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FST3244WM Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor

Il numero della parte FST3244WM
Spiegazioni elettronici  Octal Bus Switch
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Produttore elettronici  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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FST3244WM Scheda tecnica(HTML) 1 Page - Fairchild Semiconductor

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© 2005 Fairchild Semiconductor Corporation
DS500021
www.fairchildsemi.com
June 1997
Revised January 2005
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.
Features
■ 4
: switch connection between two ports.
■ Minimal propagation delay through the switch.
■ Low lCC.
■ Zero bounce in flow-through mode.
■ Control inputs compatible with TTL level.
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
Connection Diagram
Truth Table
Order Number
Package Number
Package Description
FST3244WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
FST3244QSC
MQA20
20-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150" Wide
FST3244MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
FST3244MTCX_NL
(Note 1)
MTC20
Pb-Free 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,
4.4mm Wide
Pin Name
Description
OE1, OE2
Bus Switch Enable
1A, 2A
Bus A
1B, 2B
Bus B
Inputs
Inputs/Outputs
OE1
OE2
1A, 1B
2A, 2B
LL
1A
1B
2A
2B
LH
1A
1B
Z
HL
Z
2A
2B
HH
Z
Z


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