MT8870 DTMF Module

The MT8870 Tone Decoder is a kind of commonly used multi-frequency decode IC product developed by the MITEL company. It is a complete DTMF receiver. 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.

Features:

1. Onboard voice input interface
2. Low power consumption
3. Internal gain setting amplifier
4. Onboard LED, it is very convenient to check the output state.
5. Adjustable guard time
6.  Central office quality
7. Onboard 3.5mm input interface
8. 5 Channel interface
9. On-board MT8870 frequency decoder chip
10. Power-down mode
11. Inhibit mode
12. Onboard audio input interface
13. Onboard LED lights for output state indication Complete DTMF Receiver.
14. Does not require external circuits or wiring, it can be inserted directly into the UNO/MEGA2560/DUE board to use.
15. 12-Digital outputs decode mobile and fixed telephone keys (0-9, * #). Also, another 4 Digital output(ABCD) can use “DTMF Dial” for Software control.

Package Includes:

1 x MT8870 DTMF Module