74LVC126AD,112 Equivalent & Substitute Parts

Part Overview

The 74LVC126AD,112 is a non-inverting buffer logic IC manufactured by Nexperia USA Inc., featuring 4 elements with 1 bit per element and 3-state output capability. This component operates across a supply voltage range of 1.2V to 3.6V and is housed in a 14-SO surface mount package. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC126AD,112
Manufacturer	Nexperia USA Inc.
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)
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LVC126AD,112 is determined by the following critical parameters:

Logic Function: Buffer, Non-Inverting with 4 elements, 1 bit per element
Output Configuration: 3-State output capability
Output Current: 24mA high and low drive capability
Supply Voltage Range: Minimum 1.2V to 3.6V maximum
Operating Temperature: -40°C to 125°C
Package Type: 14-SO or 14-SOIC surface mount variants
Compliance: ROHS3 compliant, MSL 1 rating

All substitute parts listed maintain functional equivalence across these parameters. Variations in packaging width (0.154" vs 0.209") and supplier packaging format (Tube, Cut Tape, Tape & Reel) do not affect electrical compatibility but may impact procurement and assembly workflows.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Output Type	Current (mA)	Supply Voltage	Temp Range	Package	Status
74LVC126AD,112	Nexperia USA Inc.	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.2V ~ 3.6V	-40°C ~ 125°C	14-SO (0.154")	Obsolete
SN74LVC126AD	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC (0.154")	Active
SN74LVC126ADR	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC (0.154")	Active
SN74LVC126ADT	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC (0.154")	Active
SN74LVC126ANS	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SO (0.209")	Active
SN74LVC126ANSR	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SO (0.209")	Active
SN74LVC126AQDRG4Q1	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC (0.154")	Active
SN74LVC126AQDRQ1	Texas Instruments	Buffer, Non-Inverting	4 x 1-bit	3-State	24/24	1.65V ~ 3.6V	-40°C ~ 125°C	14-SOIC (0.154")	Active

Engineering Selection Recommendations

All Texas Instruments SN74LVC126 variants listed are active production parts with full ROHS3 compliance and MSL 1 rating, making them suitable replacements for the obsolete Nexperia 74LVC126AD,112.

For standard industrial applications: SN74LVC126AD, SN74LVC126ADR, or SN74LVC126ADT provide direct electrical equivalence with 14-SOIC (0.154" width) packaging. These parts are available in multiple packaging formats (Tube, Cut Tape, Tape & Reel) to accommodate different procurement and assembly requirements.

For automotive applications: SN74LVC126AQDRG4Q1 and SN74LVC126AQDRQ1 are AEC-Q100 qualified automotive-grade variants with identical electrical specifications and 14-SOIC (0.154" width) packaging.

For legacy board compatibility with wider package footprints: SN74LVC126ANS and SN74LVC126ANSR accommodate 14-SO (0.209" width) package dimensions while maintaining full functional equivalence.

The supply voltage range difference (1.2V minimum for Nexperia versus 1.65V minimum for Texas Instruments) does not impact compatibility in applications operating above 1.65V. Applications requiring operation below 1.65V require design review.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC126 parts from Texas Instruments directly replace the Nexperia 74LVC126AD,112?

A: Yes. All listed Texas Instruments SN74LVC126 variants maintain functional equivalence across logic type, element count, output configuration, current drive, operating temperature, and compliance certifications. Electrical substitution is valid for applications operating at supply voltages of 1.65V or higher.

Q: What is the difference between 14-SOIC (0.154") and 14-SO (0.209") packages?

A: Both are 14-pin surface mount packages with identical pin assignments and electrical function. The difference is physical width: 0.154" (3.90mm) versus 0.209" (5.30mm). Package selection depends on PCB layout and assembly equipment compatibility. Verify footprint dimensions against your design before selection.

Q: Are the automotive-qualified variants (AQDRG4Q1, AQDRQ1) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts meet or exceed industrial-grade specifications and are fully compatible with standard industrial designs. AEC-Q100 qualification provides additional reliability assurance and does not restrict use in non-automotive applications.

Q: What packaging formats are available for procurement?

A: Texas Instruments SN74LVC126 variants are supplied in Tube, Cut Tape (CT) & Digi-Reel, and Tape & Reel (TR) formats. Selection depends on order quantity, assembly automation requirements, and supplier availability. All formats contain identical components with different presentation for handling and feeding.

Q: Is the supply voltage range difference (1.2V vs 1.65V minimum) a concern?

A: The Nexperia part specifies 1.2V minimum; Texas Instruments specifies 1.65V minimum. For applications operating at 1.65V or above, this difference is not a concern. Applications requiring operation below 1.65V must retain the original Nexperia part or conduct design review to increase supply voltage.

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