SN54HC684, SN74HC684
8-BIT MAGNITUDE COMPARATORS
SCLS340B – MARCH 1996 – REVISED MARCH 2003
D
D
D
D
D
D
D
Wide Operating Voltage Range of 2 V to 6 V
High-Current Outputs Drive Up To 10
LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 22 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Compare Two 8-Bit Words
SN54HC684 . . . FK PACKAGE
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
P=Q
Q7
P7
Q6
P6
Q5
P5
Q4
P4
P1
Q1
P2
Q2
P3
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
Q7
P7
Q6
P6
Q5
Q3
GND
P4
Q4
P5
P>Q
P0
Q0
P1
Q1
P2
Q2
P3
Q3
GND
Q0
P0
P>Q
VCC
P=Q
SN54HC684 . . . J OR W PACKAGE
SN74HC684 . . . DW OR N PACKAGE
(TOP VIEW)
description/ordering information
These magnitude comparators perform comparisons of two 8-bit binary or BCD words. These devices provide
P = Q and P > Q outputs.
ORDERING INFORMATION
PDIP – N
–40°C to 85°C
–55°C to 125°C
ORDERABLE
PART NUMBER
PACKAGE†
TA
TOP-SIDE
MARKING
Tube
SN74HC684N
Tube
SN74HC684DW
Tape and reel
SN74HC684DWR
CDIP – J
Tube
SNJ54HC684J
SNJ54HC684J
CFP – W
Tube
SNJ54HC684W
SNJ54HC684W
LCCC – FK
Tube
SNJ54HC684FK
SNJ54HC684FK
SOIC – DW
SN74HC684N
HC684
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
FUNCTION TABLE
DATA
INPUTS
P, Q
OUTPUTS
P=Q
P>Q
P=Q
L
H
P>Q
H
L
P Q to a 2-input NAND
gate.
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.
Copyright 2003, Texas Instruments Incorporated
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
1
SN54HC684, SN74HC684
8-BIT MAGNITUDE COMPARATORS
SCLS340B – MARCH 1996 – REVISED MARCH 2003
logic diagram (positive logic)
19
P0
Q0
P1
Q1
P2
Q2
P3
Q3
P4
Q4
P5
Q5
P6
Q6
P7
Q7
2
P=Q
2
3
4
5
6
7
8
9
11
12
1
13
14
15
16
17
18
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
P>Q
SN54HC684, SN74HC684
8-BIT MAGNITUDE COMPARATORS
SCLS340B – MARCH 1996 – REVISED MARCH 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
† 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 51-7.
recommended operating conditions (see Note 3)
SN54HC684
VCC
VIH
Supply voltage
High-level input voltage
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
VCC = 2 V
VIL
VI
VO
tt
Low-level input voltage
MAX
2
5
6
MIN
NOM
MAX
2
5
6
1.5
1.5
3.15
3.15
4.2
4.2
0
Output voltage
Input transition (rise and fall) times
NOM
VCC = 4.5 V
VCC = 6 V
Input voltage
SN74HC684
MIN
0
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
0.5
1.35
1.35
1.8
1.8
0
0
V
V
0.5
VCC
VCC
UNIT
VCC
VCC
1000
1000
500
500
400
400
V
V
V
ns
TA
Operating free-air temperature
–55
125
–40
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
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
3
SN54HC684, SN74HC684
8-BIT MAGNITUDE COMPARATORS
SCLS340B – MARCH 1996 – REVISED MARCH 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
IOH = –20 µA
VOH
VI = VIH or VIL
IOH = –4 mA
IOH = –5.2 mA
IOL = 20 µA
VOL
VI = VIH or VIL
IOL = 4 mA
IOL = 5.2 mA
IIH
IIL
VI = VCC
VI = 0
ICC
Ci
VI = VCC or 0,
IO = 0
MIN
TA = 25°C
TYP
MAX
SN54HC684
MIN
MAX
SN74HC684
MIN
2V
1.9
1.998
1.9
1.9
4.5 V
4.4
4.499
4.4
4.4
6V
5.9
5.999
5.9
5.9
4.5 V
3.98
4.30
3.7
3.84
6V
5.48
5.80
5.2
MAX
UNIT
V
5.34
2V
0.002
0.1
0.1
0.1
4.5 V
0.001
0.1
0.1
0.1
6V
0.001
0.1
0.1
0.1
4.5 V
0.17
0.26
0.4
0.33
6V
0.15
0.26
0.4
0.33
6V
0.1
100
1000
1000
6V
–0.1
–100
–1000
–1000
nA
8
160
80
µA
10
10
10
pF
6V
2 V to 6 V
3
V
nA
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
TA = 25°C
MIN
TYP
MAX
2V
130
275
413
344
tpd
P or Q
Any
4.5 V
26
55
88
69
6V
22
47
70
58
2V
38
75
110
95
4.5 V
8
15
22
19
6V
6
13
19
16
tt
Any
SN54HC684
MIN
MAX
SN74HC684
MIN
MAX
UNIT
ns
ns
operating characteristics, TA = 25°C
PARAMETER
Cpd
Power dissipation capacitance
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
TEST CONDITIONS
TYP
UNIT
No load
40
pF
SN54HC684, SN74HC684
8-BIT MAGNITUDE COMPARATORS
SCLS340B – MARCH 1996 – REVISED MARCH 2003
PARAMETER MEASUREMENT INFORMATION
From Output
Under Test
Test
Point
Input
VCC
50%
50%
0V
CL = 50 pF
(see Note A)
tPLH
In-Phase
Output
LOAD CIRCUIT
50%
10%
tPHL
90%
90%
tr
Input
50%
10%
90%
90%
tr
tPHL
VCC
50%
10% 0 V
Out-of-Phase
Output
90%
tf
VOH
50%
10%
VOL
tf
tPLH
50%
10%
tf
50%
10%
90%
VOH
VOL
tr
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
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. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
SN74HC684DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC684
Samples
SN74HC684N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74HC684N
Samples
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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