Philips Semiconductors
Product specification
4-bit binary full adder with fast carry
74HC/HCT283
Fig.4 Functional diagram.
FUNCTION TABLE
COUT EXAMPLE(2)
∑
∑
∑
∑
4
PINS
CIN A1 A2 A3
A4 B1
B2
B3 B4
1
2
3
logic levels
active HIGH
active LOW
L
0
1
L
0
1
H
1
0
L
0
1
H
1
0
H
1
0
L
0
1
L
0
1
H
1
0
H
H
L
L
H
(3)
1
0
1
0
0
1
0
1
1
(4)
0
Note
1. H = HIGH voltage level
L = LOW voltage level
2. example
1001
1010
-----
10011
3. for active HIGH, example = (9 + 10 = 19)
4. for active LOW, example = (carry + 6 + 5 = 12)
December 1990
4