74F521 Philips, 74F521 Datasheet - Page 3

• Manufacturer Part Number: 74F521
• Description: 8-bit identity comparator
• Manufacturer: Philips

Philips Semiconductors
LOGIC DIAGRAM
APPLICATIONS
May 15, 1990
V
GND = Pin 10
8-bit identity comparator
CC
I
A=B
B4
A5
B5
A6
B6
A7
B7
A0
B0
A1
B1
A2
B2
A3
B3
A4
ENABLE
LOW
ENABLE
LOW
= Pin 20
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
1
A0
A0
I
I
A=B
A=B
B0
B0
Q
Q
A=B
A=B
A7
A7
B7
B7
SF00276
19
PARALLEL EXPANSION
Q
RIPPLE EXPANSION
A=B
A8
A8
I
I
A=B
A=B
B8
B8
3
FUNCTION TABLE
H = High voltage level
L = Low voltage level
X = Don’t care
* A0=B0, A1=B1, A2=B2, etc.
Q
Q
A=B
A=B
I
A=B
H
H
L
L
A15
A15
B15
B15
INPUTS
A16
A16
I
I
A=B
A=B
A=B*
A=B*
A, B
A B
A B
B16
B16
Q
Q
A=B
A=B
Product specification
A23
A23
74F521
OUTPUT
SF00277
Q
A=B
H
H
H
L
B23
B23