Description
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
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 Semic.
TP5088 Datasheet
