INPUTS
SN54HC682, SN74HC682
8-BIT MAGNITUDE COMPARATORS
SCLS018C – MARCH 1984 – REVISED MA Y 1997
D
Compare Two 8-Bit Words
D
100-kΩ Pullup Resistors Are on the
Q Inputs
D
Package Options Include Plastic
Small-Outline (DW) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
These magnitude comparators perform
comparisons of two 8-bit binary or BCD words.
The ’HC682 feature 100-kΩ pullup termination
resistors on the Q inputs for analog or switch data.
The SN54HC682 is characterized for operation
over the full military temperature range of –55°C
to 125°C. The SN74HC682 is characterized for
operation from –40°C to 85°C.
FUNCTION TABLE
DATA
P, Q
P = Q L H
P > Q H L
P < Q H H
The P < Q function can be
generated by applying P = Q
and P > Q to a 2-input NAND
gate.
OUTPUTS
P = Q P > Q
SN54HC682 ...J OR W PACKAGE
SN74HC682 . . . DW OR N PACKAGE
P > Q
SN54HC682 . . . FK PACKAGE
P1
Q1
P2
Q2
P3
(TOP VIEW)
1
P0
2
Q0
3
P1
4
Q1
5
P2
6
Q2
7
P3
8
Q3
9
GND
10
(TOP VIEW)
Q0
3212019
4
5
6
7
8
910111213
Q3
P0
20
19
18
17
16
15
14
13
12
11
P > Q
VCCP = Q
P4
Q4
V
CC
P = Q
Q7
P7
Q6
P6
Q5
P5
Q4
P4
18
17
16
15
14
P5
Q7
P7
Q6
P6
Q5
GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1997, Texas Instruments Incorporated
1
SN54HC682, SN74HC682
8-BIT MAGNITUDE COMPARATORS
SCLS018C – MARCH 1984 – REVISED MA Y 1997
logic symbol
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
†
P0
P1
P2
P3
P4
P5
P6
P7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
4
6
8
11
13
15
17
3
5
7
9
12
14
16
18
COMP
0
P = Q
P
7
0
P > Q
Q
7
19
P = Q
1
P > Q
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
2
P0
3
Q0
4
P1
5
Q1
6
P2
SN54HC682, SN74HC682
8-BIT MAGNITUDE COMPARATORS
SCLS018C – MARCH 1984 – REVISED MA Y 1997
19
P=Q
Q2
P3
Q3
P4
Q4
P5
Q5
P6
Q6
P7
7
8
9
11
12
13
14
15
16
17
1
P>Q
Q7
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
3
SN54HC682, SN74HC682
UNIT
8-BIT MAGNITUDE COMPARATORS
SCLS018C – MARCH 1984 – REVISED MA Y 1997
absolute maximum ratings over operating free-air temperature range
Supply voltage range, V
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CC
†
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, IO (VO = 0 to VCC) ±25 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package 97°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package 67°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace
length of zero.
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
stg
recommended operating conditions
SN54HC682 SN74HC682
MIN NOM MAX MIN NOM MAX
V
V
V
V
V
t
t
T
Supply voltage 2 5 6 2 5 6 V
CC
VCC = 2 V 1.5 1.5
High-level input voltage
IH
Low-level input voltage
IL
Input voltage 0 V
I
Output voltage 0 V
O
Input transition (rise and fall) time
Operating free-air temperature –55 125 –40 85 °C
A
VCC = 4.5 V
VCC = 6 V 4.2 4.2
VCC = 2 V 0 0.5 0 0.5
VCC = 4.5 V
VCC = 6 V 0 1.8 0 1.8
VCC = 2 V 0 1000 0 1000
VCC = 4.5 V
VCC = 6 V 0 400 0 400
3.15 3.15
0 1.35 0 1.35
CC
CC
0 500 0 500
0 V
0 V
CC
CC
V
V
V
V
ns
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PARAMETER
TEST CONDITIONS
V
UNIT
I
V
0
PARAMETER
V
UNIT
SN54HC682, SN74HC682
8-BIT MAGNITUDE COMPARATORS
SCLS018C – MARCH 1984 – REVISED MA Y 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
TA = 25°C SN54HC682 SN74HC682
MIN TYP MAX MIN MAX MIN MAX
V
V
V
V
I
I
C
OH
OL
IH
IL
CC
i
CC
2 V 1.9 1.998 1.9 1.9
IOH = –20 µA
VI = VIH or V
VI = VIH or V
VI = V
=
I
VI = VCC or 0, IO = 0 6 V 480 700 1300 1100 µA
IL
IOH = –4 mA 4.5 V 3.98 4.3 3.7 3.84
IOH = –5.2 mA 6 V 5.48 5.8 5.2 5.34
IOL = 20 µA
IL
IOL = 4 mA 4.5 V 0.17 0.26 0.4 0.33
IOL = 5.2 mA 6 V 0.15 0.26 0.4 0.33
CC
Q inputs 6 V –50 –90 –160 –140 µA
All other inputs 6 V –0.1 –100 –1000 –1000 nA
4.5 V 4.4 4.499 4.4 4.4
6 V 5.9 5.999 5.9 5.9
2 V 0.002 0.1 0.1 0.1
4.5 V 0.001 0.1 0.1 0.1
6 V 0.001 0.1 0.1 0.1
6 V 0.1 100 1000 1000 nA
2 V to 6 V 3 10 10 10 pF
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
FROM TO
(INPUT) (OUTPUT)
t
pd
t
t
P or Q Any
Any
CC
2 V 130 275 413 344
4.5 V 26 55 88 69
6 V 22 47 70 58
2 V 38 75 110 95
4.5 V 8 15 22 19
6 V 6 13 19 16
TA = 25°C SN54HC682 SN74HC682
MIN TYP MAX MIN MAX MIN MAX
ns
ns
operating characteristics, TA = 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
Power dissipation capacitance No load 40 pF
pd
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
5
SN54HC682, SN74HC682
8-BIT MAGNITUDE COMPARATORS
SCLS018C – MARCH 1984 – REVISED MA Y 1997
PARAMETER MEASUREMENT INFORMATION
Input
From Output
Under Test
LOAD CIRCUIT
90% 90%
t
r
Test
Point
CL = 50 pF
(see Note A)
50%50%
10%10%
V
Input
In-Phase
Output
V
CC
0 V
t
f
Out-of-Phase
Output
50%
t
t
PLH
PHL
50%
t
PHL
90% 90%
t
r
t
PLH
50% 50%
10% 10%
t
f
50%50%
CC
0 V
V
OH
10%10%
V
OL
t
f
V
OH
90%90%
V
OL
t
r
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
NOTES: A. CL includes probe and test-fixture capacitance.
B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
C. The outputs are measured one at a time with one input transition per measurement.
D. t
PLH
and t
are the same as tpd.
PHL
Figure 1. Load Circuit and Voltage Waveforms
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
VOLTAGE WAVEFORMS
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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Copyright 1998, Texas Instruments Incorporated
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