72V8988JG IDT, Integrated Device Technology Inc, 72V8988JG Datasheet

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72V8988JG

Manufacturer Part Number
72V8988JG
Description
Manufacturer
IDT, Integrated Device Technology Inc
Datasheet
1.72V8988JG.pdf (14 pages)

Specifications of 72V8988JG

Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
3.6V
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Lead Free Status / RoHS Status
Compliant
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The ST-BUS
FEATURES:
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
• • • • •
DESCRIPTION:
by a microprocessor. The IDT72V8988 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. The IDT72V8988 provides
FUNCTIONAL BLOCK DIAGRAM
RX0
RX1
RX2
RX3
2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
The IDT72V8988 is an ST-BUS
44-pin Plastic Quad Flatpack (PQFP)
128 x 128 channel non-blocking switch
Automatic signal identification (ST-BUS
4 RX inputs—32 channels at 64 Kbit/s per serial line
4 TX outputs—32 channels at 64 Kbit/s per serial line
Three-state serial outputs
Microprocessor Interface (8-bit data bus)
Frame Integrity for data applications
3.3V Power Supply
Available in 44-pin Plastic Leaded Chip Carrier (PLCC), and
Operating Temperature Range -40° ° ° ° ° C to +85° ° ° ° ° C
3.3V I/O with 5V Tolerant Inputs
Serial Data
Receive
Streams
®
/GCI compatible digital switch controlled
Memory
Data
3.3 VOLT TIME SLOT INTERCHANGE
DIGITAL SWITCH
128 x 128
®
, GCI)
DS
Microprocessor Interface
C4i
CS
Timing
Control Register
Unit
R/W A0/
F0i
is a trademark of Mitel Corp.
A5
1
V
per-channel variable or constant throughput delay modes and microprocessor
read and write access to individual channels. As an important function of a digital
switch is to maintain sequence integrity and minimize throughput delay, the
IDT72V8988 is an ideal solution for most switching needs.
FUNCTIONAL DESCRIPTION
delay are high priority requirements in today’s integrated data and multimedia
networks. The IDT72V8988 provides these functions on a per-channel basis
using a standard microprocessor control interface. Each of the four serial lines
is designed to switch 64 Kbit/s PCM or N x 64 Kbit/s data.
slots to control other devices such as ISDN transceivers and trunk interfaces.
Supporting both GCI and ST-BUS
internal circuit to automatically identify the polarity and format of the frame
synchronization.
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
CC
DTA D0/
Frame sequence, constant throughput delay, and guaranteed minimum
In Processor Mode, the microprocessor can access the input and output time
A functional block diagram of the IDT72V8988 device is shown on page 1.
GND
D7
Output MUX
Connection
Memory
®
formats, IDT72V8988 has incorporated an
Serial Data
Transmit
Streams
ODE
AUGUST 2003
IDT72V8988
5704 drw01
DSC-5704/5
TX0
TX1
TX2
TX3

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72V8988JG Summary of contents

Page 1

FEATURES: • • • • • 128 x 128 channel non-blocking switch • • • • • Automatic signal identification (ST-BUS • • • • • inputs—32 channels at 64 Kbit/s per serial line • • • • ...

Page 2

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 PIN CONFIGURATION NOTES: 1. DNC - Do Not Connect. INDEX RX3 F0i 13 C4i ...

Page 3

IDT72V8988 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

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 FUNCTIONAL DESCRIPTION (Cont'd) four output (TX0-3) serial streams are provided in the IDT72V8988 device allowing a complete 128 x 128 channel non-blocking switch matrix to be constructed. The serial interface ...

Page 5

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 The information switched to the third time slot after the input has entered the device (for instance, input channel 0 to output channel 3 or input channel 30 to output ...

Page 6

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 Incoming Now Time Slot 28............ Slots For J: DELAY=3 Slots, 32 Slots, 33 Slots, and 34 ...

Page 7

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 Control Register The Control Register is only accessed when A5=0. All other address bits have no effect when A5=0. When A5 =1, only 32 bytes are randomly accessable via A0-A4 ...

Page 8

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 TABLE 3      CONTROL REGISTER Bit Name 7 SM (Split Memory) When 1, all subsequent reads are from the Data Memory and writes are to the ...

Page 9

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Vcc Symbol Voltage Vi Voltage on Digital Inputs V Voltage on Digital Outputs O I Current at Digital Outputs O T Storage Temperature S P ...

Page 10

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS Symbol Parameter t Frame Pulse Width F0iW t Frame Pulse Setup Time F0iS t Frame Pulse Hold Time F0iH t TX delay Active to Active DAA t ...

Page 11

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS Symbol Parameter t Clock Period C4i Pulse Width Frame Width High WFH t Frame Setup F0iS t Frame Hold F0iH t ...

Page 12

IDT72V8988 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 Output Driver Enable Delay OED t ...

Page 13

IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS Symbol Characteristics CS Setup from DS Rising t CSS t R/W Setup from DS Rising RWS t Add Setup from DS Rising ADS CS Hold after DS ...

Page 14

ORDERING INFORMATION IDT XXXXXX Device Type Package DATASHEET DOCUMENT HISTORY 05/24/2000 pgs and 14. 08/21/2000 pgs and 14. 01/24/2001 pgs. 1 and 9. 04/05/2001 pg. 11. 03/10/2003 pg. 1. 05/09/2003 pgs. 1- and ...

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