參數(shù)資料
型號(hào): IDT728981
廠商: Integrated Device Technology, Inc.
英文描述: TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128
中文描述: 時(shí)隙交換數(shù)字開(kāi)關(guān)128 × 128
文件頁(yè)數(shù): 1/10頁(yè)
文件大小: 91K
代理商: IDT728981
1
TIME SLOT INTERCHANGE
DIGITAL SWITCH
128 x 128
IDT728981
2001 Integrated Device Technology, Inc.
DSC-5703/1
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
Mcroprocessor Interface (8-bit data bus)
5V Power Supply
Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 40-pin
Plastic Dip (P-DIP) and 44-pin Plastic Quad Flatpack (PQFP)
Operating Temperature Range -40
°
C to +85
°
C
The IDT728981 is a ST-BUS
compatible digital switch controlled by a
mcroprocessor. The IDT728981 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 (64 Kbit/s per channel) to form
a multiplexed 2.048 Mb/s stream
A functional block diagramof the IDT728981 device is shown below. The
serial streams operate continuously at 2.048 Mb/s and are arranged in 125
μ
s
wide frames each containing 32, 8-bit channels. Four input (RX0-3) and four
output (TX0-3) serial streams are provided in the IDT728981 device allowing
a complete 128 x 128 channel non-blocking switch matrix to be constructed.
The serial interface (
C4i
) clock for the device 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 128-position Data
Memory. By using an internal counter that is reset by the input 8 KHz frame pulse,
F0i
, the incomng serial data streams can be framed and sequentially ad-
dressed.
Microprocessor Interface
Control Register
Timing
Unit
RX0
RX1
RX2
RX3
TX0
TX1
TX2
TX3
ODE
F0i
C4i
V
CC
CS
DS
R/
W
A0/
A5
GND
DTA
D0/
D7
5703 drw01
Data
Memory
Output MUX
Connection
Memory
Receive
Serial Data
Streams
Transmit
Serial Data
Streams
相關(guān)PDF資料
PDF描述
IDT728981DB TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128
IDT728981J TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128
IDT728981P TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128
IDT728985 TIME SLOT INTERCHANGE DIGITAL SWITCH
IDT7290820 TIME SLOT INTERCHANGE DIGITAL SWITCH 2,048 x 2,048
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