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MV5089

Part Number	MV5089
Manufacturer	GEC Plessey
Description	DTMF Generator
Published	Aug 19, 2005
Detailed Description	MV5089 MV5089 DTMF GENERATOR DS3126-2.0 June 1993 The MV5089 is fabricated using ISO-CMOS high density technology and...
Datasheet	MV5089 PDF File

Overview

MV5089 MV5089 DTMF GENERATOR DS3126-2.
0 June 1993 The MV5089 is fabricated using ISO-CMOS high density technology and offers low power and wide voltage operation.
An inexpensive 3.
58MHz TV crystal completes the reference oscillator.
From this frequency are derived 8 different sinusoidal frequencies which, when appropriately mixed, provide Dual-Tone Multi-Frequency (DTMF) tones.
Inputs are compatible with a standard 2-of-8 active-low keyboard and the keyboard entries determine the correct division of the reference frequency by the row and column counters.
D-to-A conversion, using R-2R ladder networks, results in a staircase approximation of a sinewave with low total distortion.
Frequency a...

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