English
Language : 

HD74LS85 Datasheet, PDF (2/7 Pages) Hitachi Semiconductor – 4-bit Magnitude Comparators
◁
HD74LS85
Function Table
Inputs
A3, B3
A2, B2
A1, B1
A0, B0
A3 > B3
X
X
X
A3 < B3
X
X
X
A3 = B3
A2 > B2
X
X
A3 = B3
A2 < B2
X
X
A3 = B3
A2 = B2
A1 > B1
X
A3 = B3
A2 = B2
A1 < B1
X
A3 = B3
A2 = B2
A1 = B1
A0 > B0
A3 = B3
A2 = B2
A1 = B1
A0 < B0
A3 = B3
A2 = B2
A1 = B1
A0 = B0
A3 = B3
A2 = B2
A1 = B1
A0 = B0
A3 = B3
A2 = B2
A1 = B1
A0 = B0
A3 = B3
A2 = B2
A1 = B1
A0 = B0
A3 = B3
A2 = B2
A1 = B1
A0 = B0
H; high level, L; low level, X; irrelevant
Cascading Inputs
A>B
A<B
A=B
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
H
L
L
L
H
L
X
X
H
H
H
L
L
L
L
Block Diagram
A>B
H
L
H
L
H
L
H
L
H
L
L
L
H
Outputs
A<B
L
H
L
H
L
H
L
H
L
H
L
L
H
A=B
L
L
L
L
L
L
L
L
L
L
H
L
L
A3
B3
A2
B2
A<B
A=B
A>B
A1
B1
A>B
A=B
A<B
A0
B0
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Supply voltage
VCC
7
V
Input voltage
VIN
7
V
Power dissipation
Storage temperature
PT
Tstg
400
mW
–65 to +150
°C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Rev.2.00, Feb.18.2005, page 2 of 6
 ▷