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HD74HC283 Datasheet, PDF (2/10 Pages) Hitachi Semiconductor – 4-bit Binary Full Adder
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HD74HC283
Function Table
Outputs
Inputs
A1/A3
L
B1/B3
L
A2/A4
L
B2/B4
L
When C0 = L/When C2 = L
∑1/∑3
∑2/∑4
C2/C4
L
L
L
When C0 = H/When C2 = H
∑1/∑3
∑1/∑4
C2/C4
H
L
L
H
L
L
L
H
L
L
L
H
L
L
H
L
L
H
L
L
L
H
L
H
H
L
L
L
H
L
H
H
L
L
L
H
L
L
H
L
H
H
L
H
L
H
L
H
H
L
L
L
H
L
H
H
L
H
H
L
L
L
H
H
H
H
L
L
L
H
H
L
H
L
L
L
H
L
H
L
H
H
L
H
L
L
H
H
H
L
L
L
H
L
H
L
H
H
H
L
L
L
H
H
H
L
H
L
L
H
H
L
H
L
L
H
H
L
L
H
H
L
H
H
L
H
H
H
L
H
L
H
H
L
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H:
L:
Note:
high level
low level
Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs ∑1 and ∑2 and the value of the
internal carry C2. The values at C2, A3, B3, A4 and B4 are then used to determine outputs ∑3, ∑4 and
C4.
2
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