MT8981D

Features:

• Zarlink ST-BUS compatible
• 4-line x 32-channel inputs
• 4-line x 32-channel outputs
• 128 ports non-blocking switch
• Single power supply (+5 V)
• Low power consumption: 30 mW Typ.
• Microprocessor-control interface
• Three-state serial outputs


Pinout




Specifications

Parameter	Symbol	Min.	Max.	Units
VDD - VSS		-0.3	7	V
Voltage on Digital Inputs	VI	Vss-0.3	VDD+0.3	V
Voltage on Digital Outputs	Vo	Vss-0.3	VDD+0.3	V
Current at Digital Outputs	Io		40	mA
Storage Temperature	Ts	-65	+150	°C
Package Power Dissipation	PD		2	W

Description

This VLSI ISO-CMOS device MT8981D is designed for switching PCM-encoded voice or data, under microprocessor control, in a modern digital exchange, PBX or Central Office. It provides simultaneous connections for up to 128 64 kbit/s channels. Each of the four serial inputs and outputs consist of 32 64 kbit/s channels multiplexed to form a 2048 kbit/s ST-BUS stream. In addition, the MT8981D provides microprocessor read and write access to individual ST-BUS channels.