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 SN54/74LS684 SN54/74LS688
8-BIT MAGNITUDE COMPARATORS
LOW POWER SCHOTTKY
VCC P=Q 20 19
Q7 18
P7 17
Q6 16
P6 15
Q5 14
P5 13
Q4 12
P4 11
20 1
J SUFFIX CERAMIC CASE 732-03
SN54/74LS682/684
N SUFFIX PLASTIC CASE 738-03
1
1 P>Q
2 P0
3 Q0
4 P1
5 Q1
6 P2
7 Q2
8 P3
9 Q3
10 GND
20
VCC P=Q 20 19
Q7 18
P7 17
Q6 16
P6 15
Q5 14
P5 13
Q4 12
P4 11
20 1
DW SUFFIX SOIC CASE 751D-03
SN54/74LS688
ORDERING INFORMATION
SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC
1 G
2 P0
3 Q0
4 P1
5 Q1
6 P2
7 Q2
8 P3
9 Q3
10 GND
FUNCTION TABLE
INPUTS 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 DATA PULLUP yes no no P, Q P=Q P>Q PQ H L H H OUTPUTS
H = HIGH Level, L = LOW Level, X = Irrelevant
FAST AND LS TTL DATA 5-603
SN54/74LS682 * SN54/74LS684 * SN54/74LS688
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current -- High Output Current -- Low Parameter 54 74 54 74 54, 74 54 74 Min 4.5 4.75 - 55 0 Typ 5.0 5.0 25 25 Max 5.5 5.25 125 70 -0.4 12 24 Unit V C mA mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits Symbol VIH VIL VIK VOH Parameter Input HIGH Voltage 54 Input LOW Voltage 74 Input Clamp Diode Voltage 54 Output HIGH Voltage 74 54, 74 VOL Output LOW Voltage 74 0.35 0.5 20 IIH Input HIGH Current LS628-Q Inputs Others LS682-Q Inputs IIL IOS Input LOW Current Others Short Circuit Current (Note 1) LS682 ICC Power Supply 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 VCC = MAX 2.7 3.5 0.25 0.4 V V 2.5 - 0.65 3.5 0.8 - 1.5 V V Min 2.0 0.7 V Typ Max Unit 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 IOL = 24 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.
FAST AND LS TTL DATA 5-604
SN54/74LS682 * SN54/74LS684 * SN54/74LS688
LOGIC DIAGRAMS
P7 Q7 P6 Q6 P5 Q5 P4 Q4 P3 Q3 P2 Q2 P1 Q1 P0 Q0
(17) (18)
P7
(15) (16) (13) (14) (11) (12) (8) (9) (6) (7) (4) (5) (2) (3) (19)
(17)
(18) Q7 (15)
P6
Q6
(16)
P=Q
P5
(13)
Q5
(14)
P4
(11)
Q4
(12)
(19)
P3
(8)
P=Q (9)
Q3
P2
(6)
Q2
(7)
P1
(4)
Q1
(1)
(5)
P>Q
P0
(2)
Q0
(3)
G
(1)
SN54 / 74LS682 thru LS684
SN54 / 74LS688
FAST AND LS TTL DATA 5-605
SN54/74LS682*SN54/74LS684*SN54/74LS688
AC CHARACTERISTICS (TA = 25C) SN54/74LS682
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 CL = 45 pF RL = 667
SN54/74LS684
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 CL = 45 pF RL = 667
SN54/74LS688
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 VCC = 5.0 V CL = 45 pF RL = 667 Test Conditions
FAST AND LS TTL DATA 5-606
Case 751D-03 DW Suffix 20-Pin Plastic SO-20 (WIDE) -A20 11
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. 3. CONTROLLING DIMENSION: MILLIMETER. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE.
-B1 10
P
0.25 (0.010)
M
B
M
5.
751D 01, AND 02 OBSOLETE, NEW STANDARD 751D 03.
10 PL
G R X 45 -TC K
M
SEATING PLANE
M D 20 PL
0.25 (0.010) T B
S
F
J
DIM A B C D F G J K M P R
MILLIMETERS MIN MAX
12.65 7.40 2.35 0.35 0.50 12.95 7.60 2.65 0.49 0.90
INCHES MIN MAX
0.499 0.292 0.093 0.014 0.020 0.510 0.299 0.104 0.019 0.035
1.27 BSC 0.25 0.10 0 10.05 0.25 0.32 0.25 7 10.55 0.75
0.050 BSC 0.010 0.004 0 0.395 0.010 0.012 0.009 7 0.415 0.029
A
S
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
20 1
11
2.
MATERIAL CONDITION. DIM L TO CENTER OF LEADS WHEN FORMED PARALLEL.
10
3.
DIM A AND B INCLUDES MENISCUS.
B A F C L
N H D
SEATING PLANE
J M
G
K
DIM A B C D F G H J K L M N
MILLIMETERS MIN MAX
23.88 6.60 3.81 0.38 1.40 25.15 7.49 5.08 0.56 1.65
INCHES MIN MAX
0.940 0.260 0.150 0.015 0.055 0.990 0.295 0.200 0.022 0.065
2.54 BSC 0.51 0.20 3.18 1.27 0.30 4.06
0.100 BSC 0.020 0.008 0.125 0.050 0.012 0.160
7.62 BSC 0 0.25 15 1.02
0.300 BSC 0 0.010 15 0.040
Case 738-03 N Suffix 20-Pin Plastic -A20 1 11 10
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. 3. CONTROLLING DIMENSION: INCH. DIMENSION L" TO CENTER OF LEAD WHEN FORMED PARALLEL.
B C L
4.
DIMENSION B" DOES NOT INCLUDE MOLD FLASH.
5.
738 02 OBSOLETE, NEW STANDARD 738 03.
-TSEATING PLANE
K E G F D 20 PL
0.25 (0.010)
M
N
M J 20 PL
0.25 (0.010) T A
M M
T
B
M
DIM A B C D E F G J K L M N
MILLIMETERS MIN MAX
25.66 6.10 3.81 0.39 27.17 6.60 4.57 0.55
INCHES MIN MAX
1.010 0.240 0.150 0.015 1.070 0.260 0.180 0.022
1.27 BSC 1.27 1.77
0.050 BSC 0.050 0.070
2.54 BSC 0.21 2.80 0.38 3.55
0.100 BSC 0.008 0.110 0.015 0.140
7.62 BSC 0 0.51 15 1.01
0.300 BSC 0 0.020 15 0.040
FAST AND LS TTL DATA 5-607
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Literature Distribution Centers: USA: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. tPZH Open Closed EUROPE: Motorola Ltd.; European Literature Centre; 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. tPZL Closed Open ASIA PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong.
SYMBOL
SW1
SW2
tPLZ
Closed Closed
Closed Closed
tPHZ
FAST AND LS TTL DATA 5-608
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