Product Summary

The MT89L85AP is an Enhanced Digital Switch device upgraded 3-volt version of the MT8985 Digital Switch. It is pin compatible with the MT8985 and retains all of the MT8985’s functionality. The enhanced digital swtich is designed for switching PCM-encoded voice or data, under microprocessor control, in digital exchanges, PBXs and any ST-BUS/MVIP environment. The applications of the MT89L85AP include Medium size digital switch matrices, Hyperchannel switching (e.g., ISDN H0), ST-BUS/MVIP interface functions, Serial bus control and monitoring, Centralized voice processing systems, Data multiplexer.

Parametrics

MT89L85AP absolute maximum ratings: (1)VDD - VSS: -0.3 to 5.0 V; (2)Voltage on Digital Inputs, VI: VSS-0.3 to VDD+0.3 V; (3)Current at Digital Outputs, IO: 20 mA; (4)Storage Temperature, TS: -55 to +125℃; (5)Package Power Dissipation, PD: 1W.

Features

MT89L85AP features: (1)3.3 volt supply; (2)5V tolerant inputs and TTL compatible outputs; (3)256 x 256 channel non-blocking switch; (4)Programmable frame integrity for wideband channels; (5)Automatic identification of ST-BUS/GCI interface backplanes; (6)Per channel tristate control; (7)Patented message mode; (8)Non-multiplexed microprocessor interface; (9)Available in PLCC-44 and SSOP-48 packages; (10)Pin compatible with MT8985 device; (11)Low power consumption.

Diagrams

MT89L85AP block diagram