XD-61 DTMF MT8870 Voice Decoding Module

The XD-61 DTMF MT8870 Voice Decoding Module is a reliable Dual-Tone Multi-Frequency (DTMF) decoder based on the MT8870 IC. It is widely used for decoding telephone keypad tones or remote control signals in embedded systems. The module converts audio tone inputs into 4-bit digital outputs, making it ideal for telephone interfacing, audio-controlled robotics, and remote switching systems. 

Key Features of XD-61 DTMF MT8870 Voice Decoding Module: 

• MT8870 IC Based: Reliable tone decoding using industry-standard MT8870.

• 4-Bit Output: Converts DTMF tones to 4-bit binary data.

• Built-in Band Split Filter: Separates high and low group tones efficiently.

• LED Indicator: Shows valid tone detection visually.

• Onboard Audio Input Jack: Easy connection with audio sources. 

Technical Specifications of XD-61 DTMF MT8870 Voice Decoding Module: 
• IC Used: MT8870 DTMF Decoder • Operating Voltage: 3.5V to 5.5V DC

• Frequency Detection Range: 697 Hz to 1633 Hz

• Output Format: 4-bit binary (91 to Q4)

• Valid Tone Output: LED and StD (Delayed Steering Output)

• Audio Input: 3.5mm jack or onboard mic header 

Mechanical Specifications of XD-61 DTMF MT8870 Voice Decoding Module: 
• PCB Dimensions: 38mm x 22mm

• Mounting Holes: 4x M2 holes for easy enclosure mounting

• Connectors: Header pins for power and data output

• Indicator: Power and Tone Detected LEDs