描述 Description

The 3.3V Multiple Rate Digital Switch (MT89L86) is pin compatible with MITEL’s 5V MT8986 and retains all of its functionality. This 3.3v device is designed to provide simultaneous non-blocking connections for up to 256 64kb/s channels or blocking connections for up to 512 64kb/s channels. The serial inputs and outputs may have 32 to 128 64kb/s channels per frame with data rates ranging from 2048 up to 8192 kb/s. It also provides per-channel selection between variable and constant throughput delays allowing voice and grouped data channels to be switched without corrupting the data sequence integrity.

特性 Features

? 3.3 volt supply

? 5V tolerant inputs and TTL compatible outputs.

? 256 x 256 or 512 x 256 switching configurations

? 8-bit or 4-bit channel switching capability

? Guarantees frame integrity for wideband channels

? Automatic identification of ST-BUS/GCI interfaces

? Accepts serial streams with data rates of 2.048, 4.096 or 8.192 Mb/s

? Rate conversion from 2.048 Mb/s to 4.096 or 8.192 Mb/s and vice-versa

? Programmable frame offset on inputs

? Per-channel three-state control

? Per-channel message mode

? Control interface compatible to Intel/Motorola CPUs

? Low power consumption

Applications

? Medium size mixed voice and data switching/processing matrices

? Hyperchannel switching (e.g., ISDN H0)

? MVIP? interface functions

? Serial bus control and monitoring

? Centralized voice processing systems

? Voice/Data multiplexer

? ADPCM 32 kbit/s channel switching