74LVC2G126RA3-7 Equivalent & Substitute Parts

Part Overview

The 74LVC2G126RA3-7 is a non-inverting buffer IC manufactured by Diodes Incorporated, classified as a logic component in the 74LVC series. This dual-element buffer features 3-state output capability and operates across a supply voltage range of 1.65V to 5.5V, making it suitable for mixed-voltage logic applications. The part is Active status and ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). Substitute parts are necessary when specific package variants, inventory availability, or design layout constraints require alternative mechanical configurations while maintaining electrical equivalence.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVC2G126RA3-7
Manufacturer	Diodes Incorporated
Series	74LVC
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	1
Output Type	3-State
Current - Output High, Low	32mA, 32mA
Voltage - Supply	1.65V ~ 5.5V
Operating Temperature	-40°C ~ 125°C (TA)
Package / Case	8-XFDFN
Supplier Device Package	X2-DFN1210-8
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74LVC2G126RA3-7 are grouped into two functional categories based on element count and package configuration:

Category 1: Dual-Element 8-Pin Packages (Direct Functional Equivalents) These parts maintain the 2-element, 1-bit configuration in 8-pin DFN packages. