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IDT728981

IDT
Part Number IDT728981
Manufacturer IDT
Description TIME SLOT INTERCHANGE DIGITAL SWITCH
Published Dec 29, 2006
Detailed Description www.DataSheet4U.com TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128 .EATURES: • • • • • • • • • IDT728981 128 x 128 ch...
Datasheet PDF File IDT728981 PDF File

IDT728981
IDT728981

Overview
www.
DataSheet4U.
com TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128 .
EATURES: • • • • • • • • • IDT728981 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 outputs, each of which consists of 32 channels (64 Kbit/s per channel) to form a multiplexed 2.
048 Mb/s stream.
.
UNCTIONAL DESCRIPTION A functional block diagram of the IDT728981 device is shown below.
The serial streams operate continuously at 2.
048 Mb/s and are arranged in 125µs wide frames each containing 32, 8-bit channels.
Four input (RX0-3) and four output (TX0-3) serial streams are provided in the IDT728981 device allowing a complete 128 x 128 channel non-blocking switch matrix to be constructed.
The serial interface (C4i) clock for the device is 4.
096 MHz.
The received serial data is internally converted to a parallel format by the on chip serial-to-parallel converters and stored sequentially in a 128-position Data Memory.
By using an internal counter that is reset by the input 8 KHz frame pulse, F0i, the incoming serial data streams can be framed and sequentially addressed.
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 .
UNCTIONAL BLOCK DIAGRAM C4i F0i VCC GND ODE Timing Unit RX0 RX1 RX2 RX3 Output MUX TX0 Receive Serial Data Streams Data Memory Control Register Connection Memory Transmit Serial Data Streams TX1 TX2 TX3 Microprocessor Interface 5703 drw01 DS CS R/W A0/ DTA D0/ A5 D7 JANUARY 2001 1  2001 Integrated Device Te...


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