5-603

FAST AND LS TTL DATA

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 k

pullup resistor on the Q inputs for analog or switch data.

CONNECTION DIAGRAMS (TOP VIEW)

SN54/74LS682/684

VCC

P>Q

P=Q Q7 P7 Q6

P0 Q0

P1 Q1

Q2 P3

Q3 GND

SN54/74LS688

VCC

P=Q Q7 P7 Q6

P0 Q0

P1 Q1

Q2 P3

Q3 GND

TYPE

P = Q

P > Q

OUTPUT
ENABLE

OUTPUT

CONFIGURATION

PULLUP

TYPE

P = Q

P > Q

OUTPUT
ENABLE

OUTPUT

CONFIGURATION

PULLUP

LS682

yes

totem-pole

yes

LS684

yes

totem-pole

LS688

yes

totem-pole

SN54/74LS682
SN54/74LS684
SN54/74LS688

8-BIT MAGNITUDE

COMPARATORS

LOW POWER SCHOTTKY

ORDERING INFORMATION

SN54LSXXXJ

Ceramic

SN74LSXXXN

Plastic

SN74LSXXXDW SOIC

J SUFFIX

CERAMIC

CASE 732-03

N SUFFIX

PLASTIC

CASE 738-03

DW SUFFIX

SOIC

CASE 751D-03

FUNCTION TABLE

INPUTS

OUTPUTS

DATA

ENABLES

P, Q

G, GT

P = Q

P > Q

P = Q

P > Q

P < Q

H = HIGH Level, L = LOW Level, X = Irrelevant

5-604

FAST AND LS TTL DATA

SN54/74LS682

�

SN54/74LS684

�

SN54/74LS688

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

54
74

4.5

4.75

5.0
5.0

5.5

5.25

Operating Ambient Temperature Range

54
74

� 55

25
25

125

�

IOH

Output Current -- High

54, 74

�0.4

IOL

Output Current -- Low

54
74

12
24

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE

(unless otherwise specified)

Symbol

Parameter

Limits

Unit

Test Conditions

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIH

Input HIGH Voltage

2.0

Guaranteed Input HIGH Voltage for
All Inputs

VIL

Input LOW Voltage

0.7

Guaranteed Input LOW Voltage for
All Inputs

VIL

Input LOW Voltage

0.8

Guaranteed Input LOW Voltage for
All Inputs

VIK

Input Clamp Diode Voltage

� 0.65

� 1.5

VCC = MIN, IIN = � 18 mA

VOH

Output HIGH Voltage

2.5

3.5

VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table

VOH

Output HIGH Voltage

2.7

3.5

VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table

VOL

Output LOW Voltage

54, 74

0.25

0.4

IOL = 12 mA

VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table

VOL

Output LOW Voltage

0.35

0.5

IOL = 24 mA

VIN = VIL or VIH
per Truth Table

IIH

Input HIGH Current

�

VCC = MAX, VIN = 2.7 V

IIH

Input HIGH Current

LS628-Q Inputs

0.1

VCC = MAX, VIN = 5.5 V

Others

0.1

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

LS682-Q Inputs

� 0.4

VCC = MAX, VIN = 0.4 V

IIL

Input LOW Current

Others

� 0.2

VCC = MAX, VIN = 0.4 V

IOS

Short Circuit Current (Note 1)

� 30

� 130

VCC = MAX

ICC

Power Supply
Current

LS682

VCC = MAX

ICC

Power Supply
Current

LS684

VCC = MAX

Current

LS688

CC = MAX

Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.

