HEF4585B Просмотр технического описания (PDF) - Philips Electronics
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HEF4585B Datasheet PDF : 6 Pages
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Philips Semiconductors
4-bit magnitude comparator
Product specification
HEF4585B
MSI
FUNCTION TABLE
COMPARING INPUTS
A3, B3
A3 > B3
A3 < B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A3 = B3
A2, B2
X
X
A2 > B2
A2 < B2
A2 = B2
A2 = B2
A2 = B2
A2 = B2
A2 = B2
A2 = B2
A2 = B2
A2 = B2
A2 = B2
A1, B1
X
X
X
X
A1 > B1
A1 < B1
A1 = B1
A1 = B1
A1 = B1
A1 = B1
A1 = B1
A1 = B1
A1 = B1
A0, B0
X
X
X
X
X
X
A0 > B0
A0 < B0
A0 = B0
A0 = B0
A0 = B0
A0 = B0
A0 = B0
Notes
1. H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
CASCADING INPUTS
IA > B
H
X
H
X
H
X
H
X
X
H
X
X
L
IA < B
X
X
X
X
X
X
X
X
L
L
H
H
L
IA = B
X
X
X
X
X
X
X
X
H
L
L
H
L
OA > B
H
L
H
L
H
L
H
L
L
H
L
L
L
OUTPUTS
OA < B
L
H
L
H
L
H
L
H
L
L
H
H
L
OA = B
L
L
L
L
L
L
L
L
H
L
L
H
L
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
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