SN74HC125, SN54HC125
SN74HC125,
SN54HC125
SCLS104F – AUGUST
1984 – REVISED
APRIL 2021
SCLS104F – AUGUST 1984 – REVISED APRIL 2021
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SNx4HC125 Quadruple Buffers with 3-State Outputs
1 Features
3 Description
•
•
•
This device contains four independent buffers with
3-state outputs. Each gate performs the Boolean
function Y = A in positive logic.
•
•
Buffered inputs
Wide operating voltage range: 2 V to 6 V
Wide operating temperature range:
–40°C to +85°C
Supports fanout up to 10 LSTTL loads
Significant power reduction compared to LSTTL
logic ICs
2 Applications
•
Enable digital signals
Device Information(1)
PART NUMBER
SOIC (14)
8.70 mm × 3.90 mm
SN74HC125DB
SSOP (14)
6.50 mm × 5.30 mm
SN74HC125N
PDIP (14)
19.30 mm × 6.40 mm
SN74HC125NS
SO (14)
10.20 mm × 5.30 mm
SN74HC125PW
TSSOP (14)
5.00 mm × 4.40 mm
SN54HC125J
CDIP (14)
21.30 mm × 7.60 mm
SN54HC125FK
LCCC (20)
8.90 mm × 8.90 mm
For all available packages, see the orderable addendum at
the end of the data sheet.
1
14
VCC
2
13
4OE
3
4
12
11
4A
2A
5
10
3OE
2Y
6
7
9
8
1A
1Y
2OE
GND
BODY SIZE (NOM)
SN74HC125D
(1)
1OE
PACKAGE
4Y
3A
3Y
Functional pinout
An©IMPORTANT
NOTICEIncorporated
at the end of this data sheet addresses availability, warranty, changes, use in
safety-critical
applications,
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2021 Texas Instruments
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SCLS104F – AUGUST 1984 – REVISED APRIL 2021
Table of Contents
1 Features............................................................................1
2 Applications..................................................................... 1
3 Description.......................................................................1
4 Revision History.............................................................. 2
5 Pin Configuration and Functions...................................3
Pin Functions.................................................................... 3
6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings........................................ 4
6.2 ESD Ratings............................................................... 4
6.3 Recommended Operating Conditions.........................4
6.4 Thermal Information....................................................5
6.5 Electrical Characteristics - 74..................................... 5
6.6 Electrical Characteristics - 54..................................... 6
6.7 Switching Characteristics - 74.....................................6
6.8 Switching Characteristics - 54.....................................7
6.9 Operating Characteristics........................................... 7
6.10 Typical Characteristics.............................................. 7
7 Parameter Measurement Information............................ 9
8 Detailed Description......................................................10
8.1 Overview................................................................... 10
8.2 Functional Block Diagram......................................... 10
8.3 Feature Description...................................................10
8.4 Device Functional Modes..........................................11
9 Application and Implementation.................................. 12
9.1 Application Information............................................. 12
9.2 Typical Application.................................................... 12
10 Power Supply Recommendations..............................14
11 Layout........................................................................... 14
11.1 Layout Guidelines................................................... 14
11.2 Layout Example...................................................... 14
12 Device and Documentation Support..........................15
12.1 Documentation Support.......................................... 15
12.2 Related Links.......................................................... 15
12.3 Support Resources................................................. 15
