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FST3253 View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
Manufacturer
FST3253
Fairchild
Fairchild Semiconductor Fairchild
FST3253 Datasheet PDF : 5 Pages
1 2 3 4 5
September 1997
Revised December 1999
FST3253
Dual 4:1 Multiplexer/Demultiplexer Bus Switch
General Description
The Fairchild Switch FST3253 is a dual 4:1 high-speed
CMOS TTL-compatible multiplexer/demultiplexer bus
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, S0 and S1 connect the A Port to the
selected B Port output. When OE is HIGH, 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
FST3253M
FST3253QSC
M16A
MQA16
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
16-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide
FST3253MTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Diagram
Connection Diagram
Pin Descriptions
Pin Name
OE1, OE2
S0, S1
A
B1, B2, B3, B4
Description
Bus Switch Enables
Select Inputs
Bus A
Bus B
Truth Table
S1
S0 OE1 OE2
X
X
H
X
X
X
X
H
L
L
L
L
L
H
L
L
H
L
L
L
H
H
L
L
Function
Disconnect 1A
Disconnect 2A
A = B1
A = B2
A = B3
A = B4
© 1999 Fairchild Semiconductor Corporation DS500058
www.fairchildsemi.com
 

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