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75T2091

Part Number	75T2091
Manufacturer	TDK
Description	DTMF Transceivers
Published	Apr 25, 2018
Detailed Description	DESCRIPTION TDK Semiconductor’s 75T2089/2090/2091 are complete Dual-Tone Multifrequency (DTMF) Transceivers that can bo...
Datasheet	75T2091 PDF File

Overview

DESCRIPTION TDK Semiconductor’s 75T2089/2090/2091 are complete Dual-Tone Multifrequency (DTMF) Transceivers that can both generate and detect all 16 DTMF tone-pairs.
These ICs integrate the performance-proven 75T202 DTMF receiver with a DTMF generator circuit.
The DTMF receiver electrical characteristics are identical to the standard 75T202 device characteristics.
The DTMF generator provides performance similar to the Mostek MK5380, but with an improved (tighter) output amplitude range specification and with the addition of independent latch and reset controls.
An additional feature of the 75T2090/2091 is "imprecise" call progress detector.
The detector detects the presence of signals i...

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