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HD74LS283 Datasheet, PDF (2/8 Pages) Hitachi Semiconductor – 4-bit Binary Full Adders
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HD74LS283
Function Table
Outputs
Inputs
When C0 = L
When C0 = H
When C2 = L
When C2 = H
A1
B1
A2
B2
Σ1
Σ2
C2
Σ1
Σ2
C2
A3
B3
A4
B4
Σ3
Σ4
C4
Σ3
Σ4
C4
L
L
L
L
L
L
L
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; high level, L; low level
Note: Input conditions at A1, B1, A2, B2, and C0are use to determine outputs Σ1 and Σ2 and the value of the internal carry
C2. The values at C2, A3, B3, A4, and B4 are then used to determine outputs Σ3, Σ4, and C4.
Rev.3.00, Jul.15.2005, page 2 of 7
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