The MT8870 module is a low power device DTMF decoder chip. It is a complete DTMF receiver integrating both the band-split filter and digital decoding functions. This module is suitable for modem interfaces, mobile radios and  other DTMF related applications.

The MT8870 module decodes DTMF signals from an audio source and it is suitable for remote monitoring applications, telephone answering machines and more.

Specifications:

• On-board MT8870 frequency decoder chip
• On-board audio input interface
• On-board LED lights for output state indication
• PCB Size: 26.5 x 24.5 mm