75T2089 Overview
TDK Semiconductor’s 75T2089/2090/2091 are plete 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 are identical to the standard 75T202 device characteristics.
75T2089 Key Features
- DTMF Generator and Receiver on one-chip
- Call progress detection (2090/2091 only)
- Early detect output (2091 only)
- DTMF Receiver exhibits excellent speech immunity
- Analog input range