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.
| Function | DTMF Receiver |
| Interface | – |
| Number of Circuits | 1 |
| Voltage – Supply | 2.7 V ~ 3.6 V |
| Current – Supply | 2mA |
| Power (Watts) | – |
| Operating Temperature | -40°C ~ 85°C |
| Supplier Device Package | 18-SOIC |
