
MT8870 DTMF Decoder IC: Pinout, Working, Features, and Applications Explained
MT8870 is a popular DTMF decoder IC that converts dual-tone signals into digital outputs with high accuracy. Widely used in telecommunication systems, remote control circuits, and security devices, it offers reliable tone detection and decoding. This article covers the MT8870 pinout, working principle, features, and circuit applications to help students, engineers, and hobbyists understand its role in electronic projects.