CM8870 IC DTMF Receiver decoder DIP-18 CM8870

Product Overview

The CM8870/70C is an integrated DTMF receiver that combines band-split filter and digital decoder functions into a single package. Designed using advanced CMOS technology, it provides low power consumption with a maximum of 35mW. The device utilizes switched-capacitor techniques for filtering and digital counting for decoding all 16 DTMF tone pairs into 4-bit codes, while minimizing external component requirements through integrated features like a differential input amplifier, clock generator, and a latched three-state interface bus.

Core Specifications

• Manufacturer: ON Semiconductor

• Function: Integrated DTMF receiver with band-split filter and digital decoder