In most Proteus versions (8.x up to 8.17), the MT8870 is found in:
If the component doesn't show up despite copying the files: mt8870 proteus lib 35
C:\Program Files (x86)\Labcenter Electronics\Proteus X Professional\LIBRARY MT8870.LIB MT8870.IDX into this folder. MT8870 Pin 18 (VDD): +5V MT8870 Pin 9
The MT8870 is a popular DTMF (Dual-Tone Multi-Frequency) decoder chip designed by Mitel (now part of Microsemi). It's widely used in various applications, including telecommunications, IVR (Interactive Voice Response) systems, and other electronic devices that require DTMF signal detection. The MT8870 is a popular DTMF (Dual-Tone Multi-Frequency)
The is a complete Dual Tone Multi-Frequency (DTMF) receiver that integrates both a band-split filter and digital decoder. It is used to identify the "touch tones" produced by phone keypads (0-9, *, #, A-D) and convert them into a 4-bit digital output . Input: Audio signals via a 3.5mm jack or header. Output: A unique 4-bit binary pattern for each key pressed.