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SN54AHC574, SN74AHC574
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
SNx4AHC574 Octal Edge-Triggered D-Type Flip-Flops With 3-State Outputs
1 Features
3 Description
•
•
•
The SNx4AHC574 devices are octal edge-triggered
D-type flip-flops that feature 3-state outputs designed
specifically for driving highly capacitive or relatively
low-impedance loads. These devices are particularly
suitable for implementing buffer registers, I/O ports,
bidirectional bus drivers, and working registers.
1
•
•
Operating Range 2-V to 5.5-V VCC
3-State Outputs Drive Bus Lines Directly
Latch-Up Performance Exceeds 250 mA
Per JESD 17
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.
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model
– 200-V Machine Model
– 1000-V Charged-Device Model
Device Information(1)
PART NUMBER
SNx4AHC574
2 Applications
•
•
•
•
•
•
•
•
PACKAGE
BODY SIZE (NOM)
SSOP (20)
7.50 mm × 5.30 mm
TVSOP (20)
5.00 mm × 4.40 mm
SOIC (20)
12.80 mm × 7.50
mm
PDIP (20)
25.40 mm × 6.35
mm
TSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Smart Grids
TVs
Set Top Boxes
Audio
Servers
Surveillance Cameras
Network Switches
Infotainment
4 Simplified Schematic
OE
CLK
C1
1Q
1D
1D
To Seven Other Channels
1
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.
SN54AHC574, SN74AHC574
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features ..................................................................
Applications ...........................................................
Description .............................................................
Simplified Schematic.............................................
Revision History.....................................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
1
2
3
4
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
4
4
4
5
5
5
6
6
7
7
7
8
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Timing Requirements, VCC = 3.3 V ± 0.3 V ..............
Timing Requirements, VCC = 5 V ± 0.5 V .................
Switching Characteristics, VCC = 3.3 V ± 0.3 V ........
Switching Characteristics, VCC = 5 V ± 0.5 V ...........
Noise Characteristics ..............................................
Operating Characteristics........................................
Typical Characteristics ............................................
8
9
Parameter Measurement Information .................. 9
Detailed Description ............................................ 10
9.1
9.2
9.3
9.4
Overview .................................................................
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
10
10
10
10
10 Application and Implementation........................ 11
10.1 Application Information.......................................... 11
10.2 Typical Application ............................................... 11
11 Power Supply Recommendations ..................... 12
12 Layout................................................................... 13
12.1 Layout Guidelines ................................................. 13
12.2 Layout Example .................................................... 13
13 Device and Documentation Support ................. 13
13.1
13.2
13.3
13.4
Related Links ........................................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
13
13
13
13
14 Mechanical, Packaging, and Orderable
Information ........................................................... 13
5 Revision History
Changes from Revision I (July 2003) to Revision J
Page
•
Added Applications, Device Information table, Pin Functions table, ESD Ratings table, Thermal Information table,
Typical Characteristics, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................. 1
•
Deleted Ordering Information table. ....................................................................................................................................... 1
•
Added Military Disclaimer to Features list. ............................................................................................................................. 1
•
Changed MAX operating temperature to 125°C in Recommended Operating Conditions table. ......................................... 4
2
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Product Folder Links: SN54AHC574 SN74AHC574
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SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
6 Pin Configuration and Functions
SN54AHC574 . . . J OR W PACKAGE
SN74AHC574 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
3D
4D
5D
6D
7D
1Q
2D
1D
OE
VCC
VCC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
2Q
3Q
4Q
5Q
6Q
8D
GND
CLK
8Q
7Q
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
SN54AHC574 . . . FK PACKAGE
(TOP VIEW)
Pin Functions
PIN
NO.
