FSTU32160_06 Datasheet, PDF (1/6 Pages) Fairchild Semiconductor – 16-Bit to 32-Bit Multiplexer/Demultiplexer Bus Switch with −2V Undershoot Protection

May 1999
Revised October 2006
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 have “undershoot hardened” cir-
cuit 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 turn-
ing on the switch.
Two select (S₁, S₂) inputs provide switch enable control.
When S₁, S₂ are HIGH, the device precharges the B Port
to a selectable bias voltage (Bias V) to minimize live inser-
tion 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 registered trademark of Fairchild Semiconductor Corporation.
© 2000 Fairchild Semiconductor Corporation DS500244
www.fairchildsemi.com