參數(shù)資料
型號: FST3384A
文件頁數(shù): 156/178頁
文件大?。?/td> 3973K
代理商: FST3384A
1999 Fairchild Semiconductor Corporation
DS500302
www.fairchildsemi.com
August 1999
Revised December 1999
F
2
)
P
FSTU3257
Quad 2:1 Multiplexer/Demultiplexer Bus Switch with
2V Undershoot Hardened Circuit (UHC
) Protection
General Description
The Fairchild Switch FSTU3257 is a quad 2:1 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 propagation delay
or generating additional ground bounce noise.
When OE is LOW, the select pin connects the A Port to the
selected B Port output. The A and B Ports are “undershoot
hardened” with UHC
protection to support an extended
range of 2.0V below ground. Fairchild’s integrated Under-
shoot Hardened Circuit UHC senses undershoot at the I/O
and responds by preventing voltage differentials from
developing and turning on the switch. When OE is HIGH,
the switch is OPEN and a high-impedance state exists
between the two ports.
Features
I
Undershoot hardened to
2V (A and B Ports)
I
Soft enable turn-on to minimize bus to bus charge
sharing during enable
I
4
switch connection between two ports.
I
Minimal propagation delay through the switch.
I
Low l
CC
.
I
Zero bounce in flow-through mode.
I
Control inputs compatible with TTL level.
I
See Applications Note AN-5008 for details
Ordering Code:
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
UHC
is a trademark of Fairchild Semiconductor Corporation.
Order Number
FSTU3257QSC
FSTU3257MTC
Package Number
MQA16
MTC16
Package Description
16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
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