鈩?/div>
Series Resistors in Outputs (Preliminary)
General Description
The Fairchild Switch FSTU162211 provides 24-bits of high-
speed CMOS TTL-compatible bus switching. 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 12-bit or 24-bit bus switch.
When OE
1
is LOW, the switch is ON and Port 1A is con-
nected to Port 1B. When OE
2
is LOW, Port 2A is connected
to Port 2B. The A and B Ports are protected against under-
shoot to support an extended range to 2.0V below ground.
Fairchild鈥檚 integrated Undershoot Hardened Circuit
(UHC
錚?/div>
) senses undershoot at the I/O and responds by
preventing voltage differentials from developing and turn-
ing the switch on.
The FSTU162211 has equivalent 25
鈩?/div>
series resistors to
reduce signal-reflection noise, eliminating the need for
external terminating resistors.
Features
s
Undershoot hardened to
鈭?/div>
2V (A and B Ports)
s
Slower output enable times to prevent signal disruption
s
25
鈩?/div>
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
See Applications Note AN-5008 for details
Ordering Code:
Order Number
FSTU162211MTD
Package Number
MTD56
Package Description
56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
UHC錚?is a trademark of Fairchild Semiconductor Corporation.
漏 2001 Fairchild Semiconductor Corporation
DS500064
www.fairchildsemi.com
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