54F521LMQB National Semiconductor, 54F521LMQB Datasheet - Page 2

• Manufacturer Part Number: 54F521LMQB
• Manufacturer: National Semiconductor
• Type: Identity Comparatorr

Specifications of 54F521LMQB

• Logic Family: F
• Technology: Bipolar
• High Level Output Current: -1mA
• Low Level Output Current: 20mA
• Output Function: A=B
• Mounting: Surface Mount
• Pin Count: 20
• Polarity: Inverting
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature (max): 125C
• Operating Temperature Classification: Military
• Number Of Bits: 8
• Lead Free Status / RoHS Status: Not Compliant

Unit Loading Fan Out
Truth Table
Connection Diagrams
Pin Names
A
B
I
O
A
0
0
A
e
–A
–B
e
B
I
SOIC SSOP and Flatpak
Pin Assignment for DIP
A
B
7
7
H
H
L
L
e
Pin Assignment
B
for LCC
Inputs
Word A Inputs
Word B Inputs
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
A
A
A
A
A B
e
e
i
i
TL F 9545– 2
TL F 9545– 3
B
B
B
B
Description
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be
Output
O
A
H
H
H
L
e
B
HIGH LOW
2
50 33 3
1 0 1 0
1 0 1 0
1 0 1 0
U L
H
L
A
e
e
0
e
used to estimate propagation delays
LOW Voltage Level
HIGH Voltage Level
B
0
54F 74F
A
1
e
20 A
20 A
20 A
Output I
b
B
Input I
1 mA 20 mA
1
A
2
b
b
b
e
IH
OH
0 6 mA
0 6 mA
0 6 mA
B
2
I
IL
I
etc
OL
TL F 9545– 5