鈭?/div>
2V Undershoot Protection
General Description
The Fairchild Switch FSTU32X384 provides 20 bits of high-
speed CMOS TTL-compatible bus switches. 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 device is organized
as four 5-bit switches with separate bus enable (OE) sig-
nals. When OE is LOW, the switch is ON and Port A is con-
nected to Port B. When OE is HIGH, the switch is OPEN
and a high-impedance state exists between the two ports.
The A and B Ports are protected against undershoot to
support an extended range to 2.0V below ground.
Fairchild鈥檚 integrated Undershoot Hardened Circuit
(UHC
铮?/div>
) senses undershoot at the I/O and responds by
preventing voltage differentials from developing and turn-
ing the switch on.
Features
s
4
鈩?/div>
switch connection between two ports
s
Minimal propagation delay through the switch
s
Ultra low power with
<
0.1
碌
A typical I
CC
s
Zero ground bounce in flow-through mode
s
Control inputs compatible with TTL level
s
See Application Note AN-5008 for details on
FSTU - Undershoot Protected Fairchild Switch Family
Ordering Code:
Order Number
FSTU32X384QSP
Package
Number
MQA48A
Package Description
48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide
Device also available in Tape and Reel. Specify by appending suffix letter 鈥淴鈥?to the ordering code.
Logic Diagram
UHC铮?is a trademark of Fairchild Semiconductor Corporation.
漏 2002 Fairchild Semiconductor Corporation
DS500705
www.fairchildsemi.com
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