SN54HC574, SN74HC574
SCLS148H – DECEMBER 1982 – REVISED MAY 2022
SNx4HC574 Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs
1 Features
2 Description
•
•
These octal edge-triggered D-type flip-flops feature
3-state outputs designed specifically for bus driving.
They are particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
•
•
•
•
•
•
Wide Operating Voltage Range of 2 V to 6 V
High-Current 3-State Noninverting Outputs Drive
Bus Lines Directly or Up to 15 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 22 ns
±6-mA Output Drive at 5 V
Low Input Current of 1-µA Max
Bus-Structured Pinout
On Products Compliant to MIL-PRF-38535,
All Parameters Are Tested Unless Otherwise
Noted. On All Other Products, Production
Processing Does Not Necessarily Include Testing
of All Parameters.
Device Information
(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SN74HC574DW
SOIC (20)
12.80 mm × 7.50 mm
SN74HC574DBR
SSOP (20)
7.20 mm × 5.30 mm
SN74HC574N
PDIP (20)
25.40 mm × 6.35 mm
SN74HC574NSR
SO (20)
15.00 mm × 5.30 mm
SN74HC574PW
TSSOP (20)
6.50 mm × 4.40 mm
SN54HC574J
CDIP (20)
26.92 mm × 6.92 mm
SNJ54HC574FK
LCCC (20)
8.89 mm × 8.45 mm
SNJ54HC574W
CFP (20)
13.72 mm × 6.92 mm
(1)
For all available packages, see the orderable addendum at
the end of the data sheet.
Functional Block Diagram
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
SN54HC574, SN74HC574
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
Table of Contents
1 Features............................................................................1
2 Description.......................................................................1
3 Revision History.............................................................. 2
4 Pin Configuration and Functions...................................3
5 Specifications.................................................................. 4
5.1 Absolute Maximum Ratings........................................ 4
5.2 Recommended Operating Conditions.........................4
5.3 Thermal Information....................................................4
5.4 Electrical Characteristics.............................................5
5.5 Timing Requirements.................................................. 5
5.6 Switching Characteristics............................................6
5.7 Switching Characteristics............................................6
5.8 Operating Characteristics........................................... 6
6 Parameter Measurement Information............................ 7
7 Detailed Description........................................................8
7.1 Overview..................................................................... 8
7.2 Functional Block Diagram........................................... 8
7.3 Device Functional Modes............................................8
8 Power Supply Recommendations..................................9
9 Layout...............................................................................9
9.1 Layout Guidelines....................................................... 9
10 Device and Documentation Support..........................10
10.1 Receiving Notification of Documentation Updates..10
10.2 Support Resources................................................. 10
10.3 Trademarks............................................................. 10
10.4 Electrostatic Discharge Caution..............................10
10.5 Glossary..................................................................10
11 Mechanical, Packaging, and Orderable
Information.................................................................... 10
3 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision G (December 2021) to Revision H (May 2022)
Page
• Junction-to-ambient thermal resistance values increased. DW was 58 is now 109.1, DB was 70 is now 122.7,
N was 69 is now 84.6, NS was 60 is now 113.4, PW was 83 is now 131.8........................................................ 4
Changes from Revision F (August 2003) to Revision G (December 2021)
Page
• Updated the numbering, formatting, tables, figures, and cross-references throughout the document to reflect
modern data sheet standards............................................................................................................................. 1
2
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
4 Pin Configuration and Functions
J, W, DB, DW, N, NS, or PW package
20-Pin CDIP, CFP, SSOP, SOIC, PDIP, SO, or TSSOP
Top View
FK package
20-Pin LCCC
Top View
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
5 Specifications
5.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
VCC
Supply voltage range
current(2)
MIN
MAX
–0.5
7
UNIT
V
IIK
Input clamp
VI < 0 or VI > VCC
±20
mA
IOK
Output clamp current(2)
VO < 0 or VO > VCC
±20
mA
IO
Continuous output current
VO = 0 to VCC
±35
mA
±70
mA
150
°C
150
°C
Continuous current through each VCC or GND
TJ
Junction temperature
Tstg
Storage temperature range
(1)
(2)
– 65
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.
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
5.2 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)(1)
SN54HC574
VCC
Supply voltage
VIH
High-level input voltage
MIN
NOM
MAX
MIN
NOM
MAX
2
5
6
2
5
6
VCC = 2 V
VCC = 4.5 V
SN74HC574
1.5
1.5
3.15
3.15
VCC = 6 V
4.2
Low-level input voltage
V
V
4.2
VCC = 2 V
VIL
UNIT
VCC = 4.5 V
VCC = 6 V
0.5
0.5
1.35
1.35
1.8
1.8
V
VI
Input voltage
0
VCC
0
VCC
V
VO
Output voltage
0
VCC
0
VCC
V
tt
Input transition rise/fall time
TA
Operating free-air temperature
VCC = 2 V
1000
1000
500
500
VCC = 4.5 V
VCC = 6 V
(1)
400
–55
125
ns
400
–40
85
°C
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.
