Description

This VLSI ISO-CMOS device is designed for switching PCM-encoded voice or data, under microprocessor control, in a modern digital exchange, PBX or Central Office. It provides simultaneous connections for up to 128 64 kbit/s channels. Eachof the four serial inputs and outputs consist of 32 64 kbit/s channels multiplexed to form a 2048 kbit/s ST-BUS stream. In addition, the MT8981 provides microprocessor read and write access to individual ST-BUS channels.

Features

• Zarlink ST-BUS compatible

• 4-line x 32-channel inputs

• 4-line x 32-channel outputs

• 128 ports non-blocking switch

• Single power supply (+5 V)

• Low power consumption: 30 mW Typ.

• Microprocessor-control interface

• Three-state serial outputs