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 k pullup resistor on the Q inputs for analog or switch data.
OUTPUT ENABLE no no yes OUTPUT CONFIGURATION totem-pole totem-pole totem-pole
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LOW POWER SCHOTTKY
TYPE LS682 LS684 LS688
P=Q yes yes yes
P>Q yes yes no
PULLUP yes no no
20
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL Parameter Supply Voltage Operating Ambient Temperature Range Output Current - High Output Current - Low Min 4.75 0 Typ 5.0 25 Max 5.25 70 - 0.4 24 Unit V C mA mA
1
PLASTIC N SUFFIX CASE 738
20 1
SOIC DW SUFFIX CASE 751D
ORDERING INFORMATION
Device SN74LS682N SN74LS682DW SN74LS684N SN74LS684DW SN74LS688N SN74LS688DW Package 16 Pin DIP 16 Pin 16 Pin DIP 16 Pin 16 Pin DIP 16 Pin Shipping 1440 Units/Box 2500/Tape & Reel 1440 Units/Box 2500/Tape & Reel 1440 Units/Box 2500/Tape & Reel
(c) Semiconductor Components Industries, LLC, 1999
1
December, 1999 - Rev. 6
Publication Order Number: SN74LS682/D
SN74LS682 SN74LS684 SN74LS688
CONNECTION DIAGRAMS (TOP VIEW)
VCC P=Q 20 19 Q7 18 P7 17 Q6 16 P6 15 Q5 14 P5 13 Q4 12 P4 11
SN74LS682/684
1 P>Q
2 P0
3 Q0
4 P1
5 Q1
6 P2
7 Q2
8 P3
9 Q3
10 GND
VCC P=Q 20 19
Q7 18
P7 17
Q6 16
P6 15
Q5 14
P5 13
Q4 12
P4 11
SN74LS688
1 G
2 P0
3 Q0
4 P1
5 Q1
6 P2
7 Q2
8 P3
9 Q3
10 GND
FUNCTION TABLE
INPUTS DATA P, Q P=Q P>Q PQ H L H H OUTPUTS
H = HIGH Level, L = LOW Level, X = Irrelevant
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SN74LS682 SN74LS684 SN74LS688
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOH Parameter Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage 2.7 - 0.65 3.5 0.25 VO OL Output LOW Voltage 0.35 0.5 20 IIH Input HIGH Current LS682-Q Inputs Others LS682-Q Inputs IIL IOS Input LOW Current Others Short Circuit Current (Note 1) LS682 ICC Power S P Supply l Current LS684 LS688 - 30 - 0.2 - 130 70 65 65 mA mA mA mA mA VCC = MAX 0.1 0.1 - 0.4 V A mA mA mA VCC = MAX, VIN = 0 4 V MAX 0.4 VCC = MAX IOL = 24 mA 0.4 Min 2.0 0.8 - 1.5 Typ Max Unit V V V V V Test Conditions Guaranteed Input HIGH Voltage for All Inputs Guaranteed Input LOW Voltage for All Inputs VCC = MIN, IIN = - 18 mA VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table IOL = 12 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table
VCC = MAX, VIN = 2.7 V VCC = MAX, VIN = 5.5 V VCC = MAX, VIN = 7.0 V
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
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SN74LS682 SN74LS684 SN74LS688
LOGIC DIAGRAMS
P7 Q7 P6 Q6 P5 Q5 P4 Q4 P3 Q3 P2 Q2 P1 Q1 P0 Q0
(17) (18) (15) (16) (13) (14) (11) (12) (8) (9) (6) (7) (4) (5) (2) (3) (19)
P7 Q7 P6 Q6 P5 Q5 P4 Q4 P3 Q3 P2 Q2 P1
(1)
(17) (18) (15) (16) (13) (14) (11) (12) (8) (9) (6) (7) (4) (5) (2) (3)
(19)
P=Q
P=Q
Q1 P0 Q0
P>Q
G
(1)
SN74LS682 and LS684
SN74LS688
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SN74LS682 SN74LS684 SN74LS688
AC CHARACTERISTICS (TA = 25C) SN74LS682
Limits Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Parameter Propagation Delay, P to P = Q Propagation Delay, Q to P = Q Propagation Delay, P to P > Q Propagation Delay, Q to P > Q Min Typ 13 15 14 15 20 15 21 19 Max 25 25 25 25 30 30 30 30 Unit ns ns ns ns Test Conditions
VCC = 5.0 V F CL = 45 pF RL = 667
SN74LS684
Limits Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Parameter Propagation Delay, P to P = Q Propagation Delay, Q to P = Q Propagation Delay, P to P > Q Propagation Delay, Q to P > Q Min Typ 15 17 16 15 22 17 24 20 Max 25 25 25 25 30 30 30 30 Unit ns ns ns ns Test Conditions
VCC = 5.0 V F CL = 45 pF RL = 667
SN74LS688
Limits Symbol tPLH tPHL tPLH tPHL tPLH tPHL Parameter Propagation Delay, P to P = Q Propagation Delay, Q to P = Q Propagation Delay, G , G1 to P = Q Min Typ 12 17 12 17 12
13
Max 18 23 18 23 18 20
Unit ns ns ns
Test Conditions
VCC = 5.0 V CL = 45 pF RL = 667
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SN74LS682 SN74LS684 SN74LS688
PACKAGE DIMENSIONS
N SUFFIX PLASTIC PACKAGE CASE 738-03 ISSUE E
-A-
20 11 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. 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 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
B
1 10
C
L
-T-
SEATING PLANE
K M E G F D
20 PL
N J 0.25 (0.010)
M 20 PL
0.25 (0.010) TA
M
M
TB
M
DIM A B C D E F G J K L M N
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SN74LS682 SN74LS684 SN74LS688
PACKAGE DIMENSIONS
D SUFFIX PLASTIC SOIC PACKAGE CASE 751D-05 ISSUE F
D A
11 X 45 _
q
NOTES: 1. DIMENSIONS ARE IN MILLIMETERS. 2. INTERPRET DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. 3. DIMENSIONS D AND E DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE. 5. DIMENSION B DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE PROTRUSION SHALL BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT MAXIMUM MATERIAL CONDITION. MILLIMETERS MIN MAX 2.35 2.65 0.10 0.25 0.35 0.49 0.23 0.32 12.65 12.95 7.40 7.60 1.27 BSC 10.05 10.55 0.25 0.75 0.50 0.90 0_ 7_
H
M
B
M
20
10X
0.25
E
1
10
h
20X
B 0.25
M
B TA
S
B
S
A
SEATING PLANE
DIM A A1 B C D E e H h L
L
18X
e
A1
q
T
C
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SN74LS682 SN74LS684 SN74LS688
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SN74LS682/D
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