FST34X2245 32-Bit Bus Switch with 25: Series Resistors in Outputs
December 2001
Revised January 2005
FST34X2245
32-Bit Bus Switch with 25: Series Resistors in Outputs
General Description
The Fairchild Switch FST34X2245 provides 32-bits of high
speed CMOS TTL-compatible bus switching in a standard
flow-through mode. The low On Resistance of the switch
allows inputs to be connected to outputs without adding
propagation delay or generating additional ground bounce
noise.
The device is organized as a 32-bit switch. When OE is
LOW, the switch is ON and Port A is connected to Port B.
When OE is HIGH, the switch is OPEN and a high-imped-
ance state exists between the two ports.
The FST34X2245 has equivalent 25
:
series resistors to
reduce signal-reflection noise, eliminating the need for
external terminating resistors.
Features
鈻?/div>
25
:
switch connection between two ports
鈻?/div>
Minimal propagation delay through the switch
鈻?/div>
Low l
CC
鈻?/div>
Zero bounce in flow-through mode
鈻?/div>
Control inputs compatible with TTL level
鈻?/div>
32-bit version of FST32245
鈻?/div>
Packaged in 20.5mm 80-lead package
Ordering Code:
Order Number
FST34X2245QSPX
FST34X2245QSPX_NL
(Note 1)
Package
Number
MQA80A
MQA80A
Package Description
80-Lead, QVSOP, JEDEC MO-154, 0.150" Wide
Pb-Free 80-Lead, QVSOP, JEDEC MO-154, 0.150" Wide
Note 1:
鈥淿NL鈥?indicates Pb-Free product (per JEDEC J-STD-020B). Device is available in Tape and Reel only.
Logic Diagram
漏 2005 Fairchild Semiconductor Corporation
DS500594
www.fairchildsemi.com
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