12.4 Trademarks............................................................. 15
12.5 Electrostatic Discharge Caution..............................15
12.6 Glossary..................................................................15
13 Mechanical, Packaging, and Orderable
Information.................................................................... 15
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision E (December 2015) to Revision F (April 2021)
Page
• Updated the numbering format for tables, figures, and cross-references throughout the document..................1
• Updated to new data sheet standards................................................................................................................ 1
• Increased D (86 to 133.6), DB (96 to 108.0), NS (76 to 122.6), and PW (113 to 151.7); decreased N (80 to
63.0) °C/W.......................................................................................................................................................... 5
2
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5 Pin Configuration and Functions
1A 1OE NC VCC 4OE
1
14
2
13
4OE
3
4
12
11
4A
1Y
4
20 19
18
4A
4Y
NC
5
17
NC
2A
5
10
3OE
4Y
2Y
6
7
9
8
1OE
1A
1Y
2OE
GND
VCC
3
2
1
2OE
6
16
3A
NC
7
15
3Y
2A
8
14
9 10 11 12 13
Figure 5-1. D, DB, N, NS, PW, or J Package
14-Pin SOIC, SSOP, PDIP, SO, TSSOP, or CDIP
Top View
NC
3OE
2Y GND NC 3Y 3A
Figure 5-2. FK Package
20-Pin LCCC
Top View
Pin Functions
PIN
NAME
D, DB, N,
NS, PW, or
J
FK
I/O
DESCRIPTION
1 OE
1
2
Input
Channel 1, Output Enable, Active Low
1A
2
3
Input
Channel 1, Input A
1Y
3
4
Output
2 OE
4
6
Input
Channel 2, Output Enable, Active Low
2A
5
8
Input
Channel 2, Input A
2Y
6
9
Output
GND
7
10
—
3Y
8
12
Output
3A
9
13
Input
Channel 3, Input A
3 OE
10
14
Input
Channel 3, Output Enable, Active Low
4Y
11
16
Output
4A
12
18
Input
Channel 1, Output Y
Channel 2, Output Y
Ground
Channel 3, Output Y
Channel 4, Output Y
Channel 4, Input A
4 OE
13
19
Input
VCC
14
20
—
Positive Supply
1, 5, 7, 11, 15,
17
—
Not internally connected
NC
Channel 4, Output Enable, Active Low
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6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
VCC
Supply voltage
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
Continuous output current
VO = 0 to VCC
IO
Continuous current through VCC or GND
TJ
Junction temperature(3)
Tstg
Storage temperature
(1)
(2)
(3)
–65
±35
mA
±70
mA
150
°C
150
°C
Stresses beyond those listed under Absolute Maximum Rating 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 Condition. 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.
Guaranteed by design.
6.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human-body model (HBM), per ANSI/ESDA/
JEDEC JS-001(1)
±2000
Charged-device model (CDM), per JEDEC
specification JESD22-C101(2)
±500
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.
6.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
VCC
Supply voltage
VIH
High-level input voltage
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
MIN
NOM
MAX
2
5
6
Low-level input voltage
V
4.2
0.5
VCC = 4.5 V
1.35
VCC = 6 V
V
1.8
VI
Input voltage
0
VCC
V
VO
Output voltage
0
VCC
V
VCC = 2 V
tt
TA
4
V
1.5
3.15
VCC = 2 V
VIL
UNIT
Input transition time
1000
VCC = 4.5 V
500
VCC = 6 V
400
Operating free-air temperature
–55
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125
ns
°C
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6.4 Thermal Information
SN74HC125
THERMAL
METRIC(1)
D (SOIC)
DB (SSOP)
N (PDIP)
NS (SO)
PW (TSSOP)
14 PINS
14 PINS
14 PINS
14 PINS
14 PINS
UNIT
133.6
108.0
63.0
122.6
151.7
°C/W
89
57.8
50.7
81.8
79.4
°C/W
RθJA
Junction-to-ambient thermal
resistance
RθJC(top)
Junction-to-case (top) thermal
resistance
RθJB
Junction-to-board thermal
resistance
89.5
58.3
42.7
83.8
94.7
°C/W
ΨJT
Junction-to-top characterization
parameter
45.5
18.0
30.3
45.4
25.2
°C/W
ΨJB
Junction-to-board
characterization parameter
89.1
57.6
42.5
83.4
94.1
°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.
