FST3345 Fairchild Semiconductor, FST3345 Datasheet

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FST3345

Manufacturer Part Number
FST3345
Description
8-Bit Bus Switch
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2005 Fairchild Semiconductor Corporation
FST3345WM
FST3345QSC
FST3345MTC
FST3345MTCX_NL
(Note 1)
FST3345
8-Bit Bus Switch
General Description
The Fairchild Switch FST3345 provides 8-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 device is organized as an 8-bit switch bank with dual
output enable inputs (OE and OE). When OE is LOW or
OE is HIGH, the switch is ON and Port A is connected to
Port B. When OE is HIGH and OE is LOW, the switch is
OPEN and a high-impedance state exists between the two
ports.
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Note 1: “_NL” indicates Pb-Free package (per JEDEC J-STD-020B). Device available in Tape and Reel only.
Logic Diagram
Pin Descriptions
Order Number
Pin Name
OE, OE
A
B
Package
Number
MQA20
MTC20
MTC20
M20B
Bus Switch Enables
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide
Description
Bus A
Bus B
DS500019
Features
Connection Diagram
Truth Table
4
Minimal propagation delay through the switch.
Low l
Zero bounce in flow-through mode.
Control inputs compatible with TTL level.
:
Package Description
switch connection between two ports.
CC
OE
X
H
L
.
Inputs
OE
H
L
X
June 1997
Revised March 2005
Disconnect
Function
Connect
Connect
www.fairchildsemi.com

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FST3345 Summary of contents

Page 1

... FST3345 8-Bit Bus Switch General Description The Fairchild Switch FST3345 provides 8-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 device is organized as an 8-bit switch bank with dual output enable inputs (OE and OE) ...

Page 2

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

Page 3

AC Electrical Characteristics Symbol Parameter t ,t Propagation Delay Bus to Bus PHL PLH (Note Output Enable Time PZH PZL Output Disable Time PHZ PLZ Note 7: This parameter is guaranteed by design ...

Page 4

Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide www.fairchildsemi.com Package Number M20B Package Number MQA20 4 ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Technology Description The Fairchild Switch family derives from and embodies Fairchild’s proven switch technology used for several years in its 74LVX3L384 ...

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