74LVC125ADR2G Equivalent & Substitute Parts

Part Overview

The 74LVC125ADR2G is a non-inverting buffer IC manufactured by onsemi, featuring 4 elements with 1 bit per element and 3-state output capability. This logic component operates across a supply voltage range of 1.2V to 3.6V and is housed in a 14-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The device delivers 24mA output current for both high and low states, suitable for general-purpose logic buffering applications in low-voltage systems.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	4
Number of Bits per Element	1
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	1.2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LVC125ADR2G is determined by strict alignment of the following critical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 4
Number of Bits per Element: 1
Output Type: 3-State
Output Current: 24mA (both high and low)
Package / Case: 14-SOIC with 0.154" (3.90mm) width
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into three categories based on their relationship to the main part: direct manufacturer alternatives from onsemi and Texas Instruments, cross-manufacturer parametric equivalents from Nexperia and NXP, and automotive-qualified variants. All listed substitutes maintain identical functional specifications and package dimensions, ensuring direct pin-for-pin compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Voltage Supply	Temp Range	Package	Output Current
74LVC125ADR2G	onsemi	74LVC	Obsolete	1.2V ~ 3.6V	-40°C ~ 125°C	14-SOIC	24mA / 24mA
MC74LCX125DR2G	onsemi	74LCX	Active	2V ~ 3.6V	-40°C ~ 85°C	14-SOIC	24mA / 24mA
SN74LVC125ADT	Texas Instruments	74LVC	Active	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC	24mA / 24mA
SN74LVC125ANSR	Texas Instruments	74LVC	Active	1.65V ~ 3.6V	-40°C ~ 125°C	14-SO (5.30mm)	24mA / 24mA
74LVC125AD,118	Nexperia USA Inc.	74LVC	Active	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO	24mA / 24mA
74LVC125AD-Q100J	Nexperia USA Inc.	74LVC	Active	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO	24mA / 24mA
74LVC125AD/AUJ	NXP USA Inc.	74LVC	Active	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO	24mA / 24mA
74LVC126AD,118	Nexperia USA Inc.	74LVC	Active	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO	24mA / 24mA
74LVC126AD-Q100J	Nexperia USA Inc.	74LVC	Active	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO	24mA / 24mA
74LVC126AD/AUJ	NXP USA Inc.	74LVC	Active	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO	24mA / 24mA

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

For applications requiring the widest supply voltage range and full temperature operating window, select from the 74LVC series parts (74LVC125AD,118, 74LVC125AD/AUJ, 74LVC126AD,118, 74LVC126AD/AUJ) which support 1.2V to 3.6V operation across -40°C to 125°C.

For automotive applications requiring AEC-Q100 qualification, the 74LVC125AD-Q100J and 74LVC126AD-Q100J variants from Nexperia are available with active product status.

The MC74LCX125DR2G from onsemi operates within a narrower voltage range (2V to 3.6V) and reduced temperature range (-40°C to 85°C), making it suitable only for applications that do not require the full 1.2V minimum supply voltage or extended high-temperature operation.

The SN74LVC125ANSR from Texas Instruments uses a wider 14-SO package (5.30mm width) compared to the standard 14-SOIC (3.90mm width), requiring PCB layout verification before selection.

Frequently Asked Questions (FAQ)

Q: Can the MC74LCX125DR2G directly replace the 74LVC125ADR2G?

A: The MC74LCX125DR2G is functionally equivalent but operates within a narrower voltage range (2V to 3.6V minimum versus 1.2V) and reduced temperature range (-40°C to 85°C versus -40°C to 125°C). Direct substitution is only valid if your application operates within these narrower specifications.

Q: What is the difference between 74LVC125 and 74LVC126 series parts?

A: Both series provide identical electrical specifications for the 74LVC125ADR2G substitution criteria. The 74LVC126 designation indicates a different base product number but maintains the same functional characteristics, output current, and package configuration required for compatibility.

Q: Are the SN74LVC125ANSR and SN74LVC125ADT interchangeable?

A: Both parts are from Texas Instruments with identical electrical specifications. However, the SN74LVC125ANSR uses a 14-SO package with 5.30mm width, while the SN74LVC125ADT uses a 14-SOIC package with 3.90mm width. PCB footprint compatibility must be verified before substitution.

Q: What does the -Q100J suffix indicate on Nexperia parts?

A: The -Q100J suffix denotes AEC-Q100 automotive qualification, indicating the part meets automotive industry reliability and testing standards. These variants are suitable for automotive applications requiring formal qualification documentation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) rating, ensuring compatibility with standard manufacturing processes and storage requirements.

Q: Can I use the 74LVC125AD/AUJ from NXP as a direct replacement?

A: Yes, the 74LVC125AD/AUJ maintains identical electrical specifications and 14-SO package configuration. It supports the full 1.2V to 3.6V supply range and -40°C to 125°C operating temperature, providing direct functional compatibility.

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