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TP5089 DTMF Touch-Tone Generator DIP-16

TP5089N: MAJOR BRANDS View Larger Image
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Jameco Part no. 32803
Manufacturer   MAJOR BRANDS
Manufacturer no. TP5089N
Catalog 152 , page 4
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TP5089 DTMF Touch-Tone Generator DIP-16

The TP5089 is a low threshold voltage, field-implanted, metal gate CMOS integrated circuit. It interfaces directly to a standard telephone keypad and generates all dual tone multi-frequency pairs required in tone-dialing systems. The tone synthesizers are locked to an on-chip reference oscillator using an inexpensive 3.579545 MHz crystal for high tone accuracy. The crystal and an output load resistor are the only external components required for tone generation. A MUTE OUT logic signal, which changes state when any key is depressed, is also provided.


  • 3.5V ±10V operation when generating tones
  • 2V operation of keyscan and MUTE logic
  • Static sensing of key closures or logic inputs
  • On-chip 3.579545 MHz crystal-controlled oscillator
  • Output amplitudes proportional to supply voltage
  • High group pre-emphasis
  • Low harmonic distortion
  • Open emitter-follower low-impedance output

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