IDT72V8981PA IDT, Integrated Device Technology Inc, IDT72V8981PA Datasheet

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IDT72V8981PA

Manufacturer Part Number
IDT72V8981PA
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet

Specifications of IDT72V8981PA

Lead Free Status / RoHS Status
Not Compliant
microprocessor. The IDT72V8981 can handle as many as 128, 64 Kbit/s input
NOTE:
1. The RESET Input is only provided on the TSSOP package.
2001 Integrated Device Technology, Inc.
The IDT72V8981 is a ST-BUS
RX0
RX1
RX2
RX3
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)
3.3V Power Supply
Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 48-pin
Plastic Small Outline (TSSOP) and 44-pin Plastic Quad
Flatpack (PQFP)
Operating Temperature Range -40 C to +85 C
Serial Data
Receive
Streams
®
compatible digital switch controlled by a
Memory
Data
3.3 VOLT TIME SLOT INTERCHANGE
DIGITAL SWITCH
128 x 128
®
)
DS
Microprocessor Interface
C4i
Timing
CS
Control Register
Unit
R/W A0/
F0i
A5
1
V
CC
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.
serial streams operate continuously at 2.048 Mb/s and are arranged in 125 s
wide frames each containing 32, 8-bit channels. Four input (RX0-3) and four
output (TX0-3) serial streams are provided in the IDT72V8981 device allowing
a complete 128 x 128 channel non-blocking switch matrix to be constructed.
The serial interface clock (C4i) for the device is 4.096 MHz.
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.
DTA D0/
A functional block diagram of the IDT72V8981 device is shown below. The
The received serial data is internally converted to a parallel format by the
GND
D7
Output MUX
Connection
RESET
Memory
(1)
Serial Data
Transmit
Streams
ODE
5702 drw01
IDT72V8981
DSC-5702/1
TX0
TX1
TX2
TX3

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IDT72V8981PA Summary of contents

Page 1

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) 3.3V ...

Page 2

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 INDEX RX3 F0i 13 C4i ...

Page 3

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 SYMBOL NAME I/O GND Ground DTA Data Acknowledgment O (Open Drain) RX0-3 RX Input F0i Frame Pulse I C4i Clock I A0-A5 ...

Page 4

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 Data to be output on the serial streams may come from two sources: Data Memory or Connection Memory. The Connection Memory is 16 bits wide and is split into two ...

Page 5

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 INITIALIZATION OF THE IDT72V8981 On initialization or power up, the contents of the Connection Memory High can be in any state. This is a potentially hazardous condition when multiple TX ...

Page 6

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 Bit Name 7 SM (Split Memory) When 1, all subsequent reads are from the Data Memory and writes are to the Connection Memory LOW, except when the Control Register is ...

Page 7

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 Symbol Parameter V - GND CC Vi Voltage on Digital Inputs V Voltage on Digital Outputs O I Current at Digital Outputs O T Storage Temperature S P Package Power ...

Page 8

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 Symbol Characteristics (3) t Clock Period CLK t Clock Width High CH t Clock Width Low CL t Clock Transition Time CTT t Frame Pulse Setup Time FPS t Frame ...

Page 9

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 Symbol Characteristics t TX0-3 Delay - Active to High Z TAZ t TX0-3 Delay - High Z to Active TZA t TX0-3 Delay - Active to Active TAA t TX0-3 ...

Page 10

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 Symbol Characteristics t Chip Select Setup Time CSS t Read/Write Setup Time RWS t Address Setup Time ADS t Acknowledgment Delay Fast AKD t Acknowledgment Delay Slow AKD t Fast ...

Page 11

IDT XXXXXX XX Device Type Package 5/23/2000 pgs and 11. 8/18/2000 pgs and 11. 01/24/2001 pgs. 1 and 7. CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 *To search for sales office near you, please ...

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