MT8870D Overview
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.
MT8870D Key Features
- plete DTMF Receiver
- Low power consumption
- Internal gain setting amplifier
- Adjustable guard time
- Central office quality
- Power-down mode
- Inhibit mode
MT8870D Applications
- Receiver system for British Tele (BT) or CEPT Spec (MT8870D-1)
