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IDT72V8980 Datasheet(PDF) 1 Page - Integrated Device Technology

Part No. IDT72V8980
Description  3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 256 x 256
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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IDT72V8980 Datasheet(HTML) 1 Page - Integrated Device Technology

 
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1
AUGUST 2003
3.3 VOLT TIME SLOT INTERCHANGE
DIGITAL SWITCH
256 x 256
IDT72V8980
2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
DSC-5705/5
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The ST-BUSis a trademark of Mitel Corp.
FUNCTIONAL BLOCK DIAGRAM
Microprocessor Interface
Control Register
Timing
Unit
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
TX0
TX1
TX2
TX3
TX4
TX5
TX6
TX7
ODE
F0i
C4i
VCC
CS
DS
R/
W A0
A5/
GND
CCO
DTA D0/
D5
5705 drw01
Receive
Serial Data
Streams
Data
Memory
Output MUX
Connection
Memory
RESET(1)
Transmit
Serial Data
Streams
FEATURES:
••••• 256 x 256 channel non-blocking switch
••••• Serial Telecom Bus Compatible (ST-BUS®)
••••• 8 RX inputs—32 channels at 64 Kbit/s per serial line
••••• 8 TX output—32 channels at 64 Kbit/s per serial line
••••• Three-state serial outputs
••••• Microprocessor Interface (8-bit data bus)
••••• 3.3V Power Supply
••••• Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 48-pin
Small Shrink Outline Package (SSOP), and 44-pin Plastic Quad
Flatpack (PQFP)
••••• Operating Temperature Range -40
°°°°°C to +85°°°°°C
••••• 3.3V I/O with 5V Tolerant Inputs
DESCRIPTION:
The IDT72V8980 is a ST-BUS® compatible digital switch controlled by a
microprocessor. The IDT72V8980 can handle as many as 256, 64 Kbit/s input
and output channels. Those 256 channels are divided into 8 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.
FUNCTIONAL DESCRIPTION
A functional block diagram of the IDT72V8980 device is shown on below.
The serial ST-BUS® streams operate continuously at 2.048 Mb/s and are
arrangedin125
µswideframeseachcontaining32,8-bitchannels. Eightinput
(RX0-7) and eight output (TX0-7) serial streams are provided in the
IDT72V8980 device allowing a complete 256 x 256 channel non-blocking
switch matrix to be constructed. The serial interface clock (
C4i)forthedevice
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 256-position
DataMemory.Byusinganinternalcounterthatisresetbytheinput8KHzframe
pulse,
F0i, the incoming serial data streams can be framed and sequentially
addressed.
NOTE:
1. The
RESET Input is only provided on the SSOP package.


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