Mt8870 Proteus Lib 35

The MT8870 is designed to decode DTMF signals into their corresponding 4-bit binary codes. DTMF signaling is a method of encoding a dialed number or other information over an analog phone line. When a key is pressed on a telephone keypad, it generates a unique combination of two tones, one from a low-frequency group and one from a high-frequency group. The MT8870 detects these tones and decodes them into digital outputs.

Output Enable: Tie TOE (Pin 10) to +5V.

Input: Connect a signal generator to IN+ (Pin 1). Connect IN- (Pin 2) to GND.

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