6.5 Electrical Characteristics - 74
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
Operating free-air temperature (TA)
PARAMETER
VOH
VOL
High-level
output voltage
TEST CONDITIONS
VI = VIH
or VIL
Low-level output VI = VIH
voltage
or VIL
IOH = –20 µA
VCC
25°C
-40°C to 85°C
MIN
TYP
2V
1.9
1.998
1.9
4.5 V
4.4
4.499
4.4
6V
MAX
MIN
5.9
5.999
5.9
IOH = –6 mA
4.5 V
3.98
4.3
3.84
IOH = –7.8 mA
6V
5.48
IOL = 20 µA
5.8
TYP
UNIT
MAX
V
5.34
2V
0.002
0.1
0.1
4.5 V
0.001
0.1
0.1
6V
0.001
0.1
0.1
V
IOL = 6 mA
4.5 V
0.17
0.26
0.33
IOL = 7.8 mA
6V
0.15
0.26
0.33
±0.1
±1
µA
±0.5
±5
µA
8
80
µA
10
10
pF
II
Input leakage
current
VI = VCC or 0
6V
IOZ
Three-state
leakage current
VO = VCC
or 0
6V
ICC
Supply current
VI = VCC
or 0
Ci
Input
capacitance
IO = 0
±0.01
6V
2 V to 6 V
3
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6.6 Electrical Characteristics - 54
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
Operating free-air temperature (TA)
PARAMETER
TEST CONDITIONS
IOH = –20
µA
VOH
High-level
output voltage
VI = VIH or
IOH = –6
VIL
mA
IOL = 20
µA
Low-level
output voltage
VI = VIH or
VIL
25°C
–40°C to 85°C
MAX
MIN
TYP
–55°C to 125°C
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
3.84
3.7
6V
5.48
5.8
5.34
5.2
TYP
UNIT
MAX
V
IOH = –7.8
mA
VOL
VCC
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
0.33
0.4
IOL = 7.8
mA
0.15
0.26
0.33
0.4
±0.1
±1
±1
µA
±0.5
±5
±10
µA
8
80
160
µA
10
10
10
pF
6V
II
Input leakage
current
VI = VCC or 0
6V
IOZ
Three-state
leakage
current
VO = VCC
or 0
6V
ICC
Supply current
VI = VCC or
IO = 0
0
6V
Ci
Input
capacitance
±0.01
2 V to
6V
3
V
6.7 Switching Characteristics - 74
over operating free-air temperature range (unless otherwise noted)
PARAMETER
FROM
TO
TEST
CONDITIONS
Operating free-air temperature (TA)
VCC
25°C
MIN
CL = 50 pF
tpd
Propagation delay
A
Y
CL = 150 pF
CL = 50 pF
ten
Enable delay
OE
Y
CL = 150 pF
tdis
6
Disable delay
OE
Y
CL = 50 pF
–40°C to 85°C
MIN
TYP
UNIT
TYP
MAX
MAX
2V
47
120
180
4.5 V
14
24
36
6V
11
20
31
2V
67
150
225
4.5 V
19
30
45
6V
15
25
39
2V
57
120
180
4.5 V
16
24
36
6V
12
20
31
2V
100
135
202
4.5 V
20
27
40
6V
17
23
36
2V
35
120
180
4.5 V
17
24
36
6V
15
20
31
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ns
ns
ns
ns
ns
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over operating free-air temperature range (unless otherwise noted)
PARAMETER
FROM
TO
TEST
CONDITIONS
Operating free-air temperature (TA)
VCC
25°C
MIN
tt
Transition-time
Y
CL = 150 pF
MIN
TYP
UNIT
TYP
MAX
28
60
90
4.5 V
8
12
18
6V
6
10
15
2V
45
210
315
4.5 V
17
42
63
6V
13
36
53
2V
CL = 50 pF
–40°C to 85°C
MAX
ns
ns
6.8 Switching Characteristics - 54
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
PARAMETER
FROM
TO
CL = 50 pF
tpd
Propagation delay
A
Y
CL = 150 pF
CL = 50 pF
ten
Enable delay
OE
Y
CL = 150 pF
tdis
Disable delay
OE
Y
CL = 50 pF
CL = 50 pF
tt
Transition-time
Operating free-air temperature (TA)
TEST
CONDITIONS
Y
CL = 150 pF
VCC
25°C
–40°C to 85°C
–55°C to 125°C
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
2V
47
120
180
150
4.5 V
14
24
36
30
6V
11
20
31
26
2V
67
150
225
188
4.5 V
19
30
45
38
6V
15
25
39
33
2V
57
120
180
150
4.5 V
16
24
36
30
6V
12
20
31
26
2V
100
135
202
169
4.5 V
20
27
40
36
6V
17
23
36
30
2V
35
120
180
150
4.5 V
17
24
36
30
6V
15
20
31
26
2V
28
60
90
75
4.5 V
8
12
18
15
6V
6
10
15
13
2V
45
210
315
265
4.5 V
17
42
63
53
6V
13
36
53
45
UNIT
ns
ns
ns
ns
ns
ns
ns
6.9 Operating Characteristics
over operating free-air temperature range; typical values measured at TA = 25°C (unless otherwise noted).
