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SN74ALS518DW Datasheet(PDF) 1 Page - Texas Instruments

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Part # SN74ALS518DW
Description  8-BIT IDENTITY COMPARATORS
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SN74ALS518DW Datasheet(HTML) 1 Page - Texas Instruments

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SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521
8-BIT IDENTITY COMPARATORS
SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995
Copyright
© 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Compare Two 8-Bit Words
Choice of Totem-Pole or Open-Collector
Outputs
SN74ALS518 and ′ALS520 Have 20-kΩ
Pullup Resistors on Q Inputs
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
TYPE
INPUT
PULLUP
OUTPUT FUNCTION
AND
TYPE
PULLUP
RESISTOR
AND
CONFIGURATION
SN74ALS518
Yes
P = Q open collector
′ALS520
Yes
P = Q totem pole
SN74ALS521‡
No
P = Q totem pole
‡ SN74ALS521 is identical to
′ALS688.
description
These identity comparators perform comparisons
on
two
8-bit
binary
or
BCD
words.
The
SN74ALS518 provides P = Q outputs, while the
′ALS520 and SN74ALS521 provide P = Q
outputs. The SN74ALS518 has an open-collector
output. The SN74ALS518 and
′ALS520 feature
20-k
Ω pullup resistors on the Q inputs for analog
or switch data.
The SN54ALS520 is characterized for operation
over the full military temperature range of – 55
°C
to 125
°C. The SN74ALS518, SN74ALS520, and
SN74ALS521 are characterized for operation
from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUTS
DATA
P, Q
ENABLE
G
P = Q
P = Q
P = Q
L
H
L
P > Q
LL
H
P < Q
LL
H
X
H
L
H
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
G
P0
Q0
P1
Q1
P2
Q2
P3
Q3
GND
VCC
P = Q / P = Q
Q7
P7
Q6
P6
Q5
P5
Q4
P4
SN54ALS520 ...J PACKAGE
SN74ALS518, SN74ALS520,
SN74ALS521 ... DW OR N PACKAGE
(TOP VIEW)
32 1 20 19
910 11 12 13
4
5
6
7
8
18
17
16
15
14
Q7
P7
Q6
P6
Q5
P1
Q1
P2
Q2
P3
SN54ALS520 . . . FK PACKAGE
(TOP VIEW)
† P = Q for SN74ALS518
P = Q for
′ALS520 and SN74ALS521
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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