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HD74HC283 Datasheet, PDF (2/8 Pages) Hitachi Semiconductor – 4-bit Binary Full Adder
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HD74HC283
Function Table
A1/A3
Inputs
B1/B3
A2/A4
B2/B4
Outputs
When C0 = L/When C2 = L
Σ1/Σ3
Σ2/Σ4
C2/C4
When C0 = H/When C2 = H
Σ1/Σ3
Σ2/Σ4
C2/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 C0 are used 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.
Pin Arrangement
Σ2 1
B2 2
A2 3
Σ1 4
A1 5
B1 6
C0 7
GND 8
Σ2
B2
B3
A2
A3
Σ1
Σ3
A1
A4
B1
B4
C0
Σ4
C4
(Top view)
16 VCC
15 B3
14 A3
13 Σ3
12 A4
11 B4
10 Σ4
9 C4
Rev.2.00 Jan 31, 2006 page 2 of 7
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