HCC4063B Datasheet, PDF (3/12 Pages) STMicroelectronics – 4-BIT MAGNITUDE COMPARATOR

LOGIC DIAGRAM
HCC/HCF4063B
TRUTH TABLE
A3, B3
A3 > B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 < B3
X = Don’t care
Inputs
Comparing
A2, B2
A1, B1
A0, B0
X
A2 > B2
A2 = B2
A2 = B2
X
X
A1 > B1
A1 = B1
X
X
X
A0 > B0
A2 = B2
A2 = B2
A2 = B2
A1 = B1
A1 = B1
A1 = B1
A0 = B0
A0 = B0
A0 = B0
A2 = B2
A2 = B2
A2 < B2
X
A1 = B1
A1 < B1
X
X
A0 < B0
X
X
X
1 ≡ High state
Cascading
Outputs
A<B A=B A>B A< B A=B A>B
X
X
X
0
0
1
X
X
X
0
0
1
X
X
X
0
0
1
X
X
X
0
0
1
0
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
0
X
X
X
1
0
0
X
X
X
1
0
0
X
X
X
1
0
0
X
X
X
1
0
0
0 ≡ Low state.
3/12