MT8870DE Integrated DTMF Receiver

MT8870DE Integrated DTMF Receiver

The MT8870/CS9370 is a complete DTMF receiver integrating both the band-split 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 tone-pairs into a 4-bit code.
External component count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface. CS9370 is pin to pin compatible with MT8870.
PCB layout or circuit for MT8870 can be replaced with CS9370.
Read datasheet for details of both the IC.

Downloads

•  MT8870 DTMF Audio Decoder Module Datasheet.pdf
•  MT8870 Schematic Diagram.pdf