FST3244 Fairchild Semiconductor, FST3244 Datasheet

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FST3244

Manufacturer Part Number
FST3244
Description
Octal Bus Switch
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2000 Fairchild Semiconductor Corporation
FST3244WM
FST3244QSC
FST3244MTC
FST3244
8-Bit Bus Switch
General Description
The Fairchild Switch FST3244 provides 8-bits of high-
speed CMOS TTL-compatible bus switching in a standard
’244 pin-out. The low on resistance of the switch allows
inputs to be connected to outputs without adding propaga-
tion delay or generating additional ground bounce noise.
The device is organized as two 4-bit switches with separate
OE inputs. When OE is LOW, the switch is ON and Port A
is connected to Port B. When OE is HIGH, 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.
Logic Diagram
Pin Descriptions
Order Number
Pin Name
OE
1A, 2A
1B, 2B
1
, OE
Package Number
2
MQA20
MTC20
M20B
Bus Switch Enable
Description
Bus A
Bus B
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
DS500021
Features
Connection Diagram
Truth Table
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.
CC
Package Description
.
OE
H
H
L
L
1
Inputs
OE
H
H
L
L
2
June 1997
Revised December 2000
1A
1A
1A, 1B
Inputs/Outputs
Z
Z
1B
1B
www.fairchildsemi.com
2A
2A
2A, 2B
Z
Z
2B
2B

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FST3244 Summary of contents

Page 1

... FST3244 8-Bit Bus Switch General Description The Fairchild Switch FST3244 provides 8-bits of high- speed CMOS TTL-compatible bus switching in a standard ’244 pin-out. The low on resistance of the switch allows inputs to be connected to outputs without adding propaga- tion delay or generating additional ground bounce noise. ...

Page 2

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

Page 3

AC Electrical Characteristics Symbol Parameter t ,t Prop Delay Bus to Bus (Note 6) PHL PLH Output Enable Time PZH PZL Output Disable Time PHZ PLZ Note 6: 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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