TP5088 Datasheet (National Semiconductor) - TP5088 DTMF Generator for Binary Data

TP5088, TP5088 DTMF Generator for Binary Data

This CMOS device provides low cost tone-dialing capability in microprocessor-controlled telephone applications 4-bit binary data is decoded directly without the need for conversion to simulated keyboard inputs required by standard DTMF generators With the TONE ENABLE input low the oscillator is inhi

TP5088 Features

* Y Y Y Y Y Y Y Y Y Y Direct microprocessor interface Binary data inputs with latches Generates 16 standard tone pairs On-chip 3 579545 MHz crystal-controlled oscillator Better than 0 64% frequency accuracy High group pre-emphasis Low harmonic distortion MUTE output interfaces to speech network Low p