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MT8870 Complete DTMF Receiver
A fully-integrated DTMF receiver with low power consumption and high performance
The MT8870 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. It is backward compatible with MT8870C/MT8870C-1.
- Complete DTMF Receiver: Yes
- Low power consumption: Yes
- Internal gain setting amplifier: Yes
- Adjustable guard time: Yes
- Central office quality: Yes
- Power-down mode: Yes
- Inhibit mode: Yes
- Backward compatibility: MT8870C/MT8870C-1
- DC Power Supply Voltage (VDD): 7 V
- Voltage on any pin (VI): VSS-0.3 to VDD+0.3 V
- Current at any pin (II): 10 mA
- Storage temperature (TSTG): -65 to 150 °C
- Package power dissipation (PD): 500 mW
Related Document: MT8870 IC Data Sheet