參數(shù)資料
型號: FSTU32X800
廠商: Fairchild Semiconductor Corporation
英文描述: 20-Bit Bus Switch with Precharged Outputs and -2V Undershoot Protection
中文描述: 20位總線開關(guān)預充電輸出和- 2V的下沖保護
文件頁數(shù): 1/5頁
文件大小: 192K
代理商: FSTU32X800
2002 Fairchild Semiconductor Corporation
DS500791
www.fairchildsemi.com
November 2002
Revised November 2002
F
FSTU32X800
20-Bit Bus Switch with Precharged Outputs
and
2V Undershoot Protection
General Description
The Fairchild Switch FSTU32X800 provides 20-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 A and B Ports are
protected against undershoot to support an extended
range to 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 the switch on. The device also pre-
charges the B Port to a selectable bias voltage (BiasV) to
minimize live insertion noise.
The device is organized as two 10-bit switches with a bus
enable (OE
n
) signal. When OE
n
is LOW, the switch is ON
and Port A is connected to Port B. When OE
n
is HIGH, the
switch is OPEN and the B Port is precharged to BiasV
through an equivalent 10-k
resistor.
Features
I
4
switch connection between two ports
I
Undershoot Hardened to -2.0V
I
Soft enable turn-on to minimize bus-to-bus charge
sharing during enable
I
Low l
CC
I
Zero bounce in flow-through mode
I
Output precharge to minimize live insertion noise
I
Control inputs compatible with TTL level
I
See Applications Note AN-5008 for details
Ordering Code:
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.
Order Number
Package
Number
MQA48A
Package Description
FSTU32X800QSP
48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide
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