hef4585b NXP Semiconductors, hef4585b Datasheet - Page 4

• Manufacturer Part Number: hef4585b
• Description: 4-bit Magnitude Comparator
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTION TABLE
Notes
1. H = HIGH state (the more positive voltage)
The upper 11 lines describe the normal operation under all conditions that will occur in a single device or in a serial
expansion scheme.
The lower 2 lines describe the operation under abnormal conditions on the cascading inputs. These conditions occur
when the parallel expansion technique is used.
January 1995
4-bit magnitude comparator
A
A
A
A
A
A
A
A
A
A
A
A
A
A
L = LOW state (the less positive voltage)
X = state is immaterial
3
3
3
3
3
3
3
3
3
3
3
3
3
3
, B
> B
< B
= B
= B
= B
= B
= B
= B
= B
= B
= B
= B
= B
3
3
3
3
3
3
3
3
3
3
3
3
3
3
COMPARING INPUTS
A
A
A
A
A
A
A
A
A
A
A
A
2
2
2
2
2
2
2
2
2
2
2
2
X
X
, B
> B
< B
= B
= B
= B
= B
= B
= B
= B
= B
= B
2
2
2
2
2
2
2
2
2
2
2
2
A
A
A
A
A
A
A
A
A
A
1
1
1
1
1
1
1
1
1
1
X
X
X
X
, B
> B
< B
= B
= B
= B
= B
= B
= B
= B
1
1
1
1
1
1
1
1
1
1
A
A
A
A
A
A
A
A
0
0
0
0
0
0
0
0
X
X
X
X
X
X
, B
> B
< B
= B
= B
= B
= B
= B
0
0
0
0
0
0
0
0
I
A B
H
X
H
X
H
X
H
X
X
H
X
X
L
CASCADING INPUTS
4
I
A
X
X
X
X
X
X
X
X
H
H
L
L
L
B
I
A = B
X
X
X
X
X
X
X
X
H
H
L
L
L
O
A
H
H
H
H
H
L
L
L
L
L
L
L
L
B
OUTPUTS
O
Product specification
A
H
H
H
H
H
H
HEF4585B
L
L
L
L
L
L
L
B
O
MSI
A = B
H
H
L
L
L
L
L
L
L
L
L
L
L