DTMF SPEECH DECODING MODULE MT8870

Description

The DTMF Speech Decoding Module MT8870 is a highly reliable module designed to decode DTMF (Dual Tone Multi-Frequency) signals commonly used in telephone communication systems. It efficiently converts the received tone signals into 4-bit binary outputs, making it ideal for remote control, telecommunication interfaces, and embedded system applications. Built around the MT8870 decoder IC, this module ensures accurate signal detection and decoding, even in noisy environments, and is widely used in DIY electronics, robotics, home automation, and security projects.

Features:

Accurate DTMF Decoding – Converts tone signals from telephones or audio sources into 4-bit binary output. Wide Application – Suitable for telephone remote control, security systems, robotics, and automation projects.

DTMF SPEECH DECODING MODULE

MT8870 Decoder Chip – Ensures stable and reliable decoding performance. Onboard LED Indicators – Visual indication of signal detection and output status.Simple Interface – Easy to connect with microcontrollers like Arduino, PIC, or Raspberry Pi.

Specifications

Working voltage: 5V Power Consumption: 500MW(MAX)r: 500 mw (MAX) On-board voice input interface On-board LED, it is very convenient to check the output state. Onboard 5 x LED indicators for easy viewing output state

Operating Temperature : -40-+85 °C IO Drive : Current Maximum 10mA. PCB Size : 25.4×25.4MM This decoding module is for mobile and fixed telephone voice dialing decoding functionDesigned specifically for ARDUINO Board. Can also be used for other MCUs(AVR PIC MSP430 STM32 ARM7/9/10/11 FPGA/CPLD)

Low power consumption Internal gain setting amplifier Onboard 3.5mm input interface 5 Channel interface On-board MT8870 frequency decoder chipDoes not require external circuits or wiring, it can be inserted directly into the UNO/MEGA2560/DUE board to use. 12-Digital outputs decode mobile and fixed telephone keys (0-9, * #). Also, another 4 Digital output(ABCD) can use “DTMF Dial” for Software control.