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance
No load
per gate
VCC
2 V to 6 V
MIN
TYP
45
MAX UNIT
pF
6.10 Typical Characteristics
TA = 25°C
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7
0.3
6
0.25
VOL Output Low Voltage (V)
VOH Output High Voltage (V)
SCLS104F – AUGUST 1984 – REVISED APRIL 2021
5
4
3
2
2-V
4.5-V
6-V
1
0
0.2
0.15
0.1
0.05
0
0
1
2
3
4
IOH Output High Current (mA)
5
6
Figure 6-1. Typical output voltage in the high state
(VOH)
8
2-V
4.5-V
6-V
0
1
2
3
4
IOL Output Low Current (mA)
5
6
Figure 6-2. Typical output voltage in the low state
(VOL)
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7 Parameter Measurement Information
•
•
Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators
having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tt < 6 ns.
The outputs are measured one at a time, with one input transition per measurement.
VCC
Test
Point
90%
Input
10%
10%
S1
tr(1)
RL
From Output
Under Test
CL(1)
90%
S2
0V
tf(1)
VOH
90%
Output
10%
A.
VCC
90%
10%
tr(1)
CL= 50 pF and includes probe and jig capacitance.
A.
Figure 7-1. Load Circuit
tf(1)
VOL
tt is the greater of tr and tf.
Figure 7-2. Voltage Waveforms Transition Times
VCC
Output
Control
50%
50%
0V
tPZL
Output
Waveform 1
S1 at VLOAD(1)
(3)
§ 9CC
50%
10%
VOL
tPZH(3)
Output
Waveform 2
S1 at GND(2)
A.
tPLZ
(4)
tPHZ(4)
90%
VOH
50%
§0V
The maximum between tPLH and tPHL is used for tpd.
Figure 7-3. Voltage Waveforms Propagation Delays
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8 Detailed Description
8.1 Overview
This device contains four independent buffers with 3-state outputs. Each gate performs the Boolean function Y =
A in positive logic.
8.2 Functional Block Diagram
xOE
xA
xY
8.3 Feature Description
8.3.1 Balanced CMOS 3-State Outputs
A balanced output allows the device to sink and source similar currents. The drive capability of this device
may create fast edges into light loads so routing and load conditions should be considered to prevent ringing.
Additionally, the outputs of this device are capable of driving larger currents than the device can sustain without
being damaged. It is important for the output power of the device to be limited to avoid damage due to
over-current. The electrical and thermal limits defined in the Absolute Maximum Ratings must be followed at all
times.
The SN74HC125 can drive a load with a total capacitance less than or equal to the maximum load listed in the
Electrical Characteristics - 74 connected to a high-impedance CMOS input while still meeting all of the datasheet
specifications. Larger capacitive loads can be applied, however it is not recommended to exceed the provided
load value. If larger capacitive loads are required, it is recommended to add a series resistor between the output
and the capacitor to limit output current to the values given in the Absolute Maximum Ratings.
3-State outputs can be placed into a high-impedance state. In this state, the output will neither source nor sink
current, and leakage current is defined by the IOZ specification in the Electrical Characteristics - 74. A pull-up
or pull-down resistor can be used to ensure that the output remains HIGH or LOW, respectively, during the
high-impedance state.
