PI74FCT521 Datasheet, PDF (2/4 Pages) Pericom Semiconductor Corporation – Fast CMOS 8-Bit Identity Comparator

PI74FCT521T
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Product Pin Description
Pin Name
IA=B
OA=B
A0–A7
B0–B7
GND
VCC
Description
Expansion or Enable Input (Active LOW)
Identity Output (Active LOW)
Word A Inputs
Word B Inputs
Ground
Power
Product Pin Configuration
IA=B
A0
B0
A1
B1
A2
B2
A3
B3
GND
1
20
2
19
3 20-PIN 18
4 ^L20 17
5 ^P20 16
6 ^Q20 15
7 ^R20 14
8 ^S20 13
9
12
10
11
Vcc
OA=B
B7
A7
B6
A6
B5
A5
B4
A4
Truth Table⁽¹⁾
IA=B
L
L
H
H
Inputs
A, B
A = B*
A≠B
A = B*
A≠B
Output
OA=B
L
H
H
H
NOTE: 1. H = High Voltage Level
L = Low Voltage Level,
*A0 = B0, A1 = B1, A2 = B2, etc.
2
PS2019A 03/11/96