74F85 Datasheet, PDF (3/10 Pages) NXP Semiconductors – 4-bit magnitude comparator

Philips Semiconductors
4-bit magnitude comparator
Product specification
74F85
LOGIC DIAGRAM
A3 ¹⁵
1
B3
A2 ¹³
14
B2
I_A<B
2
I_A=B
3
I_A>B
4
12
A1
11
B1
5
A>B
6
A=B
7
A<B
10
A0
9
B0
V_CC = Pin 16
GND = Pin 8
FUNCTION TABLE
COMPARING INPUTS
A3,B3
A2,B2
A1,B1
A3>B3
X
X
A3<B3
X
X
A3=B3
A2>B2
X
A3=B3
A2<B2
X
A3=B3
A2=B2
A1>B1
A3=B3
A2=B2
A1<B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
A1=B1
A3=B3
A2=B2
H = High voltage level
L = Low voltage level
X = Don’t care
A1=B1
September 27, 1994
A0,B0
X
X
X
X
X
X
A0>B0
A0<B0
A0=B0
A0=B0
A0=B0
A0=B0
A0=B0
A0=B0
EXPANSION INPUTS
I_A>B
X
I_A<B
X
I_A=B
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
L
L
H
X
X
H
H
H
L
L
L
L
3
SF00078
A>B
H
L
H
L
H
L
H
L
H
L
L
L
L
H
OUTPUTS
A<B
L
H
L
H
L
H
L
H
L
H
L
L
L
H
A=B
L
L
L
L
L
L
L
L
L
L
H
H
L
L