75T2091 transceivers equivalent, dtmf transceivers.
April 2000
* DTMF Generator and Receiver on one-chip
* Call progress detection (2090/2091 only)
* Early detect output (2091 only)
* DTMF Receiver exhibi.
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.
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