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Fairchild Semiconductor - Quad Bus Switch

Numéro de référence FST3126MTC
Description Quad Bus Switch
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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FST3126MTC fiche technique
August 1997
Revised January 2005
FST3126
4-Bit Bus Switch
General Description
The Fairchild Switch FST3126 provides four high-speed
CMOS TTL-compatible bus switches. The low on resis-
tance of the switch allows inputs to be connected to out-
puts without adding propagation delay or generating
additional ground bounce noise.
The device is organized as four 1-bit switches with sepa-
rate OE inputs. When OE is HIGH, the switch is ON and
Port A is connected to Port B. When OE is LOW, the switch
is OPEN and a high-impedance state exists between the
two ports.
Features
s 4switch connection between two ports.
s Minimal propagation delay through the switch.
s Low lCC.
s Zero bounce in flow-through mode.
s Control inputs compatible with TTL level.
Ordering Code:
Order Number Package Number
Package Description
FST3126M
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
FST3126QSC
MQA16
16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
FST3126MTC
MTC14
14-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Diagram
Connection Diagrams
Pin Assignment for SOIC and TSSOP
Pin Assignment for QSOP
Pin Descriptions
Pin Name
OE1, OE2, OE3, OE4
1A, 2A, 3A, 4A
1B, 2B, 3B, 4B
NC
Description
Bus Switch Enables
Bus A
Bus B
Not Connected
Truth Table
Inputs
OE
L
H
© 2005 Fairchild Semiconductor Corporation DS500044
Inputs/Outputs
A,B
Z
A=B
www.fairchildsemi.com

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