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DM74LS181 Datasheet

  • DM74LS181

  • 4-Bit Arithmetic Logic Unit

  • Fairchild

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DM74LS181 4-Bit Arithmetic Logic Unit
October 1988
Revised April 2000
DM74LS181
4-Bit Arithmetic Logic Unit
General Description
The DM74LS181 is a 4-bit Arithmetic Logic Unit (ALU)
which can perform all the possible 16 logic operations on
two variables and a variety of arithmetic operations.
Features
s
Provides 16 arithmetic operations: add, subtract, com-
pare, double, plus twelve other arithmetic operations
s
Provides all 16 logic operations of two variables:
exclusive-OR, compare, AND, NAND, OR, NOR, plus
ten other logic operations
s
Full lookahead for high speed arithmetic operation on
long words
Ordering Code:
Order Number
DM74LS181N
Package Number
N24A
Package Description
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-010, 0.600 Wide
Logic Symbols
Active High Operands
Connection Diagram
Active Low Operands
Pin Descriptions
Pin Names
A0鈥揂3
B0鈥揃3
S0鈥揝3
M
C
n
F0鈥揊3
V
CC
=
Pin 24
GND
=
Pin 12
Description
Operand Inputs (Active LOW)
Operand Inputs (Active LOW)
Function Select Inputs
Mode Control Input
Carry Input
Function Outputs (Active LOW)
Comparator Output
Carry Generate Output (Active LOW)
Carry Propagate Output (Active LOW)
Carry Output
A
=
B
G
P
C
n+4
漏 2000 Fairchild Semiconductor Corporation
DS009821
www.fairchildsemi.com

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