While standard Proteus versions may lack a native, fully functional MT8870 model, provides the necessary .LIB and .IDX files to bridge this gap.
Since the MT8870 is not native, you must import a third-party library. Here is the safe, functional method to add the DTMF decoder. mt8870 proteus lib 35
Once the library is installed, follow these steps to build your simulation: Components Needed: (from your new library) 3.579545 MHz Crystal Oscillator (Critical for timing) Resistors & Capacitors (for the input filter and gain) While standard Proteus versions may lack a native,
button in the schematic capture and search for "MT8870" to add it to your project. Practical Simulation Tips Mt8870 Proteus Lib 35 - Facebook fully functional MT8870 model