NAME
TYPE
DESCRIPTION
1
OE
I
Output Enable Pin
2
1D
I
1D Input
3
2D
I
2D Input
4
3D
I
3D Input
5
4D
I
4D Input
6
5D
I
5D Input
7
6D
I
6D Input
8
7D
I
7D Input
9
8D
I
8D Input
10
GND
—
11
CLK
I
Clock Pin
12
8Q
O
8Q Output
13
7Q
O
7Q Output
14
6Q
O
6Q Output
15
5Q
O
5Q Output
16
4Q
O
4Q Output
17
3Q
O
3Q Output
18
2Q
O
2Q Output
19
1Q
O
1Q Output
20
VCC
—
Power Pin
Ground Pin
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SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
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7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
VCC
MIN
MAX
Supply voltage range
–0.5
7
UNIT
V
(2)
–0.5
7
V
–0.5
VCC + 0.5
VI
Input voltage range
VO
Output voltage range (2)
IIK
Input clamp current
VI < 0
–20
mA
IOK
Output clamp current
VO < 0 or VO > VCC
±20
mA
IO
Continuous output current
VO = 0 to VCC
±25
mA
±75
mA
150
°C
Continuous current through VCC or GND
Tstg
(1)
(2)
Storage temperature range
–65
V
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. 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.
7.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins (1)
2000
Charged device model (CDM), per JEDEC specification JESD22-C101,
all pins (2)
1000
Machine Model (MM)
200
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted) (1)
SN54AHC574
VCC
Supply voltage
VIH
High-level input voltage
Low-level Input voltage
MAX
MIN
MAX
2
5.5
2
5.5
VCC = 2 V
1.5
VCC = 3 V
2.1
2.1
3.85
3.85
VCC = 5.5 V
VIL
Input voltage
VO
Output voltage
High-level output current
IOL
Low-level output current
Δt/Δv
Input transition rise or fall rate
TA
Operating free-air temperature
(1)
4
V
V
0.5
VCC = 3 V
0.9
0.9
1.65
1.65
0.5
0
5.5
0
5.5
0
VCC
0
V
V
VCC
V
–50
–50
µA
VCC = 3.3 V ± 0.3 V
–4
–4
VCC = 5 V ± 0.5 V
–8
–8
VCC = 2 V
VCC = 2 V
IOH
UNIT
1.5
VCC = 2 V
VCC = 5.5 V
VI
SN74AHC574
MIN
50
50
VCC = 3.3 V ± 0.3 V
4
4
VCC = 5 V ± 0.5 V
8
8
100
100
20
20
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
–55
125
–40
125
mA
µA
mA
ns/V
°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 (SCBA004).
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SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
7.4 Thermal Information
SN74AHC574
THERMAL METRIC (1)
DB
DGV
DW
N
NS
PW
UNIT
20 PINS
RθJA
Junction-to-ambient thermal resistance
97.9
117.2
79.4
53.3
79.2
103.3
RθJC(top)
Junction-to-case (top) thermal resistance
59.6
32.7
45.7
40.0
45.7
37.8
RθJB
Junction-to-board thermal resistance
53.1
58.7
46.9
34.2
46.8
54.3
ψJT
Junction-to-top characterization parameter
21.3
1.15
18.7
26.4
19.3
2.9
ψJB
Junction-to-board characterization parameter
52.7
58.0
46.5
34.1
46.4
53.8
(1)
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).