8.3.2 Standard CMOS Inputs
Standard CMOS inputs are high impedance and are typically modeled as a resistor from the input to ground
in parallel with the input capacitance given in the Electrical Characteristics - 74. The worst case resistance is
calculated with the maximum input voltage, given in the Absolute Maximum Ratings, and the maximum input
leakage current, given in the Electrical Characteristics - 74, using ohm's law (R = V ÷ I).
Signals applied to the inputs need to have fast edge rates, as defined by the input transition time in the
Recommended Operating Conditions to avoid excessive current consumption and oscillations. If a slow or noisy
input signal is required, a device with a Schmitt-trigger input should be used to condition the input signal prior to
the standard CMOS input.
10
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8.3.3 Clamp Diode Structure
The inputs and outputs to this device have both positive and negative clamping diodes as depicted in Figure 8-1.
CAUTION
Voltages beyond the values specified in the Absolute Maximum Ratings table can cause damage to
the device. The recommended input and output voltage ratings may be exceeded if the input and
output clamp-current ratings are observed.
Device
VCC
+IIK
+IOK
Logic
Input
-IIK
Output
-IOK
GND
Figure 8-1. Electrical Placement of Clamping Diodes for Each Input and Output
8.4 Device Functional Modes
Table 8-1. Function Table
INPUTS
OUTPUT
OE
A
Y
L
H
H
L
L
L
H
X
Z
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9 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, as well as validating and testing their design
implementation to confirm system functionality.
9.1 Application Information
In this application, a 3-state buffer is used to enable or disable a data connection as shown in Figure 9-1. It
is common to see all four channels of a device used together for controlling a 4-bit data bus, however each
channel of the device can be used independently. Unused channels should have the inputs terminated at ground
or VCC and the output left unconnected.
When the output of the device is active, the data signal will be replicated at the output. When the output of
the device is disabled, the output will be in a high-impedance state, and the output voltage will be determined
by the circuit connected to the output pin. This circuit is most commonly used when a bus must be completely
disabled. One example of this situation is when the circuitry connected to the output is to be powered off for an
extended period of time to save system power, and the inputs to that circuitry cannot have a voltage present due
to protective clamp diodes.
9.2 Typical Application
System
Controller
OE
Data
A
Y
Output
Figure 9-1. Typical application schematic
9.2.1 Design Requirements
9.2.1.1 Power Considerations
Ensure the desired supply voltage is within the range specified in the Recommended Operating Conditions. The
supply voltage sets the device's electrical characteristics as described in the Electrical Characteristics - 74.
The supply must be capable of sourcing current equal to the total current to be sourced by all outputs of the
SN74HC125 plus the maximum supply current, ICC, listed in the Electrical Characteristics - 74. The logic device
can only source or sink as much current as it is provided at the supply and ground pins, respectively. Be sure not
to exceed the maximum total current through GND or VCC listed in the Absolute Maximum Ratings.
Total power consumption can be calculated using the information provided in CMOS Power Consumption and
Cpd Calculation.
Thermal increase can be calculated using the information provided in Thermal Characteristics of Standard Linear
and Logic (SLL) Packages and Devices.
CAUTION
The maximum junction temperature, TJ(max) listed in the Absolute Maximum Ratings, is an
additional limitation to prevent damage to the device. Do not violate any values listed in the Absolute
Maximum Ratings. These limits are provided to prevent damage to the device.
12
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9.2.1.2 Input Considerations
Unused inputs must be terminated to either VCC or ground. These can be directly terminated if the input is
completely unused, or they can be connected with a pull-up or pull-down resistor if the input is to be used
sometimes, but not always. A pull-up resistor is used for a default state of HIGH, and a pull-down resistor is used
for a default state of LOW. The resistor size is limited by drive current of the controller, leakage current into the
SN74HC125, as specified in the Electrical Characteristics - 74, and the desired input transition rate. A 10-kΩ
resistor value is often used due to these factors.
The SN74HC125 has standard CMOS inputs, so input signal edge rates cannot be slow. Slow input edge
rates can cause oscillations and damaging shoot-through current. The recommended rates are defined in the
Recommended Operating Conditions.
