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IDT72V8988 Datasheet(PDF) 3 Page - Integrated Device Technology

Part No. IDT72V8988
Description  3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128
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Maker  IDT [Integrated Device Technology]
Homepage  http://www.idt.com
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IDT72V8988 Datasheet(HTML) 3 Page - Integrated Device Technology

 
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Commercial Temperature Range
IDT72V8988 3.3V Time Slot Interchange
Digital Switch 128 x 128
PIN DESCRIPTIONS
SYMBOL
NAME
I/O
DESCRIPTION
GND
Ground.
Ground Rail.
VCC
VCC
+3.3 Volt Power Supply.
DTA
Data Acknowledgment
O
This active LOW output indicates that a data bus transfer is complete. A pull-up resistor is required at this
(Open Drain)
output.
RX0-3
RX Input 0 to 3
I
Serial data input streams. These streams have 32 channels at data rates of 2.048 Mb/s.
F0i
Frame Pulse
I
This input accepts and automatically identifies frame synchronization signals formatted according to different
backplane specifications such as ST-BUS® and GCI.
C4i
Clock
I
4.096 MHz serial clock for shifting data in and out of the data streams.
A0-A5
Address 0 to 5
I
These lines provide the address to IDT72V8988 internal registers.
DS
Data Strobe
I
This is the input for the active HIGH data strobe on the microprocessor interface. This input operates with
CS to enable the internal read and write generation.
R/
W
Read/Write
I
This input controls the direction of the data bus lines (D0-D7) during a microprocessor access.
CS
Chip Select
I
Active LOW input enabling a microprocessor read or write of control register or internal memories.
D0-D7
Data Bus 0 to 7
I/O
These pins provide microprocessor access to data in the internal control register. Connection Memory HIGH,
Connection Memory LOW and data memory.
TX0-3
TX Outputs 0 to 3
O
Serial data output streams. These streams are composed of 32, 64 Kbit/s channels at data rates of 2.048 Mb/s.
(Three-state Outputs)
ODE
Output Drive Enable
I
This is an output enable for the TX0-3 serial outputs. If this input is LOW, TX0-3 are high-impedance. If this is
HIGH, each channel may still be put into high-impedance by software control.


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