74F521SC National Semiconductor, 74F521SC Datasheet - Page 2

• Manufacturer Part Number: 74F521SC
• Manufacturer: National Semiconductor
• Type: Identity Comparatorr

Specifications of 74F521SC

• Logic Family: F
• Technology: Bipolar
• Number Of Bits: 8
• High Level Output Current: -1mA
• Low Level Output Current: 20mA
• Output Function: A=B
• Package Type: SOIC
• Mounting: Surface Mount
• Pin Count: 20
• Polarity: Inverting
• Abs. Propagation Delay Time: 11ns
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

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Unit Loading/Fan Out
Truth Table
H
L
Note 1: A
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
LOW Voltage Level
HIGH Voltage Level
0
B
0
, A
1
B
1
, A
Pin Names
A
B
I
O
A B
0
0
A B
2
–A
–B
B
7
7
2
, etc.
I
A
Word A Inputs
Word B Inputs
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
H
H
L
L
B
Inputs
Description
A
A
B (Note 1)
B (Note 1)
A
A
A, B
2
B
B
HIGH/LOW Output I
50/33.3
1.0/1.0
1.0/1.0
1.0/1.0
U.L.
Output
O
A
20 A/ 0.6 mA
20 A/ 0.6 mA
20 A/ 0.6 mA
H
H
H
L
Input I
1 mA/20 mA
B
IH
OH
/I
/I
IL
OL