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. Features:- • Complete DTMF Receiver • Low power consumption • Internal gain setting amplifier • Adjustable guard time • Central office quality • Power-down mode • Inhibit mode • Backward compatible with MT8870C/MT8870C-1 Specification:- Symbol Parameter Min Max Units VDD DC Power Supply Voltage 7 V VI Voltage on any pin VSS-0.3 VDD 0.3 V II Current at any pin (other than supply) 10 m A TSTG Storage temperature -65 150 °C PD Package power dissipation 500 m W Related Document:- MT8870 IC Data Sheet
