IDT72V8981J8 IDT, Integrated Device Technology Inc, IDT72V8981J8 Datasheet

IC DGTL SW 128X128 44-PLCC

IDT72V8981J8

Manufacturer Part Number
IDT72V8981J8
Description
IC DGTL SW 128X128 44-PLCC
Manufacturer
IDT, Integrated Device Technology Inc
Series
72Vr
Type
Multiplexerr
Datasheet

Specifications of IDT72V8981J8

Circuit
1 x 4:4
Independent Circuits
1
Voltage Supply Source
Single Supply
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output High, Low
-
Lead Free Status / RoHS Status
Not Compliant, Contains lead / RoHS non-compliant
Other names
72V8981J8

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
IDT72V8981J8
Manufacturer:
IDT, Integrated Device Technology Inc
Quantity:
10 000
FEATURES:
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DESCRIPTION:
microprocessor. The IDT72V8981 can handle as many as 128, 64 Kbit/s input
and output channels. Those 128 channels are divided into 4 serial inputs and
FUNCTIONAL BLOCK DIAGRAM
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The ST-BUS
2003 Integrated Device Technology, Inc.
The IDT72V8981 is a ST-BUS
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), and
44-pin Plastic Quad Flatpack (PQFP)
Operating Temperature Range -40° ° ° ° ° C to +85° ° ° ° ° C
3.3V I/O with 5V Tolerant Inputs
RX0
RX1
RX2
RX3
Serial Data
Receive
Streams
®
compatible digital switch controlled by a
All rights reserved.
Memory
Data
3.3 VOLT TIME SLOT INTERCHANGE
DIGITAL SWITCH
128 x 128
®
)
DS
Product specifications subject to change without notice.
Microprocessor Interface
C4i
CS
Timing
Control Register
Unit
R/W A0/
F0i
is a trademark of Mitel Corp.
A5
1
V
outputs, each of which consists of 32 channels (64 Kbit/s per channel) to form
a multiplexed 2.048 Mb/s stream.
FUNCTIONAL DESCRIPTION
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 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.
Memory or Connection Memory. The Connection Memory is 16 bits wide and
CC
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
Data to be output on the serial streams may come from two sources: Data
GND
D7
Output MUX
Connection
Memory
Serial Data
Transmit
Streams
ODE
AUGUST 2003
IDT72V8981
5702 drw01
DSC-5702/4
TX0
TX1
TX2
TX3

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IDT72V8981J8 Summary of contents

Page 1

FEATURES: • • • • • 128 x 128 channel non-blocking switch • • • • • Serial Telecom Bus Compatible (ST-BUS • • • • • inputs—32 channels at 64 Kbit/s per serial line • • • ...

Page 2

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 PIN CONFIGURATION NOTE: 1. DNC - Do Not Connect INDEX RX3 F0i 13 C4i ...

Page 3

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

Page 4

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 FUNCTIONAL DESCRIPTION (Cont'd) is split into two 8-bit blocks—Connection Memory HIGH and Connection Memory LOW. Each location in Connection Memory is associated with a particular channel in an output stream ...

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 TABLE 3 — CONTROL REGISTER CONFIGURATION Bit Name 7 SM (Split Memory) When 1, all subsequent reads are from the Data Memory and writes are to the Connection Memory LOW, ...

Page 7

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Vcc Symbol Voltage Vi Voltage on Digital Inputs GND - 0.3 V Voltage on Digital Outputs GND - 0 Current at Digital Outputs ...

Page 8

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS 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 ...

Page 9

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS 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 ...

Page 10

IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS 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 ...

Page 11

ORDERING INFORMATION IDT XXXXXX XX Device Type Package DATASHEET DOCUMENT HISTORY 05/23/2000 pgs and 11. 08/18/2000 pgs and 11. 01/24/2001 pgs. 1 and 7. 03/10/2003 pg. 1. 05/09/2003 pgs. 1- and 11. 08/20/2003 pg. ...

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