MT8985AP

The MT8985AP is a kind of enhanced digital switch device which is an upgraded version of the popular MT8980D Digital Switch (DX). It is pin compatible with the MT8980D and retains all of the MT8980D's functionality. The MT8985AP is intended for switching PCM-encoded voice or data, under microprocessor control, in digital exchanges, PBXs and any ST-BUS/MVIP environment. The typical applications include: (1)medium size digital switch matrices; (2)hyperchannel switching (e.g., ISDN H0); (3)ST-BUS/MVIPinterface functions; (4)serial bus control and monitoring; (5)centralized voice processing systems; (6)data multiplexer.

There are some features of MT8985AP as follows: (1)256 x 256 channel non-blocking switch; (2)programmable frame integrity for wideband; (3)channels; (4)automatic identification of ST-BUS/GCI interface backplanes; (5)per channel tristate control; (6)patented message mode; (7)non-multiplexed microprocessor interface; (8)single +5 volt supply; (9)available in PLCC-44  package; (10)pin compatible with MT8980 device.

What comes next is about the absolute maximum ratings of MT8985AP: (1)VDD-VSS: -0.3 to 7 V; (2)voltage on digital inputs, VI: VSS-0.3 to VDD+0.3 V; (3)voltage on digital outputs, VO: VSS-0.3 to VDD+0.3 V; (4)current at digital outputs, IO: 40 mA max; (5)storage temperature, TS: -65 to +150; (6)package power dissipation, PD: 2 W. Then is about the recommended operating conditions (voltages are with respect to ground (VSS) unless otherwise stated): (1)operating temperature, TOP: -40 min, 25 typ and +85 max; (2)positive supply, VDD: 4.75 V min, 5.0 V typ and 5.25 V max; (3)input voltage, VI: 0 V min and VDD V max.