quartz crystal or ceramic resonators

Adjustable acquisition and release times

18-pin DIP, 18-pin DIP EIAJ, 18-pin SOIC, 20-pin PLCC

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