MOTOROLA SN74LS688DW, SN74LS688DWR2, SN74LS684DWR2, SN74LS684H, SN74LS684MEL Datasheet

 Semiconductor Components Industries, LLC, 1999

December, 1999 – Rev. 6

1 Publication Order Number:

SN74LS682/D

SN74LS682 SN74LS684
SN74LS688

8-Bit Magnitude
Comparators

The SN74LS682, 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 kΩ pullup resistor on the Q inputs for analog or switch data.

OUTPUT OUTPUT

TYPE P = Q P > Q

ENABLE CONFIGURATION

PULLUP

LS682 yes yes no totem-pole yes
LS684 yes yes no totem-pole no
LS688 yes no yes totem-pole no

GUARANTEED OPERATING RANGES

Symbol Parameter Min Typ Max Unit

V

CC

Supply Voltage 4.75 5.0 5.25 V

T

A

Operating Ambient

T emperature Range

0 25 70 °C

I

OH

Output Current – High – 0.4 mA

I

OL

Output Current – Low 24 mA

LOW

POWER

SCHOTTKY

Device Package Shipping

ORDERING INFORMATION

SN74LS682N 16 Pin DIP 1440 Units/Box
SN74LS682DW 16 Pin

SOIC
DW SUFFIX
CASE 751D

http://onsemi.com

2500/Tape & Reel

PLASTIC
N SUFFIX
CASE 738

20

1

20

1

SN74LS684N 16 Pin DIP 1440 Units/Box
SN74LS684DW 16 Pin

2500/Tape & Reel
SN74LS688N 16 Pin DIP 1440 Units/Box
SN74LS688DW 16 Pin

2500/Tape & Reel

SN74LS682 SN74LS684 SN74LS688

http://onsemi.com

2

CONNECTION DIAGRAMS (TOP VIEW)

SN74LS682/684

18 17 16 15 14 13

123456

7

20 19

8

V

CC

P>Q

P=Q Q7 P7 Q6 Q5P6 P5

P0 Q0 P1 Q1 P2 Q2 P3

910

Q3 GND

12 11

Q4 P4

SN74LS688

18 17 16 15 14 13

123456

7

20 19

8

V

CC

G

P=Q Q7 P7 Q6 Q5P6 P5

P0 Q0 P1 Q1 P2 Q2 P3

910

Q3 GND

12 11

Q4 P4

FUNCTION TABLE

INPUTS OUTPUTS

DATA ENABLES

P, Q G

, GT G2 P = Q P > Q

P = Q
P > Q
P < Q

X

L
L
L
H

L
L
L
H

L
H
H
H

H
L
H
H

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

SN74LS682 SN74LS684 SN74LS688

http://onsemi.com

3

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol Parameter

Min Typ Max

Unit Test Conditions

V

IH

Input HIGH Voltage 2.0 V

Guaranteed Input HIGH Voltage for
All Inputs

V

IL

Input LOW Voltage

0.8
V

Guaranteed Input LOW Voltage for
All Inputs

V

IK

Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA

V

OH

Output HIGH Voltage 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = V

IH

or VIL per Truth Table

p

0.25 0.4 V IOL = 12 mA

VCC = VCC MIN,

VOLOutput LOW Voltage

0.35 0.5 V IOL = 24 mA

V

IN

=

V

IL

or

V

IH

per Truth Table

20 µA VCC = MAX, VIN = 2.7 V

I

IH

Input HIGH Current

LS682-Q Inputs 0.1 mA VCC = MAX, VIN = 5.5 V
Others 0.1 mA VCC = MAX, VIN = 7.0 V

p

LS682-Q Inputs –0.4 mA

IILInput LOW Current

Others –0.2 mA

V

CC

=

MAX, V

IN

= 0.4

V

I

OS

Short Circuit Current (Note 1) –30 –130 mA VCC = MAX

LS682 70 mA

I

CC

Power Supply
Current

LS684 65 mA

VCC = MAX

Current

LS688 65 mA

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