FSTU32160 Datasheet, PDF (1/6 Pages) Fairchild Semiconductor – 16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch with -2V Undershoot Protection

May 1999
Revised March 2000
FSTU32160
16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch
with −2V 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 B₁ or B₂ or
both. The A and B Ports are “undershoot hardened” with
UHC™ protection to support an extended range to 2.0V
below ground. Fairchild’s integrated Undershoot Hardened
Circuit, UHC senses undershoot at the I/O’s, and responds
by preventing voltage differentials from developing and
turning on the switch.
Two select (SEL₁, SEL₂) inputs provide switch enable con-
trol. When SEL₁, SEL₂ 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 −2V (A and B Ports).
s Slower Output Enable times prevent signal disruption
s 4Ω 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 Package Number
Package Description
FSTU32160MTD
MTD56
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 “X” to the ordering code.
UHC™ is a trademark of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation DS500244
www.fairchildsemi.com