DM54LS181 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – 4-Bit Arithmetic Logic Unit

June 1992
DM54LS181 DM74LS181
4-Bit Arithmetic Logic Unit
General Description
The ’LS181 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
Y _{Provides 16 arithmetic operations add subtract com-}
pare double plus twelve other arithmetic operations
Y _{Provides all 16 logic operations of two variables exclu-}
sive-OR compare AND NAND OR NOR plus ten
other logic operations
Y _{Full lookahead for high speed arithmetic operation on}
long words
Connection Diagram
Dual-In-Line Package
TL F 9821 – 1
Order Number DM54LS181J DM54LS181W or DM74LS181N
See NS Package Number J24A N24A or W24C
Pin Names
A0 – A3
B0 – B3
S0 – S3
M
C_n
F0– F3
AeB
G
P
C_na₄
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
C1995 National Semiconductor Corporation TL F 9821
RRD-B30M115 Printed in U S A