TP5089 DTMF Touch-Tone Generator DIP-16
|Jameco Part no. 32803|
|Catalog 142 , page 6|
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.
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