SN54F521_07 Datasheet, PDF (1/15 Pages) Texas Instruments – 8-BIT IDENTITY COMPARATORS

• Compares Two 8-Bit Words
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
These identity comparators perform comparisons
on two 8-bit binary or BCD words. They provide
P = Q outputs.
The SN54F521 is characterized for operation over
the full military temperature range of – 55°C to
125°C. The SN74F521 is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
P, Q OE
OUTPUT
P=Q
P=Q L
L
P≠Q X
H
X
H
H
logic symbol^†
1
OE
2
P0
4
P1
6
P2
8
P3
11
P4
13
P5
15
P6
17
P7
3
Q0
5
Q1
7
Q2
9
Q3
12
Q4
14
Q5
16
Q6
18
Q7
COMP
0
P
7
1P = Q
0
Q
7
19
P=Q
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984 and}
IEC Publication 617-12.
SN54F521, SN74F521
8-BIT IDENTITY COMPARATORS
SDFS091 – MARCH 1987 – REVISED OCTOBER 1993
SN54F521 . . . J PACKAGE
SN74F521 . . . DW OR N PACKAGE
(TOP VIEW)
OE ₁
P0 ₂
Q0 3
P1 4
Q1 5
P2 6
Q2 7
P3 8
Q3 9
GND 10
20 ^V_CC
19 ^{P = Q}
18 Q7
17 P7
16 Q6
15 P6
14 Q5
13 P5
12 Q4
11 P4
SN54F521 . . . FK PACKAGE
(TOP VIEW)
P1
3 2 1 20 19
4
18
Q7
Q1 ₅
17 ^P7
P2 6
16 Q6
Q2 7
15 P6
P3 8
14 Q5
9 10 11 12 13
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 1993, Texas Instruments Incorporated
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