MT8870 DTMF Voice Decoding Module
The MT8870 DTMF Decoding Module is a compact and efficient device designed to decode Dual Tone Multi-Frequency (DTMF) signals from audio inputs, such as those generated by pressing keys on a telephone or mobile phone keypad.
This module converts DTMF tones into corresponding digital outputs, making it ideal for applications in robotics, home automation, and security systems requiring remote control via telephone. Built around the reliable MT8870 IC, it ensures accurate decoding of all 16 standard DTMF tones (0-9, A-D, *, #).
Features :
- Based on the MT8870 DTMF decoder IC.
- Onboard 3.5mm audio jack for easy connection to audio sources.
- Decodes all 16 DTMF tones (0-9, A-D, *, #).
- 5-channel digital output interface (Q1-Q4, StQ).
- LED indicators for output status.
- Compact size: 26mm x 25mm x 12mm.
- Operating voltage: 5VDC.
- Low power consumption.
Specifications :
| Parameter | Details |
|---|---|
| Decoder IC | MT8870 |
| Input | 3.5mm audio jack |
| Output | 5 digital outputs (Q1-Q4: binary outputs, StQ: delayed steering output) |
| Power Supply | 5VDC |
| Current Consumption | less than 10mA |
| Dimensions | 26mm x 25mm x 12mm |
| Pinout | Q1-Q4: Binary outputs StQ: Indicates valid tone detection IN: Inhibit input VCC: Power supply input GND: Ground |
| Operating Temperature | -40°C to +85°C |
Applications :
- Remote control of robots via mobile phone.
- Home automation systems controlled by telephone.
- Security systems with telephone-based access control.
- Interactive voice response systems (IVRS).
- Telephone-based data entry systems.
- Remote monitoring and control applications.
Package Content :
- 1 x MT8870 DTMF Voice Decoding Module
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