FSTU32160 16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch with
鈭?V
Undershoot Protection
May 1999
Revised March 2000
FSTU32160
16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch
with
鈭?V
Undershoot Protection
General Description
The Fairchild Switch FSTU32160 is a 16-bit to 32-bit high-
speed CMOS TTL-compatible multiplexer/demultiplexer
bus switch. The low on resistance of the switch allows
inputs to be connected to outputs without adding propaga-
tion delay or generating additional ground bounce noise.
The device can be used in applications where two buses
need to be addressed simultaneously. The FSTU32160 is
designed so that the A Port demultiplexes into B
1
or B
2
or
both. The A and B Ports are 鈥渦ndershoot hardened鈥?with
UHC鈩?protection to support an extended range to 2.0V
below ground. Fairchild鈥檚 integrated Undershoot Hardened
Circuit, UHC senses undershoot at the I/O鈥檚, and responds
by preventing voltage differentials from developing and
turning on the switch.
Two select (SEL
1
, SEL
2
) inputs provide switch enable con-
trol. When SEL
1
, SEL
2
are HIGH, the device precharges
the B Port to a selectable bias voltage (Bias V) to minimize
live insertion noise.
Features
s
Undershoot hardened to
鈭?V
(A and B Ports).
s
Slower Output Enable times prevent signal disruption
s
4鈩?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
FSTU32160MTD
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鈩?is a trademark of Fairchild Semiconductor Corporation.
漏 2000 Fairchild Semiconductor Corporation
DS500244
www.fairchildsemi.com
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