MT8870
Features
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- - plete DTMF Receiver Low power consumption Internal gain setting amplifier Adjustable guard time Central office quality Power-down mode Inhibit mode Backward patible with MT8870C/MT8870C-1
ISSUE 3
May1995
Ordering Information MT8870DE/DE-1 18 Pin Plastic DIP MT8870DC/DC-1 18 Pin Ceramic DIP MT8870DS/DS-1 18 Pin SOIC MT8870DN/DN-1 20 Pin SSOP MT8870DT/DT-1 20 Pin TSSOP -40 °C to +85 °C
Description
The MT8870D/MT8870D-1 is a plete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tonepairs into a 4-bit code. External ponent count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.
Applications
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- Receiver system for British Tele (BT) or CEPT Spec (MT8870D-1) Paging systems Repeater...
