MT8985

CMOS ST-BUSTM Family MT8985 Enhanced Digital Switch Data Sheet Features 256 x 256 channel non-blocking switch Programmable frame integrity for wideband channels Automatic identification of ST-BUS/GCI interface backplanes Per channel tristate control Patented message mode microprocessor interface Single +5 volt supply Available in DIP-40, PLCC-44 and QFP-44 packages Pin compatible with MT8980 device Ordering Information September 2005 www.DataSheet4U.com Non-multiplexed MT8985AE 40 Pin PDIP Tubes MT8985AP 44 Pin PLCC Tubes MT8985AL 44 Pin MQFP Trays MT8985APR 44 Pin PLCC Tape & Reel MT8985AP1 44 Pin PLCC* Tubes MT8985APR1 44 Pin PLCC* Tape & Reel MT8985AE1 40 Pin PDIP* Tubes MT8985AL1 44 Pin MQFP* Trays *Pb Free Matte Tin -40° C to +85 ° C Switch (DX). It is pin compatible with the MT8980D and retains all of the MT8980D's functionality. This VLSI device is designed for switching PCM-encoded voice or data, under microprocessor control, in digital exchanges, PBXs and any ST-BUS/MVIP environment. It provides simultaneous connections for up to 256 64 kb/s channels. Each of the eight serial inputs and outputs consist of 32 64 kbit/s channels multiplexed to form a 2048 kbit/s stream. As the main function in switching applications, the device provides per-channel selection between variable or constant throughput delays. The constant throughput delay feature allows grouped channels such as ISDN H0 to be switched through the device maintaining its sequence integ...