Refer to Section 8.3 for additional information regarding the inputs for this device.
9.2.1.3 Output Considerations
The positive supply voltage is used to produce the output HIGH voltage. Drawing current from the output will
decrease the output voltage as specified by the VOH specification in the Electrical Characteristics - 74. Similarly,
the ground voltage is used to produce the output LOW voltage. Sinking current into the output will increase the
output voltage as specified by the VOL specification in the Electrical Characteristics - 74.
Unused outputs can be left floating. Do not connect outputs directly to VCC or ground.
Refer to Section 8.3 for additional information regarding the outputs for this device.
9.2.2 Detailed Design Procedure
1. Add a decoupling capacitor from VCC to GND. The capacitor needs to be placed physically close to the
device and electrically close to both the VCC and GND pins. An example layout is shown in Section 11.
2. Ensure the capacitive load at the output is ≤ 70 pF. This is not a hard limit, however it will ensure optimal
performance. This can be accomplished by providing short, appropriately sized traces from the SN74HC125
to the receiving device.
3. Ensure the resistive load at the output is larger than (VCC / IO(max)) Ω. This will ensure that the maximum
output current from the Absolute Maximum Ratings is not violated. Most CMOS inputs have a resistive load
measured in megaohms; much larger than the minimum calculated above.
4. Thermal issues are rarely a concern for logic gates, however the power consumption and thermal increase
can be calculated using the steps provided in the application report, CMOS Power Consumption and Cpd
Calculation
9.2.3 Application Curves
OE
Data
Output
Figure 9-2. Typical application timing diagram
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10 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 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, as shown in
Figure 11-1.
11 Layout
11.1 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. 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.
11.2 Layout Example
GND VCC
Recommend GND flood fill for
improved signal isolation, noise
reduction, and thermal dissipation
0.1 F
Avoid 90°
corners for
signal lines
Bypass capacitor
placed close to the
device
1OE
1
14
VCC
1A
2
13
4OE
1Y
3
12
4A
2OE
4
11
4Y
2A
5
10
3OE
2Y
6
9
3A
GND
7
8
3Y
Unused
inputs tied
to VCC
Unused
output left
floating
Figure 11-1. Example layout for the SN74HC125
14
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SCLS104F – AUGUST 1984 – REVISED APRIL 2021
12 Device and Documentation Support
12.1 Documentation Support
12.1.1 Related Documentation
For related documentation see the following:
• HCMOS Design Considerations
• CMOS Power Consumption and CPD Calculation
• Designing with Logic
12.2 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.
12.3 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.
12.4 Trademarks
TI E2E™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
12.5 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.
12.6 Glossary
TI Glossary
This glossary lists and explains terms, acronyms, and definitions.
13 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.
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Product Folder Links: SN74HC125 SN54HC125
15
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)
5962-87721012A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
596287721012A
SNJ54HC
125FK
5962-8772101CA
ACTIVE
CDIP
J
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8772101CA
SNJ54HC125J
Samples
SN54HC125J
ACTIVE
CDIP
J
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
SN54HC125J
Samples
SN74HC125D
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125DBR
ACTIVE
SSOP
DB
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125DE4
ACTIVE
SOIC
D
14
50
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125DR
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU | SN
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125DRG4
ACTIVE
SOIC
D
14
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125DT
ACTIVE
SOIC
D
14
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125N
ACTIVE
PDIP
N
14
25
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74HC125N
Samples
SN74HC125NE4
ACTIVE
PDIP
N
14
25
RoHS & Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74HC125N
Samples
SN74HC125NSR
ACTIVE
SO
NS
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125PWR
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU | SN
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125PWRG4
ACTIVE
TSSOP
PW
14
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SN74HC125PWT
ACTIVE
TSSOP
PW
14
250
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC125
Samples
SNJ54HC125FK
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
596287721012A
SNJ54HC
125FK
SNJ54HC125J
ACTIVE
CDIP
J
14
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
5962-8772101CA
SNJ54HC125J
Addendum-Page 1
Samples
Samples
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
(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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