5.3 Thermal Information
SN74HC574
THERMAL METRIC
4
DW (SOIC)
DB (SSOP)
N (PDIP)
NS (SO)
PW (TSSOP)
20 PINS
20 PINS
20 PINS
20 PINS
20 PINS
UNIT
109.1
122.7
84.6
113.4
131.8
°C/W
76
81.6
72.5
78.6
72.2
°C/W
RθJA
Junction-to-ambient thermal
(1)
resistance
RθJC (top)
Junction-to-case (top) thermal
resistance
RθJB
Junction-to-board thermal
resistance
77.6
77.5
65.3
78.4
82.8
°C/W
ΨJT
Junction-to-top characterization
parameter
51.5
46.1
55.3
47.1
21.5
°C/W
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
5.3 Thermal Information (continued)
SN74HC574
DW (SOIC)
DB (SSOP)
N (PDIP)
NS (SO)
PW (TSSOP)
20 PINS
20 PINS
20 PINS
20 PINS
20 PINS
UNIT
THERMAL METRIC
ΨJB
Junction-to-board
characterization parameter
77.1
77.1
65.2
78.1
82.4
°C/W
RθJC(bot)
Junction-to-case (bottom)
thermal resistance
N/A
N/A
N/A
N/A
N/A
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC package thermal metrics application
report.
5.4 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = –20 µA
VOH
VI = VIH or VIL
IOH = –6 mA
IOH = –7.8 mA
VOL
IOZ
VO = VCC or 0
ICC
VI = VCC or 0,
MAX
MIN
SN74HC574
MIN
TYP
MAX
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
4.3
3.7
3.84
6V
5.48
5.8
5.2
5.34
MAX
UNIT
V
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
IOL = 6 mA
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
nA
6V
±0.01
±0.5
±10
±5
µA
8
160
80
µA
10
10
10
pF
IOL = 7.8 mA
VI = VCC or 0
SN54HC574
IOL = 20 µA
VI = VIH or VIL
II
TA = 25°C
VCC
IO = 0
6V
Ci
2 V to 6 V
3
V
5.5 Timing Requirements
over recommended operating free-air temperature range (unless otherwise noted)
VCC
fclock
Clock frequency
TA = 25°C
MIN
tsu
th
Pulse duration, CLK high or low
Setup time, data before CLK↑
Hold time, data after CLK↑
MIN
SN74HC574
MAX
MIN
MAX
2V
6
4
5
4.5 V
30
20
24
6V
tw
SN54HC574
MAX
38
24
UNIT
MHz
28
2V
80
120
100
4.5 V
16
24
20
6V
14
20
17
2V
100
150
125
4.5 V
20
30
25
6V
17
26
21
2V
5
5
5
4.5 V
5
5
5
6V
5
5
5
ns
ns
ns
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
5.6 Switching Characteristics
over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 6-1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
fmax
tpd
ten
tdis
CLK
Any Q
OE
Any Q
OE
Any Q
tt
Any Q
TA = 25°C
SN54HC574
MAX
MIN
SN74HC574
MIN
TYP
MAX
MIN
2V
6
11
4
5
4.5 V
30
36
20
24
6V
36
40
24
28
UNIT
MAX
MHz
2V
90
180
270
225
4.5 V
28
36
54
45
6V
24
31
46
38
2V
77
150
225
190
4.5 V
26
30
45
38
6V
23
26
38
32
2V
52
150
225
190
4.5 V
24
30
45
38
6V
22
26
38
32
2V
28
60
90
75
4.5 V
8
12
18
15
6V
6
10
15
13
ns
ns
ns
ns
5.7 Switching Characteristics
over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 6-1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
fmax
tpd
ten
CLK
Any Q
OE
Any Q
tt
Any Q
TA = 25°C
MIN
TYP
SN54HC574
MAX
MIN
SN74HC574
MAX
MIN
2V
6
5
4.5 V
30
24
6V
36
MAX
UNIT
MHz
28
2V
105
265
400
330
4.5 V
36
53
80
66
6V
31
46
68
57
2V
95
235
355
295
4.5 V
32
47
71
59
6V
28
41
60
51
2V
60
210
315
265
4.5 V
17
42
63
53
6V
14
36
53
45
ns
ns
ns
5.8 Operating Characteristics
TA = 25°C
PARAMETER
Cpd
6
Power dissipation capacitance per flip-flop
TEST CONDITIONS
TYP
UNIT
No load
100
pF
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
6 Parameter Measurement Information
VCC
From Output
Under Test
CL
(see Note A)
PARAMETER
S1
Test
Point
tPZH
ten
RL
RL
1 kΩ
tPZL
tPHZ
tdis
tPLZ
S2
Reference
Input
VCC
50%
Data
Input
VCC
50%
10%
50%
50%
0V
In-Phase
Output
50%
10%
tPHL
90%
90%
tr
tPHL
Out-ofPhase
Output
90%
Output
Control
(Low-Level
Enabling)
50%
10%
tf
Closed
Closed
Open
Open
Open
VCC
th
90%
90%
VCC
50%
10% 0 V
tf
VCC
50%
50%
0V
tPZL
VOH
50%
10% V
OL
tf
Output
Waveform 1
(See Note B)
VOH
Output
Waveform 2
(See Note B)
90%
VOL
tPLZ
≈VCC
50%
≈VCC
10%
tPZH
tPLH
50%
10%
Open
VOLTAGE WAVEFORMS
SETUP AND HOLD AND INPUT RISE AND FALL TIMES
VCC
tPLH
Open
tr
VOLTAGE WAVEFORMS
PULSE DURATIONS
50%
Closed
0V
0V
Input
Closed
tsu
0V
50%
Open
50%
50%
tw
Low-Level
Pulse
S2
50 pF
or
150 pF
−−
LOAD CIRCUIT
High-Level
Pulse
S1
50 pF
1 kΩ
tpd or tt
CL
50 pF
or
150 pF
VOL
tPHZ
50%
90%
VOH
≈0 V
tr
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
NOTES: A. CL includes probe and test-fixture capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. 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.
