This VLSI ISO-CMOS device is designed forswitching PCM-encoded voice or data, undermicroprocessor control, in a modern digitalexchange, PBX or Central Office. It providessimultaneous connections for up to 256 64 kbit/schannels. Each of the eight serial inputs and outputsconsist of 32 64 kbit/s channels multiplexed to form a2048 kbit/s ST-BUS stream. In addition, the MT8980provides microprocessor read and write access toindividual ST-BUS channels. Корпус DIP-40.