SN74LVC126ADG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC126ADG4 is a non-inverting buffer IC from Texas Instruments, featuring 4 elements with 1 bit per element and 3-state output capability. This component operates across a supply voltage range of 1.65V to 3.6V and is housed in a 14-SOIC package. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74LVC126ADG4
Manufacturer	Texas Instruments
Series	74LVC
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	1.65V ~ 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)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC126ADG4 is determined by strict adherence to the following parameters:

Critical Matching Parameters:

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: 1.65V ~ 3.6V (minimum requirement)
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)

All substitute parts listed below meet these electrical and mechanical specifications, ensuring functional and physical compatibility with the original SN74LVC126ADG4 design.

Parameter Comparison

Parameter	SN74LVC126ADG4 (Original)	SN74LVC125AD	SN74LVC126AD	74LVC126AD,118	74LVC126AS14-13
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Nexperia USA Inc.	Diodes Incorporated
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	4	4	4	4	4
Number of Bits per Element	1	1	1	1	1
Output Type	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.2V ~ 3.6V	1.65V ~ 3.6V
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)	-40°C ~ 125°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active
Inventory Availability	1136 Pcs	2100 Pcs	7557 Pcs	5426 Pcs	5100 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the SN74LVC126ADG4. Selection should be based on the following factors:

Product Status: SN74LVC126AD and 74LVC126AD,118 are manufacturer-recommended alternatives, both carrying active product status. SN74LVC125AD is a parametric equivalent with active status. 74LVC126AS14-13 is also active. The original SN74LVC126ADG4 is discontinued, making active alternatives essential for new designs and production continuity.

Compliance & Certifications: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 (Unlimited) rating, ensuring regulatory alignment and handling compatibility with the original component.

Voltage Supply Range: The 74LVC126AD,118 from Nexperia extends the lower supply voltage limit to 1.2V, providing enhanced flexibility for low-voltage applications compared to the 1.65V minimum of other alternatives.

Inventory Availability: SN74LVC126AD offers the highest inventory level at 7557 pieces, followed by 74LVC126AD,118 at 5426 pieces, supporting high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC125AD be used as a direct replacement for SN74LVC126ADG4?

A: SN74LVC125AD meets all critical electrical and mechanical parameters: 4-element non-inverting buffer with 3-state output, 24mA output current, 1.65V–3.6V supply voltage, 14-SOIC package, and identical operating temperature range. It is a parametric equivalent with active product status and full compliance certifications.

Q: What is the difference between SN74LVC126AD and 74LVC126AD,118?

A: Both are non-inverting 4-element buffers with 3-state output in 14-SOIC packages. The primary difference is manufacturer: SN74LVC126AD is from Texas Instruments, while 74LVC126AD,118 is from Nexperia USA Inc. The Nexperia part extends the lower supply voltage limit to 1.2V, compared to 1.65V for the Texas Instruments version. Both are active products with full compliance.

Q: Is the 14-SOIC package identical across all substitute parts?

A: All substitute parts use the 14-SOIC package with 0.154" width (3.90mm). Physical dimensions and pin configurations are identical, ensuring direct PCB compatibility without layout modifications.

Q: Are there any supply voltage considerations when selecting a substitute?

A: All substitutes support the original 1.65V–3.6V range. The 74LVC126AD,118 from Nexperia extends operation down to 1.2V, offering additional flexibility for low-voltage designs. For standard 1.65V–3.6V applications, all alternatives are equivalent.

Q: Do all substitutes maintain the same output current specifications?

A: Yes. All substitute parts deliver 24mA output current for both high and low states, matching the original SN74LVC126ADG4 specifications.

Q: What is the MSL rating, and why does it matter?

A: All parts carry MSL 1 (Unlimited), indicating unlimited shelf life without moisture baking requirements. This ensures handling and storage compatibility with the original component across all substitutes.

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