Texas Instruments SN74F520DW, SN74F520DWR, SN74F520N Datasheet
SN54F520, SN74F520
8-BIT IDENTITY COMPARATORS
SDFS081A – MARCH 1987 – REVISED OCT OBER 1993
Copyright 1993, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• Compares Two 8-Bit Words
• 20-kΩ Pullup Resistors on Q Inputs
• 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 ′F520 features 20-kΩ pullup
termination resistors on the Q inputs for analog or
switch data.
The SN54F520 is characterized for operation over
the full military temperature range of –55°C to
125°C. The SN74F520 is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUT
P, Q OE
P = Q
P = Q L L
P ≠ Q XH
XHH
logic symbol
†
COMP
0
2
P0
4
P1
6
P2
8
P3
1
19
1P = Q
11
P4
13
P5
15
P6
7
17
P7
0
3
Q0
5
Q1
7
Q2
9
Q3
12
Q4
14
Q5
16
Q6
7
18
Q7
P
Q
OE
P = Q
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
P0
Q0
P1
Q1
P2
Q2
P3
Q3
GND
V
CC
P = Q
Q7
P7
Q6
P6
Q5
P5
Q4
P4
SN54F520 ...J PACKAGE
SN74F520 . . . DW OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
Q7
P7
Q6
P6
Q5
P1
Q1
P2
Q2
P3
SN54F520 . . . FK PACKAGE
(TOP VIEW)
Q0P0OE
Q4
P5
P = Q
Q3
GND
P4
V
CC
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.
SN54F520, SN74F520
8-BIT IDENTITY COMPARATORS
SDFS081A – MARCH 1987 – REVISED OCT OBER 1993
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
17
18
P7
Q7
15
16
P6
Q6
13
14
P5
Q5
11
12
P4
Q4
8
9
P3
Q3
6
7
P2
Q2
4
5
P1
Q1
2
3
P0
Q0
1
19
P = Q
OE
NOTE: 20-kΩ pullup resistors are on the Q inputs.
Loading...