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TP5089

Part Number	TP5089
Manufacturer	National Semiconductor
Description	TP5089 DTMF (TOUCH-TONE) Generator
Published	Apr 16, 2005
Detailed Description	TP5089 DTMF(TOUCH-TONE) Generator December 1991 TP5089 DTMF (TOUCH-TONE) Generator General Description The TP5089 is a...
Datasheet	TP5089 PDF File

Overview

TP5089 DTMF(TOUCH-TONE) Generator December 1991 TP5089 DTMF (TOUCH-TONE) Generator General 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 state when any key is depressed is also provided Features Y Y Y Y Y Y Y Y Y 3 5V – 10V operati...

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