7.5 Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SN74AHC574
–40°C to 85°C
MIN
MAX
MIN
–40°C to 125°C
TYP
2V
1.9
2
1.9
1.9
1.9
3V
2.9
3
2.9
2.9
2.9
4.5 V
4.4
4.5
4.4
4.4
4.4
IOH = –4 mA
3V
2.58
2.48
2.48
2.48
IOH = –8 mA
4.5 V
3.94
3.8
3.8
VOH
MAX
–40°C to 85°C
MIN
IOH = –50 µA
MAX
MIN
UNIT
MAX
V
3.8
2V
0.1
0.1
0.1
0.1
3V
0.1
0.1
0.1
0.1
4.5 V
0.1
0.1
0.1
0.1
3V
0.36
0.5
0.44
0.44
IOH = 8 mA
4.5 V
0.36
0.5
0.44
0.44
II
VI = 5.5 V or GND
0 V to
5.5 V
±0.1
(1)
±1
±1
µA
IOZ (2)
VO = VCC or GND
VI (OE) = VIL or VIH
5.5 V
±0.25
±2.5
±2.5
±2.5
µA
4
40
40
40
µA
10
10
pF
IOL = 50 µA
VOL
IOH = 4 mA
(1)
(2)
SN54AHC574
TA = 25°C
VCC
ICC
VI = VCC or GND,
Ci
VI = VCC or GND
IO = 0
5.5 V
5V
3
CO
VO = VCC or GND
5V
3
±1
10
V
pF
On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
For input and output pins, IOZ includes the input leakage current.
7.6 Timing Requirements, VCC = 3.3 V ± 0.3 V
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
TA = 25°C
PARAMETER
MIN
tw
Pulse duration, CLK high or low
tsu
th
MAX
SN54AHC574
–40°C to 85°C
MIN
MAX
SN74AHC574
–40°C to 85°C
MIN
MAX
–40°C to 125°C
MIN
UNIT
MAX
5
5
5
5.5
ns
Setup time, data before CLK↑
3.5
3.5
3.5
4
ns
Hold time, data after CLK↑
1.5
1.5
1.5
2
ns
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7.7 Timing Requirements, VCC = 5 V ± 0.5 V
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
SN54AHC574
TA = 25°C
PARAMETER
MIN
SN74AHC574
–40°C to 85°C
MAX
MIN
–40°C to 85°C
MAX
MIN
–40°C to 125°C
MAX
MIN
UNIT
MAX
tw
Pulse duration, CLK high or low
5
5
5
5.5
ns
tsu
Setup time, data before CLK↑
3
3
3
3.5
ns
th
Hold time, data after CLK↑
1.5
1.5
1.5
2
ns
7.8 Switching Characteristics, VCC = 3.3 V ± 0.3 V
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
fMAX
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
(1)
(2)
6
–40°C to 85°C
CL = 15 pF
80 (1)
125 (1)
65 (1)
65
65
CL = 50 pF
50
75
45
45
45
CL = 15 pF
OE
Q
CL = 15 pF
OE
Q
CL = 15 pF
CLK
Q
CL = 50 pF
OE
Q
CL = 50 pF
OE
Q
CL = 50 pF
CL = 50 pF
MIN
MAX
MIN
MAX
–40°C to 125°C
TYP
Q
MAX
SN74AHC574
–40°C to 85°C
MIN
CLK
tsk(o)
SN54AHC574
TA = 25°C
LOAD
CAPACITANCE
MIN
MHz
8.5 (1)
13.2 (1)
1 (1)
15.5 (1)
1
15.5
1
17
8.5 (1)
13.2 (1)
1 (1)
15.5 (1)
1
15.5
1
17
8.2 (1)
12.8 (1)
1 (1)
15 (1)
1
15
1
16
8.2 (1)
12.8 (1)
1 (1)
15 (1)
1
15
1
16
8.5 (1)
13 (1)
1 (1)
15 (1)
1
15
1
16
(1)
(1)
(1)
(1)
1
15
1
16
8.5
13
1
15
11
16.7
1
19
1
19
1
20.5
11
16.7
1
19
1
19
1
20.5
10.7
16.3
1
18.5
1
18.5
1
19.5
10.7
16.3
1
18.5
1
18.5
1
19.5
11
15
1
17
1
17
1
18
11
15
1
17
1
17
1
18
1.5 (2)
UNIT
MAX
1.5
ns
ns
ns
ns
ns
ns
ns
On products compliant to MIL-PRF-38535, this parameter is not production tested.
On products compliant to MIL-PRF-38535, this parameter does not apply.
