The MSM7590L-01, developed for advanced digital cordless telephone systems, is a single channel ADPCM CODEC IC which performs mutual transcoding between the analog voice band signal and 32 kbps ADPCM serial data. This device includes DTMF Tone and several types of tone generation, transmit/receive data mute and gain control, side-tone path and gain control, and VOX function. Using advanced circuit technology, the device operates from a single 3 V power supply and provide low power consumption.