The MT88L70 is a complete 3 Volt, 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. External component count is minimized by
on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.
|Number of Circuits||1|
|Voltage – Supply||2.7 V ~ 3.6 V|
|Current – Supply||2mA|
|Operating Temperature||-40°C ~ 85°C|
|Supplier Device Package||18-SOIC|