MT88L70 Overview
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.
MT88L70 Key Features
- 3.6 volt operation plete DTMF receiver Low power consumption Internal gain setting amplifier Adjustable guard time Centr