Texas Instruments JM38510-34701BSA, JM38510-34701B2A, JM38510-34701BRA, SN54F521J, SN74F521N3 Datasheet
...
SN54F521, SN74F521
8-BIT IDENTITY COMPARATORS
SDFS091 – MARCH 1987 – REVISED OCTOBER 1993
• 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
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
INPUTS
P, Q OE
P = Q L L
P ≠ Q XH
XHH
†
0
7
0
7
OUTPUT
P = Q
COMP
P
1P = Q
Q
19
P = Q
SN54F521 ...J PACKAGE
SN74F521 . . . DW OR N PACKAGE
P1
Q1
P2
Q2
P3
(TOP VIEW)
OE
1
P0
2
Q0
3
P1
4
Q1
5
P2
6
Q2
7
P3
8
9
Q3
GND
SN54F521 . . . FK PACKAGE
10
(TOP VIEW)
Q0P0OE
3 2 1 20 19
4
5
6
7
8
9 10 11 12 13
Q3
P4
20
19
18
17
16
15
14
13
12
11
V
CC
Q4
V
CC
P = Q
Q7
P7
Q6
P6
Q5
P5
Q4
P4
18
17
16
15
14
P5 P = Q
Q7
P7
Q6
P6
Q5
GND
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
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.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1993, Texas Instruments Incorporated
2–1
SN54F521, SN74F521
8-BIT IDENTITY COMPARATORS
SDFS091 – MARCH 1987 – REVISED OCTOBER 1993
logic diagram (positive logic)
17
P7
18
Q7
15
P6
16
Q6
13
P5
14
Q5
11
P4
12
Q4
8
P3
19
P = Q
Q3
P2
Q2
P1
Q1
P0
Q0
OE
9
6
7
4
5
2
3
1
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Loading...