IDT728985J IDT, Integrated Device Technology Inc, IDT728985J Datasheet

IC DGTL SW 256X256 44-PLCC

IDT728985J

Manufacturer Part Number
IDT728985J
Description
IC DGTL SW 256X256 44-PLCC
Manufacturer
IDT, Integrated Device Technology Inc
Series
7200r
Type
Multiplexerr
Datasheet

Specifications of IDT728985J

Circuit
1 x 8:8
Independent Circuits
1
Voltage Supply Source
Single Supply
Voltage - Supply
4.75 V ~ 5.25 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
728985J

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a microprocessor. The IDT728985 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. The IDT728985 provides per-
channel variable or constant throughput delay modes and microprocessor read
2001 Integrated Device Technology, Inc.
RX0
RX1
RX2
RX3
RX4
RX5
RX6
RX7
The IDT728985 is a ST-BUS
44-pin Plastic Quad Flatpack (PQFP) and 40-pin Plastic Dip
(P-DIP)
256 x 256 channel non-blocking switch
Automatic signal identification (ST-BUS
8 RX inputs — 32 channels at 64 Kbit/s per serial line
8 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
5V Power Supply
Operating Temperature Range -40 C to +85 C
Available in 44-pin Plastic Leaded Chip Carrier (PLCC),
Serial Data
Receive
Streams
®
/GCI compatible digital switch controlled by
Memory
Data
TIME SLOT INTERCHANGE
DIGITAL SWITCH
256 x 256
®
, GCI)
DS
Microprocessor Interface
C4i
Timing
CS
Control Register
Unit
R/W A0/
F0i
A5
1
V
and write access to individual channels. As an important function of a digital
switch is to maintain sequence integrity and minimize throughput delay, the
IDT728985 is an ideal solution for most switching needs.
delay are high priority requirements in today’s integrated data and multimedia
networks. The IDT728985 provides these functions on a per-channel basis
using a standard microprocessor control interface. Each of the eight 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
125 s wide frames each containing 32, 8-bit channels. Eight input (RX0-7) 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 IDT728985 device is shown on page 1.
GND
D7
Output MUX
Connection
Memory
CCO
®
formats, IDT728985 has incorporated an
Serial Data
Transmit
Streams
ODE
5708 drw01
IDT728985
DSC-5708/2
TX0
TX1
TX2
TX3
TX4
TX5
TX6
TX7

Related parts for IDT728985J

IDT728985J Summary of contents

Page 1

Automatic signal identification (ST-BUS 8 RX inputs — 32 channels at 64 Kbit/s per serial line 8 TX outputs — 32 channels at 64 Kbit/s per serial line Three-state serial outputs Microprocessor Interface (8-bit ...

Page 2

IDT728985 Time Slot Interchange Digital Switch 256 x 256 INDEX RX3 7 TX3 39 RX4 TX4 8 38 RX5 9 37 TX5 RX6 36 10 TX6 RX7 35 11 TX7 GND F0i C4i ...

Page 3

IDT728985 Time Slot Interchange Digital Switch 256 x 256 eight output (TX0-7) serial streams are provided in the IDT728985 device allowing a complete 256 x 256 channel non-blocking switch matrix to be constructed. The serial interface clock for the device ...

Page 4

IDT728985 Time Slot Interchange Digital Switch 256 x 256 between the output and input channels; i.e., the throughput delay will be less than one frame. Table 1 shows the possible delays for the IDT728985 device in Variable Delay Mode. An ...

Page 5

IDT728985 Time Slot Interchange Digital Switch 256 x 256 Incoming Now Time Slot 28............ Slots For J: DELAY=3 Slots, 32 Slots, 33 Slots, and ...

Page 6

IDT728985 Time Slot Interchange Digital Switch 256 x 256 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 at ...

Page 7

IDT728985 Time Slot Interchange Digital Switch 256 x 256 Bit Name 7 SM (Split Memory) When 1, all subsequent reads are from the Data Memory and writes are to the Connection Memory, except when the Control Register is accessed again. ...

Page 8

IDT728985 Time Slot Interchange Digital Switch 256 x 256 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 Dissapation ...

Page 9

IDT728985 Time Slot Interchange Digital Switch 256 x 256 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 RX Setup Time STiS ...

Page 10

IDT728985 Time Slot Interchange Digital Switch 256 x 256 Symbol Parameter t Clock Period C4i tCL, tCH Pulse Width t Frame Width High WFH t Frame Setup F0iS t Frame Hold F0iH t Data Delay/Clock Active to Active DAA t ...

Page 11

IDT728985 Time Slot Interchange Digital Switch 256 x 256 Symbol Characteristics t TX0-7 Delay - Active to High Z TAZ t TX0-7 Delay - High Z to Active TZA t Output Driver Enable Delay OED t CCO Output Delay XCD ...

Page 12

IDT728985 Time Slot Interchange Digital Switch 256 x 256 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 Falling t CSH t ...

Page 13

IDT XXXXXX Device Type Package 5/08/2000 pg. 1 6/05/2000 pgs and 13. 8/18/2000 pg. 2 01/24/2001 pgs. 1 and 8. 04/05/2001 pg. 10 CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 *To search for sales office ...

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