74F521 Datasheet, PDF (3/8 Pages) NXP Semiconductors – 8-bit identity comparator

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