Texas Instruments SN74ALS688DW Bedienungsanleitung


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SN54ALS688, SN74ALS688
8-BIT IDENTITY COMPARATORS
SDAS228A – JUNE 1982 – REVISED JANUARY 1995
Copyright  1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
•Compare Two 8-Bit Words
•Totem-Pole Outputs (P = Q)
•′ALS688 Are Identical to ALS521′
•Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
description
These identity comparators perform comparisons
on two 8-bit binary or BCD words and provide
P = Q outputs. These devices have totem-pole
outputs.
The SN54ALS688 is characterized for operation
over the full military temperature range of –55 C°
to 125°C. The SN74ALS688 is characterized for
operation from 0°C to 70 C.°
FUNCTION TABLE
INPUTS
OUTPUT
DATA
P, Q
ENABLE
G
OUTPUT
P = Q
P = Q L L
P > Q L H
P < Q L H
X H 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
Q7
P7
Q6
P6
Q5
P5
Q4
P4
SN54ALS688 . . . J PACKAGE
SN74ALS688 ...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
SN54ALS688 . . . FK PACKAGE
(TOP VIEW)
Q0
P0
G
Q4
P5 P = Q
Q3
GND
P4 V
CC
PRODUCTION DATA information is current as of publication date.
Products conform to specications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SN54ALS688, SN74ALS688
8-BIT IDENTITY COMPARATORS
SDAS228A – JUNE 1982 – REVISED JANUARY 1995
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbol†
COMP
G1
1
0
2
P0
4
P1 6
P2 8
P3 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
19
1P=Q
G
P
Q
P = Q
†This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
SN54ALS688, SN74ALS688
8-BIT IDENTITY COMPARATORS
SDAS228A – JUNE 1982 – REVISED JANUARY 1995
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
19
17
18
15
16
13
14
11
12
8
9
6
7
4
5
2
3
1
P = Q
P7
Q7
P6
Q6
P5
Q5
P4
Q4
P3
Q3
P2
Q2
P1
Q1
P0
Q0
G
absolute maximum ratings over operating free-air temperature range (unless otherwise noted) †
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54ALS688 –55°C to 125 C°. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS688 0°C to 70 C°. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150 C°. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.


Produktspezifikationen

Marke: Texas Instruments
Kategorie: Nicht kategorisiert
Modell: SN74ALS688DW

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