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SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
7.9 Switching Characteristics, VCC = 5 V ± 0.5 V
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
fMAX
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
(1)
(2)
–40°C to 85°C
CL = 15 pF
130 (1)
180 (1)
110 (1)
110
110
CL = 50 pF
85
115
75
75
75
CL = 15 pF
OE
Q
CL = 15 pF
OE
Q
CL = 15 pF
CLK
Q
CL = 50 pF
OE
Q
CL = 50 pF
OE
Q
CL = 50 pF
CL = 50 pF
MIN
MAX
MIN
–40°C to 125°C
TYP
Q
MAX
SN74AHC574
–40°C to 85°C
MIN
CLK
tsk(o)
SN54AHC574
TA = 25°C
LOAD
CAPACITANCE
MAX
MIN
UNIT
MAX
MHz
5.6 (1)
8.6 (1)
1 (1)
10 (1)
1
10
1
11
5.6 (1)
8.6 (1)
1 (1)
10 (1)
1
10
1
11
5.9 (1)
9 (1)
1 (1)
10.5 (1)
1
10.5
1
11.5
5.9 (1)
9 (1)
1 (1)
10.5 (1)
1
10.5
1
11.5
5.5 (1)
9 (1)
1 (1)
10.5 (1)
1
10.5
1
11.5
5.5 (1)
9 (1)
1 (1)
10.5 (1)
1
10.5
1
11.5
7.1
10.6
1
12
1
12
1
13
7.1
10.6
1
12
1
12
1
13
7.4
11
1
12.5
1
12.5
1
13.5
7.4
11
1
12.5
1
12.5
1
13.5
7.1
10.1
1
11.5
1
11.5
1
12.5
7.1
10.1
1
11.5
1
11.5
1
12.5
1 (2)
1
ns
ns
ns
ns
ns
ns
1
ns
On products compliant to MIL-PRF-38535, this parameter is not production tested.
On products compliant to MIL-PRF-38535, this parameter does not apply.
7.10 Noise Characteristics
VCC = 5 V, CL = 50 pF, TA = 25°C (1)
SN74AHC574
PARAMETER
MIN
UNIT
MAX
VOL(P)
Quiet output, maximum dynamic VOL
0.8
V
VOL(V)
Quiet output, minimum dynamic VOL
–0.8
V
VOH(V)
Quiet output, minimum dynamic VOH
4.2
VIH(D)
High-level dynamic input voltage
3.5
VIL(D)
Low-level dynamic input voltage
(1)
V
V
1.5
V
Characteristics are for surface-mount packages only.
7.11 Operating Characteristics
VCC = 5 V, TA = 25°C
PARAMETER
Cpd
Power dissipation capacitance
TEST CONDITIONS
No load,
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f = 1 MHz
TYP
UNIT
28
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pF
7
SN54AHC574, SN74AHC574
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
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7.12 Typical Characteristics
7
8
7
6
6
TPD (ns)
TPD (ns)
5
4
5
4
3
3
2
2
1
TPD in ns
1
-100
0
50
Temperature (qC)
100
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150
0
1
2
D001
Figure 1. TPD vs Temperature
8
TPD in ns
0
-50
3
VCC
4
5
6
D001
Figure 2. TPD vs VCC at 25°C
Copyright © 1995–2014, Texas Instruments Incorporated
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SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
8 Parameter Measurement Information
From Output
Under Test
Test
Point
From Output
Under Test
RL = 1 kΩ
S1
VCC
Open
TEST
GND
CL
(see Note A)
CL
(see Note A)
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open Drain
Open
VCC
GND
VCC
LOAD CIRCUIT FOR
3-STATE AND OPEN-DRAIN OUTPUTS
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
VCC
50% VCC
Timing Input
tw
tsu
VCC
Input
50% VCC
50% VCC
0V
th
VCC
50% VCC
Data Input
50% VCC
0V
0V
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VOLTAGE WAVEFORMS
PULSE DURATION
VCC
50% VCC
Input
50% VCC
0V
tPLH
In-Phase
Output
tPHL
50% VCC
tPHL
Out-of-Phase
Output
VOH
50% VCC
VOL
Output
Waveform 1
S1 at VCC
(see Note B)
VOH
50% VCC
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
50% VCC
50% VCC
0V
tPLZ
tPZL
≈VCC
50% VCC
VOL + 0.3 V
VOL
tPHZ
tPZH
tPLH
50% VCC
VCC
Output
Control
Output
Waveform 2
S1 at GND
(see Note B)
50% VCC
VOH – 0.3 V
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig 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. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. All parameters and waveforms are not applicable to all devices.
