MT8870 DTMF Speech Decoding Module Telephone Module ccmcall control
Separate analog, digital, and IO power supply
Serial data and control interface (SPI)
1 headphone and audio output interface
1 microphone for recording, support audio encoding format
1 line input interface; supports MP3 and WAV stream
Power indicator light
On-board 3.3 V and 2.5 V LDO chip AMS-1117, maximum current of 800 mA
Single Power Supply: +5 VDC, capacitor filter
12.288 MHz crystal
- DTMF Voice Decoder MT8870 DTMF Voice Decoder Modul Telephone Audio Speech Phone Module DTMF Voice Decoder
- onboard MT8870 complex frequency decoder chip
- onboard voice input interface
- onboard 5 LED lights, easy to view the output status
- the main chip has been the main pin leads
- PCB size: 26.5 (mm) x24.5 (mm)
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