FST34X2245 Datasheet, PDF (1/5 Pages) Fairchild Semiconductor – 32-Bit Bus Switch with 25Ω Series Resistors in Outputs

December 2001
Revised December 2001
FST34X2245
32-Bit Bus Switch with 25Ω 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 25Ω series resistors to
reduce signal-reflection noise, eliminating the need for
external terminating resistors.
Features
s 25Ω switch connection between two ports
s Minimal propagation delay through the switch
s Low l_CC
s Zero bounce in flow-through mode
s Control inputs compatible with TTL level
s 32-bit version of FST32245
s Packaged in 20.5mm 80-lead package
Ordering Code:
Order Number Package Number
Package Description
FST34X2245QSP
MQA80A
80-Lead, QVSOP, JEDEC MO-154, 0.150" Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
© 2001 Fairchild Semiconductor Corporation DS500594
www.fairchildsemi.com