Figure 3. Load Circuit and Voltage Waveforms
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9
SN54AHC574, SN74AHC574
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
www.ti.com
9 Detailed Description
9.1 Overview
The SNx4AHC574 devices are octal edge-triggered D-type flip-flops that feature 3-state outputs designed
specifically for driving highly capacitive or relatively low-impedance loads. These devices are particularly suitable
for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels of the data (D) inputs.
The states of the Q outputs are not predictable until the first valid clock.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or
low) 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 the increased drive provide the capability to drive bus lines without
interface or pull-up components.
9.2 Functional Block Diagram
OE
CLK
C1
1Q
1D
1D
To Seven Other Channels
9.3 Feature Description
•
•
5.5-V tolerant input allows for 5 V to 3.3 V voltage translation
Slow edges reduce output ringing
9.4 Device Functional Modes
Table 1. Function Table
(Each Flip-Flop)
INPUTS
10
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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Copyright © 1995–2014, Texas Instruments Incorporated
Product Folder Links: SN54AHC574 SN74AHC574
SN54AHC574, SN74AHC574
www.ti.com
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
10 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
10.1 Application Information
SN74AHC574 is a low-drive CMOS device that can be used for a multitude of bus interface type applications
where output ringing is a concern. The low drive and slow edge rates will minimize overshoot and undershoot on
the outputs. The inputs can accept voltages to 5.5 V at any valid VCC making it Ideal for down translation
10.2 Typical Application
5-V regulated
3.3-V or 5-V regulated
OE
VCC
CLK
1D
1Q
µC or
System Logic
8D
8Q
µC
System Logic
LEDs
GND
Figure 4. Typical Application Schematic
10.2.1 Design Requirements
This device uses CMOS technology and has balanced output drive. Care should be taken to avoid bus
contention because it can drive currents that would exceed maximum limits. The high drive will also create fast
edges into light loads, so routing and load conditions should be considered to prevent ringing.
10.2.2 Detailed Design Procedure
1. Recommended Input Conditions
– For rise time and fall time specifications, see Δt/ΔV in the Recommended Operating Conditions table.
– For specified High and low levels, see VIH and VIL in the Recommended Operating Conditions table.
2. Recommend Output Conditions
– Load currents should not exceed 25 mA per output and 75 mA total for the part.
– Outputs should not be pulled above VCC.
Copyright © 1995–2014, Texas Instruments Incorporated
Product Folder Links: SN54AHC574 SN74AHC574
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11
SN54AHC574, SN74AHC574
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
www.ti.com
Typical Application (continued)
10.2.3 Application Curves
Figure 5. Switching Charactersitics Comparison
11 Power Supply Recommendations
The power supply can be any voltage between the MIN and MAX supply voltage rating located in the
Recommended Operating Conditions table.
Each VCC pin should have a good bypass capacitor to prevent power disturbance. For devices with a single
supply, 0.1 μF is recommended. If there are multiple VCC pins, 0.01 μF or 0.022 μF is recommended for each
power pin. It is acceptable to parallel multiple bypass caps to reject different frequencies of noise. A 0.1 μF and
1 μF are commonly used in parallel. The bypass capacitor should be installed as close to the power pin as
possible for best results.
