TP5089 - TP5089 DTMF (TOUCH-TONE) Generator

Product Overview

National Semiconductor

Datasheet Details

Part number	TP5089
Manufacturer	National Semiconductor
File Size	119.91 KB
Description	TP5089 DTMF (TOUCH-TONE) Generator
Datasheet	TP5089 Datasheet
Additional preview pages of the TP5089 datasheet.

Product details

Description

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 s

Features

Y Y Y Y Y Y Y Y Y 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 SINGLE TONE.

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Published: Apr 16, 2005 |