5-605

FAST AND LS TTL DATA

SN54/74LS682

�

SN54/74LS684

�

SN54/74LS688

LOGIC DIAGRAMS

(1)

(2)
(3)

(4)

(5)

(6)
(7)

(8)

(9)

(11)

(12)

(13)
(14)

(15)
(16)

(17)
(18)

(19)

P = Q

P > Q

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(11)

(12)

(13)

(14)

(15)

(16)

(17)

(18)

(19)

P = Q

(1)

SN54 / 74LS682 thru LS684

SN54 / 74LS688

5-606

FAST AND LS TTL DATA

SN54/74LS682

�

SN54/74LS684

�

SN54/74LS688

AC CHARACTERISTICS

(TA = 25

�

SN54/74LS682

Symbol

Parameter

Limits

Unit

Test Conditions

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

tPLH
tPHL

Propagation Delay, P to P = Q

13
15

25
25

VCC = 5.0 V

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, Q to P = Q

14
15

25
25

VCC = 5.0 V

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, P to P > Q

20
15

30
30

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, Q to P > Q

21
19

30
30

SN54/74LS684

Symbol

Parameter

Limits

Unit

Test Conditions

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

tPLH
tPHL

Propagation Delay, P to P = Q

15
17

25
25

VCC = 5.0 V

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, Q to P = Q

16
15

25
25

VCC = 5.0 V

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, P to P > Q

22
17

30
30

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, Q to P > Q

24
20

30
30

SN54/74LS688

Symbol

Parameter

Limits

Unit

Test Conditions

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

tPLH
tPHL

Propagation Delay, P to P = Q

12
17

18
23

VCC = 5.0 V

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, Q to P = Q

12
17

18
23

VCC = 5.0 V

CL = 45 pF

RL = 667

tPLH
tPHL

Propagation Delay, G , G1 to P = Q

18
20

RL = 667

5-607

FAST AND LS TTL DATA

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. 751D 01, AND 02 OBSOLETE, NEW STANDARD

751D 03.

MIN

MAX

MILLIMETERS

INCHES

DIM

12.65

7.40

2.35

0.35

0.50

0.25

0.10

�

10.05

0.25

12.95

7.60

2.65

0.49

0.90

0.32

0.25

�

10.55

0.75

0.499

0.292

0.093

0.014

0.020

0.010

0.004

�

0.395

0.010

0.510

0.299

0.104

0.019

0.035

0.012

0.009

�

0.415

0.029

1.27 BSC

0.050 BSC

-A-

-B-

10 PL

-T-

20 PL

SEATING

PLANE

R X 45

�

Case 751D-03 DW Suffix

20-Pin Plastic
SO-20 (WIDE)

0.25 (0.010)

Case 732-03 J Suffix

20-Pin Ceramic Dual In-Line

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.

MIN

MAX

MILLIMETERS

INCHES

DIM

23.88

6.60

3.81

0.38

1.40

0.51

0.20

3.18

25.15

7.49

5.08

0.56

1.65

1.27

0.30

4.06

�

0.25

0.940

0.260

0.150

0.015

0.055

0.020

0.008

0.125

0.990

0.295

0.200

0.022

0.065

0.050

0.012

0.160

�

1.02

2.54 BSC

7.62 BSC

0.100 BSC

0.300 BSC

�

0.010

�

0.040

SEATING

PLANE

Case 738-03 N Suffix

20-Pin Plastic

MIN

MAX

MILLIMETERS

INCHES

DIM

25.66

6.10

3.81

0.39

1.27

0.21

2.80

27.17

6.60

4.57

0.55

1.77

0.38

3.55

�

0.51

1.010

0.240

0.150

0.015

0.050

0.008

0.110

1.070

0.260

0.180

0.022

0.070

0.015

0.140

�

1.01

1.27 BSC

2.54 BSC

7.62 BSC

0.050 BSC

0.100 BSC

0.300 BSC

�

0.020

�

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. 738 02 OBSOLETE, NEW STANDARD 738 03.

-A-

20 PL

-T-

SEATING

PLANE

T A

0.25 (0.010)

T B

0.25 (0.010)

5-608

FAST AND LS TTL DATA

SYMBOL

SW1

SW2

tPZH

Open

Closed

tPZL

Closed

Open

tPLZ

Closed

tPHZ

Closed

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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different
applications. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does
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against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

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Электронный компонент: 74LS682