TP5088 - National Semiconductor

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 inhibited and the device is in a low power idle mode On the low-.

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 power idle mode 3 5V
  – 8V operation Block Diagram TL H 5004
  – 1 Crystal Specification Parallel Resonant 3 579545 MHz RS s 150X L e 100 mH C0 e 5 pF C1 e 0 02 pF C1995 National Semiconductor Corporation TL H 5004 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specif.