Note: Product Images are shown for illustrative purposes only and may differ from the actual product. MT8870 DTMF Audio/Speech Decoding Telephone Module MT8870 DTMF Decoder Module MT8870 Decoder Module Packaged by:- Sharvi Technologies (OPC) Pvt. Also, another 4 Digital output(ABCD) can use “DTMF Dial” for 12-Digital outputs decode mobile and fixed telephone keys (0-9, * #).Does not require external circuits or wiring, it can be inserted directly into the UNO/MEGA2560/DUE board to use.Onboard LED lights for output state indication complete DTMF Receiver.Onboard LED, it is very convenient to check the output state. The filter section uses switched capacitor techniques for high and low group filters the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code.Type: MT 8870 DTMF Tone Decoding Module.After it received the DTMF signal, it will divide the signal into high-frequency group and low-frequency group and send the signal to the digital decoder which can figure out the key-value then send it to the outside Bus via four lines( Q1, Q2, Q3, Q4) as the binary form. The MT8870 Tone Decoder is a kind of commonly used multi-frequency decode IC product developed by the MITEL company. This detection module interprets the incoming tone and produces a coded output that can be connected to all manner of microcontrollers. This component is ideally suited to adding dual-tone multi-frequency (DTMF) decoding to your project. Can be used to build mobile controlled robots, home automation projects, IVR style applications, etc This module is suitable for modem interfaces, mobile radios, and other DTMF-related applications. You may connect a phone to the module and the module will output the key(0-9, *, #, A, B, C, or D)pressed on the audio source. The DTMF signal in the audio source is decoded and the digital outputs on the module, indicate the key pressed. The module offers a 3.5mm audio connector to connect an audio source. MT8870 DTMF Decoder Module is a very tiny module that is based on MT8870 DTMF decoder ic.

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