MT8870 DTMF Audio/Speech Decoding Telephone Module

₹130 +Tax and Shipping.

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Specifications:

  • Main Chip: MT8870DS
  • Operating Voltage: 5V
  • Power Consumption: Max 500mW
  • Operating Temperature: -40°C to +85°C
  • Board Color: Blue
  • Dimensions: 27mm × 25mm × 10mm
  • Weight: 5g
  • Check Mark Estimated Delivery : Up to 4 business days
  • Check Mark Free Shipping & Returns : On all orders over $200
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The MT8870 DTMF Decoder Module is designed for dual-tone multi-frequency (DTMF) signal processing, commonly used in touch-tone telephone systems. This module decodes incoming DTMF signals into binary-coded outputs, making it an essential component for telecommunication projects, remote control systems, and automation applications.

Built around the MT8870DS chip, this module separates high and low-frequency groups in DTMF signals and outputs the corresponding key values in a 4-bit binary format. It also features onboard LEDs to indicate signal status and an integrated audio input interface for direct connection to telecommunication lines or external audio sources.

Key Features:

  • MT8870DS chip-based DTMF decoder for reliable signal processing.
  • Onboard gain setting amplifier for enhanced signal clarity.
  • Complete DTMF receiver, requiring no additional circuits.
  • Onboard LEDs for easy monitoring of signal states.
  • 5-channel interface for easy integration with microcontrollers.
  • Adjustable guard time for flexible signal detection.
  • Direct audio input via a 3.5mm jack for easy connectivity.
  • Power-down and inhibit modes for optimized power management.
  • *Decodes standard telephone keypad signals (0-9, , #) and additional control outputs (ABCD).

The MT8870 DTMF Decoder Module is an efficient and user-friendly solution for DTMF-based control systems and telecommunications projects. 📞

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