Tanotis MT8870 DTMF Voice Decoder Module Telephone/ audio Decoder Speech decoding module Transformers If you need the LEDs

If you need the LEDs

This is the RS232 converter IC that is capable of running at 3V and communicating with 3V logic

Rated Voltage : 12V

Alarm Output : Buzzer

Datasheet (Z0103MN)

Tanotis MT8870 DTMF Voice Decoder Module Telephone/ audio Decoder Speech decoding module Transformers If you need the LEDsMT8870 DTMF Voice Decoder Module Telephone audio Decoder Speech decoding module Features: 1, onboard complex frequency decoder chip MT8870 2, voice input interface board 3, onboard five LED indicators for easy viewing output state 4, the chip have been drawn mainly basic pin 5, PCB size: 26. 5 (mm) x24. 5 (mm) Note: PCB design, VCC pin and GND pin are in the opposite position, please be caution! The VCC pin should be the GND pin , and the GND pin