12
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Copyright © 1995–2014, Texas Instruments Incorporated
Product Folder Links: SN54AHC574 SN74AHC574
SN54AHC574, SN74AHC574
www.ti.com
SCLS244J – OCTOBER 1995 – REVISED DECEMBER 2014
12 Layout
12.1 Layout Guidelines
When using multiple bit logic devices, inputs should not float. In many cases, functions or parts of functions of
digital logic devices are unused. Some examples are when only two inputs of a triple-input AND gate are used,
or when only 3 of the 4-buffer gates are used. Such input pins should not be left unconnected because the
undefined voltages at the outside connections result in undefined operational states.
Specified in Figure 6 are rules that must be observed under all circumstances. All unused inputs of digital logic
devices must be connected to a high or low bias to prevent them from floating. The logic level that should be
applied to any particular unused input depends on the function of the device. Generally they will be tied to GND
or VCC, whichever makes more sense or is more convenient. It is acceptable to float outputs unless the part is a
transceiver. If the transceiver has an output enable pin, it will disable the outputs section of the part when
asserted. This will not disable the input section of the I/Os so they also cannot float when disabled.
12.2 Layout Example
Vcc
Input
Unused Input
Output
Unused Input
Output
Input
Figure 6. Layout Diagram
13 Device and Documentation Support
13.1 Related Links
The table below lists quick access links. Categories include technical documents, support and community
resources, tools and software, and quick access to sample or buy.
13.2 Trademarks
All trademarks are the property of their respective owners.
13.3 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
13.4 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
14 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.
Copyright © 1995–2014, Texas Instruments Incorporated
Product Folder Links: SN54AHC574 SN74AHC574
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13
PACKAGE OPTION ADDENDUM
www.ti.com
24-Aug-2018
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
5962-9685401Q2A
ACTIVE
LCCC
FK
20
1
TBD
POST-PLATE
N / A for Pkg Type
-55 to 125
59629685401Q2A
SNJ54AHC
574FK
5962-9685401QRA
ACTIVE
CDIP
J
20
1
TBD
A42
N / A for Pkg Type
-55 to 125
5962-9685401QR
A
SNJ54AHC574J
5962-9685401QSA
ACTIVE
CFP
W
20
1
TBD
A42
N / A for Pkg Type
-55 to 125
5962-9685401QS
A
SNJ54AHC574W
SN74AHC574DBR
ACTIVE
SSOP
DB
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
HA574
SN74AHC574DGVR
ACTIVE
TVSOP
DGV
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
HA574
SN74AHC574DW
ACTIVE
SOIC
DW
20
25
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC574
SN74AHC574DWG4
ACTIVE
SOIC
DW
20
25
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC574
SN74AHC574DWR
ACTIVE
SOIC
DW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC574
SN74AHC574DWRE4
ACTIVE
SOIC
DW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC574
SN74AHC574N
ACTIVE
PDIP
N
20
20
Pb-Free
(RoHS)
CU NIPDAU
N / A for Pkg Type
-40 to 125
SN74AHC574N
SN74AHC574NSR
ACTIVE
SO
NS
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
AHC574
SN74AHC574PW
ACTIVE
TSSOP
PW
20
70
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
HA574
SN74AHC574PWR
ACTIVE
TSSOP
PW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
HA574
SN74AHC574PWRE4
ACTIVE
TSSOP
PW
20
2000
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-1-260C-UNLIM
-40 to 125
HA574
SNJ54AHC574FK
ACTIVE
LCCC
FK
20
1
TBD
POST-PLATE
N / A for Pkg Type
-55 to 125
59629685401Q2A
SNJ54AHC
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
Orderable Device
24-Aug-2018
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
574FK
SNJ54AHC574J
ACTIVE
CDIP
J
20
1
TBD
A42
N / A for Pkg Type
-55 to 125
5962-9685401QR
A
SNJ54AHC574J
SNJ54AHC574W
ACTIVE
CFP
W
20
1
TBD
A42
N / A for Pkg Type
-55 to 125
5962-9685401QS
A
SNJ54AHC574W
(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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