MT90820

® CMOS ST-BUS™ FAMILY MT90820 Large Digital Switch (LDX) Advance Information Features 2,048 channel non-blocking switch Maintains frame integrity on concatenated channels. Per-channel selection of minimum or constant throughput delay Serial streams at 2.048, 4.096 or 8.192Mb/s Frame offset delay measurement Programmable frame delay offset Per-channel three-state control Per-channel message mode Control interface compatible to Intel/Motorola CPUs Block programming feature for connection memory ST-BUS/MVIP and GCI interfaces Test Port compatible to IEEE-1149.1 standard ISSUE 1 May 1995 Ordering Information MT90820AP MT90820AL 84 Pin PLCC 100 Pin QFP -40 to +85°C Description The Large Digital Switch (LDX) is an advanced digital switch allowing the users to build up to 2048 channel non-blocking switch. The serial interface can be at 2, 4 or 8 Mb/s compatible to ST-BUS/MVIP/ HMVIP or GCI standards. The LDX can be programmed to provide either minimum or constant throughput delay on all its channels. The device also features three-state control and message mode on per-channel basis. To manage the problem of line delays, each input stream can have an individually programmed input frame offset delay. The offset delay can be calibrated with a dedicated frame measurement facility inside the device. Applications Medium and large switching platforms C.O. switches CTI application Voice/data multiplexer Digital cross connects ST-BUS/HMVIP interfac...