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74F521SC Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # 74F521SC
Description  8-Bit Identity Comparator
PDF  8 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

74F521SC Datasheet(HTML) 2 Page - National Semiconductor (TI)

  74F521SC Datasheet HTML 1Page - National Semiconductor (TI) 74F521SC Datasheet HTML 2Page - National Semiconductor (TI) 74F521SC Datasheet HTML 3Page - National Semiconductor (TI) 74F521SC Datasheet HTML 4Page - National Semiconductor (TI) 74F521SC Datasheet HTML 5Page - National Semiconductor (TI) 74F521SC Datasheet HTML 6Page - National Semiconductor (TI) 74F521SC Datasheet HTML 7Page - National Semiconductor (TI) 74F521SC Datasheet HTML 8Page - National Semiconductor (TI)  
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Unit LoadingFan Out
54F74F
Pin Names
Description
UL
Input IIH IIL
HIGHLOW
Output IOH IOL
A0–A7
Word A Inputs
1010
20 mA b06 mA
B0–B7
Word B Inputs
1010
20 mA b06 mA
IAeB
Expansion or Enable Input (Active LOW)
1010
20 mA b06 mA
OAeB
Identity Output (Active LOW)
50333
b
1 mA20 mA
Truth Table
Inputs
Output
IA e B
A B
OA e B
LA e B
L
LA i BH
HA e B
H
HA i BH
H e HIGH Voltage Level
L e LOW Voltage Level
A0 e B0 A1 e B1 A2 e B2 etc
Connection Diagrams
Pin Assignment for DIP
SOIC SSOP and Flatpak
TLF9545 – 2
Pin Assignment
for LCC
TLF9545 – 3
Logic Diagram
TLF9545 – 5
Please note that this diagram is provided only for the understanding of logic operations and should not be
used to estimate propagation delays
2



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