74F381 Datasheet, PDF (3/8 Pages) NXP Semiconductors – Arithmetic Logic Unit

Truth Table
Inputs
Outputs
Function
S₀
S₁
S₂
C_n
A_n
B_n
F₀
F₁
F₂
F₃
G
P
CLEAR
L
L
L
X
X
X
L
L
L
L
L
L
L
L
L
H
H
H
H
H
L
L
L
H
L
H
H
H
L
L
L
H
L
L
L
L
L
H
H
B Minus A
H
L
L
L
H
H
H
H
H
H
H
L
H
L
L
L
L
L
L
H
L
H
L
H
H
H
H
H
L
L
H
H
L
H
L
L
L
H
H
H
H
H
L
L
L
L
H
L
L
L
L
H
H
H
H
H
L
L
L
H
L
L
L
L
H
H
L
H
L
L
H
H
H
L
L
A Minus B
L
H
L
L
H
H
H
H
H
H
H
L
H
L
L
L
L
L
L
H
L
H
L
H
H
L
L
L
H
H
H
H
L
H
H
H
H
L
L
H
H
H
L
L
L
L
H
L
L
L
L
L
L
L
L
H
H
L
L
H
H
H
H
H
H
L
L
H
L
H
H
H
H
H
L
A Plus B
H
H
L
L
H
H
L
H
H
H
L
L
H
L
L
H
L
L
L
H
H
H
L
H
L
L
L
L
H
L
H
H
L
L
L
L
L
H
L
H
H
H
H
H
H
H
L
L
X
L
L
L
L
L
L
H
H
X
L
H
H
H
H
H
H
H
A⊕B
L
L
H
X
H
L
H
H
H
H
H
L
X
H
H
L
L
L
L
L
L
X
L
L
L
L
L
L
H
H
X
L
H
H
H
H
H
H
H
A+B
H
L
H
X
H
L
H
H
H
H
H
H
X
H
H
H
H
H
H
H
L
X
L
L
L
L
L
L
L
L
X
L
H
L
L
L
L
H
H
AB
L
H
H
X
H
L
L
L
L
L
L
L
X
H
H
H
H
H
H
H
L
X
L
L
H
H
H
H
H
H
X
L
H
H
H
H
H
H
H
PRESET
H
H
H
X
H
L
H
H
H
H
H
H
X
H
H
H
H
H
H
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
3
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