IDT728981

Features:

• 128 x 128 channel non-blocking switch
• Serial Telecom Bus Compatible (ST-BUS^®)
• 4 RX inputs-32 channels at 64 Kbit/s per serial line
• 4 TX output-32 channels at 64 Kbit/s per serial line
• Three-state serial outputs
• Microprocessor Interface (8-bit data bus)
• 5V Power Supply
• Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 40-pin
  Plastic Dip (P-DIP) and 44-pin Plastic Quad Flatpack (PQFP)
• Operating Temperature Range -40°C to +85°C


Pinout




Specifications

Symbol	Parameter	Min.	Max.	Unit
	VCC - GND	-0.3	7	V
Vi	Voltage on Digital Inputs	GND - 0.3	VCC +0.3	V
VO	Voltage on Digital Outputs	GND - 0.3	VCC +0.3	V
IO	Current at Digital Outputs		40	mA
TS	Storage Temperature	-65	+150	° C
PD	Package Power Dissapation		2	W

NOTE:
1. Exceeding these values may cause permanent damage. Functional operation
    under these conditions is not implied.


Description

The IDT728981 is a ST-BUS^® compatible digital switch controlled by a microprocessor. The IDT728981 can handle as many as 128, 64 Kbit/s input and output channels. Those 128 channels are divided into 4 serial inputs and outputs, each of which consists of 32 channels (64 Kbit/s per channel) to form a multiplexed 2.048 Mb/s stream.