FST33X257 Fairchild Semiconductor, FST33X257 Datasheet

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FST33X257

Manufacturer Part Number
FST33X257
Description
24:12 Multiplexer-Demultiplexer Bus Switch
Manufacturer
Fairchild Semiconductor
Datasheet
1.FST33X257.pdf (5 pages)
© 2002 Fairchild Semiconductor Corporation
FST33X257QSP
FST33X257
24:12 Multiplexer/Demultiplexer Bus Switch
General Description
The Fairchild Switch FST33X257 is a 24:12 high-speed
CMOS
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
the selected B Port output. When OE
is OPEN and a high-impedance state exists between the
two ports.
Ordering Code:
Order Number
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
TTL-compatible
x
is LOW, the select pin connects the A Port to
Package
MQA48A
Number
multiplexer/demultiplexer
48-Lead Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide
x
is HIGH, the switch
DS500724
bus
Features
4 switch connection between two ports
Minimal propagation delay through the switch
Low l
Zero bounce in flow-through mode
Control inputs compatible with TTL level
Package Description
CC
May 2002
Revised July 2002
www.fairchildsemi.com

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FST33X257 Summary of contents

Page 1

... FST33X257 24:12 Multiplexer/Demultiplexer Bus Switch General Description The Fairchild Switch FST33X257 is a 24:12 high-speed CMOS TTL-compatible multiplexer/demultiplexer 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 x the selected B Port output ...

Page 2

Logic Diagram www.fairchildsemi.com Connection Diagram Pin Descriptions Pin Name Description OE Bus Switch Enable x S Select Input x A Bus A B –B Bus Truth Table S OE Function Disconnect L L ...

Page 3

Absolute Maximum Ratings Supply Voltage ( Switch Voltage ( Input Voltage (V )(Note Input Diode Current ( Output (I ) Sink Current OUT DC V ...

Page 4

AC Electrical Characteristics Symbol Parameter Propagation Delay Bus to Bus (Note 8) PHL PLH Propagation Delay, Select to Bus Output Enable Time, Select to Bus B PZH PZL Output Enable Time ...

Page 5

Quarter Size Very Small Outline Package (QVSOP), JEDEC MO-154, 0.150" Wide Technology Description The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its 74LVX3L384 (FST3384) bus switch product. Fairchild does not ...

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