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What is 74LS68?

This electronic component, produced by the manufacturer "Motorola Semiconductors", performs the same function as "8-BIT MAGNITUDE COMPARATORS".


74LS68 Datasheet PDF - Motorola Semiconductors

Part Number 74LS68
Description 8-BIT MAGNITUDE COMPARATORS
Manufacturers Motorola Semiconductors 
Logo Motorola Semiconductors Logo 


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8-BIT MAGNITUDE
COMPARATORS
The SN54 / 74LS682, 684, 688 are 8-bit magnitude comparators. These
device types are designed to perform comparisons between two eight-bit
binary or BCD words. All device types provide P = Q outputs and the LS682
and LS684 have P>Q outputs also.
The LS682, LS684 and LS688 are totem pole devices. The LS682 has a
20 kpullup resistor on the Q inputs for analog or switch data.
CONNECTION DIAGRAMS (TOP VIEW)
VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4
20 19 18 17 16 15 14 13 12 11
SN54/74LS682/684
1 2 3 4 5 6 7 8 9 10
P>Q P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND
VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4
20 19 18 17 16 15 14 13 12 11
SN54/74LS682
SN54/74LS684
SN54/74LS688
8-BIT MAGNITUDE
COMPARATORS
LOW POWER SCHOTTKY
20
1
20
1
20
1
J SUFFIX
CERAMIC
CASE 732-03
N SUFFIX
PLASTIC
CASE 738-03
DW SUFFIX
SOIC
CASE 751D-03
SN54/74LS688
1 2 3 4 5 6 7 8 9 10
G P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND
TYPE
LS682
LS684
LS688
P=Q
yes
yes
yes
P>Q
yes
yes
no
OUTPUT
ENABLE
no
no
yes
OUTPUT
CONFIGURATION
totem-pole
totem-pole
totem-pole
PULLUP
yes
no
no
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXDW SOIC
FUNCTION TABLE
INPUTS
OUTPUTS
DATA
ENABLES
P, Q G, GT G2 P = Q P > Q
P=Q L L L H
P>Q L L H L
P<Q L L H H
X H HHH
H = HIGH Level, L = LOW Level, X = Irrelevant
FAST AND LS TTL DATA
5-603

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74LS68 equivalent
Case 751D-03 DW Suffix
20-Pin Plastic
SO-20 (WIDE)
-A-
20 11
-B- P
0.25 (0.010) M
BM
1 10 10 PL
G
-T- C SEATING
PLANE
D 20 PL
0.25 (0.010) M T B S
K
AS
R X 45°
MF
J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.
5. 751DĆ01, AND Ć02 OBSOLETE, NEW STANDARD
751DĆ03.
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN MAX
12.65
12.95
7.40
7.60
2.35
2.65
0.35
0.49
0.50
0.90
1.27 BSC
0.25
0.32
0.10
0°
0.25
7°Ă
10.05
10.55
0.25
0.75
INCHES
MIN MAX
0.499
0.510
0.292
0.299
0.093
0.104
0.014
0.019
0.020
0.035
0.050 BSC
0.010
0.012
0.004
0°Ă
0.009
7°Ă
0.395
0.415
0.010
0.029
Case 732-03 J Suffix
20-Pin Ceramic Dual In-Line
20
1
A
F
11
10
B
C
L
H
SEATING
D PLANE
N
GK
J
M
-A-
20 11
B
1 10
C
Case 738-03 N Suffix
20-Pin Plastic
L
-T-
SEATING
PLANE
E
GF
K
N
D 20 PL
0.25 (0.010) M T A M
M
J 20 PL
0.25 (0.010) M T B M
NOTES:
1. LEADS WITHIN 0.25 mm (0.010) DIA., TRUE
POSITION AT SEATING PLANE, AT MAXIMUM
MATERIAL CONDITION.
2. DIM L TO CENTER OF LEADS WHEN FORMED
PARALLEL.
3. DIM A AND B INCLUDES MENISCUS.
DIM
A
B
C
D
F
G
H
J
K
L
M
N
MILLIMETERS
MIN MAX
23.88 25.15
6.60
7.49
3.81
5.08
0.38
0.56
1.40
1.65
2.54 BSC
0.51
1.27
0.20
0.30
3.18
4.06
7.62 BSC
0° 15°
0.25
1.02
INCHES
MIN MAX
0.940
0.990
0.260
0.295
0.150
0.200
0.015
0.022
0.055
0.065
0.100 BSC
0.020
0.050
0.008
0.012
0.125
0.160
0.300 BSC
0° 15°
0.010 0.040
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L" TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIMENSION B" DOES NOT INCLUDE MOLD
FLASH.
5. 738Ć02 OBSOLETE, NEW STANDARD 738Ć03.
DIM
A
B
C
D
E
F
G
J
K
L
M
N
MILLIMETERS
MIN MAX
25.66 27.17
6.10
6.60
3.81
4.57
0.39
0.55
1.27 BSC
1.27
1.77
2.54 BSC
0.21
0.38
2.80
3.55
7.62 BSC
0° 15°
0.51
1.01
INCHES
MIN MAX
1.010
1.070
0.240
0.260
0.150
0.180
0.015
0.022
0.050 BSC
0.050
0.070
0.100 BSC
0.008
0.015
0.110
0.140
0.300 BSC
0° 15°
0.020 0.040
FAST AND LS TTL DATA
5-607


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On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for 74LS68 electronic component.


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