D. For clock inputs, fmax is measured when the input duty cycle is 50%.
E. The outputs are measured one at a time with one input transition per measurement.
F. t PLZ and tPHZ are the same as tdis.
G. tPZL and tPZH are the same as ten.
H. tPLH and tPHL are the same as tpd.
Figure 6-1. Load Circuit and Voltage Waveforms
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
7 Detailed Description
7.1 Overview
These octal edge-triggered D-type flip-flops feature 3-state outputs designed specifically for bus driving. They
are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working
registers.
The eight flip-flops enter data on the low-to-high transition of the clock (CLK) input.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high
or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive
the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus lines
without interface or pullup components.
OE does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
7.2 Functional Block Diagram
Figure 7-1. Functional Block Diagram
7.3 Device Functional Modes
Function Table
(Each Flip-Flop)
INPUTS
8
OE
CLK
D
OUTPUT
Q
L
↑
H
H
L
↑
L
L
L
H or L
X
Q0
H
X
X
Z
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
8 Power Supply Recommendations
The power supply can be any voltage between the minimum and maximum supply voltage rating located in the
Recommended Operating Conditions. Each VCC terminal should have a good bypass capacitor to prevent power
disturbance. A 0.1-μF capacitor is recommended for this device. It is acceptable to parallel multiple bypass caps
to reject different frequencies of noise. The 0.1-μF and 1-μF capacitors are commonly used in parallel. The
bypass capacitor should be installed as close to the power terminal as possible for best results.
9 Layout
9.1 Layout Guidelines
When using multiple-input and multiple-channel logic devices inputs must not ever be left floating. In many
cases, functions or parts of functions of digital logic devices are unused; for example, when only two inputs of a
triple-input AND gate are used or only 3 of the 4 buffer gates are used. Such unused input pins must not be left
unconnected because the undefined voltages at the outside connections result in undefined operational states.
All unused inputs of digital logic devices must be connected to a logic high or logic low voltage, as defined by the
input voltage specifications, to prevent them from floating. The logic level that must be applied to any particular
unused input depends on the function of the device. Generally, the inputs are tied to GND or VCC, whichever
makes more sense for the logic function or is more convenient.
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SCLS148H – DECEMBER 1982 – REVISED MAY 2022
10 Device and Documentation Support
10.1 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on
Subscribe to updates to register and receive a weekly digest of any product information that has changed. For
change details, review the revision history included in any revised document.
10.2 Support Resources
TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight
from the experts. Search existing answers or ask your own question to get the quick design help you need.
Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do
not necessarily reflect TI's views; see TI's Terms of Use.
10.3 Trademarks
TI E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
10.4 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled
with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric changes could cause the device not to meet its published
specifications.
10.5 Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.
11 Mechanical, Packaging, and Orderable Information
The following pages include mechanical packaging and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser based versions of this data sheet, refer to the left hand navigation.
10
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PACKAGE OPTION ADDENDUM
www.ti.com
2-Dec-2023
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)
JM38510/65604BRA
ACTIVE
CDIP
J
20
20
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
65604BRA
Samples
M38510/65604BRA
ACTIVE
CDIP
J
20
20
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
65604BRA
Samples
SN54HC574J
ACTIVE
CDIP
J
20
20
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
SN54HC574J
Samples
SN74HC574APWR
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574A
Samples
SN74HC574DBR
ACTIVE
SSOP
DB
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
Samples
SN74HC574DBRG4
ACTIVE
SSOP
DB
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
Samples
SN74HC574DWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
Samples
SN74HC574N
ACTIVE
PDIP
N
20
20
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74HC574N
Samples
SN74HC574NE4
ACTIVE
PDIP
N
20
20
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74HC574N
Samples
SN74HC574NSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
Samples
SN74HC574PW
LIFEBUY
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
SN74HC574PWR
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
Samples
SN74HC574PWRG4
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
Samples
SN74HC574PWT
LIFEBUY
TSSOP
PW
20
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC574
SNJ54HC574FK
ACTIVE
LCCC
FK
20
55
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
SNJ54HC
574FK
Samples
SNJ54HC574J
ACTIVE
CDIP
J
20
20
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
SNJ54HC574J
Samples
SNJ54HC574W
ACTIVE
CFP
W
20
25
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
SNJ54HC574W
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.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
2-Dec-2023
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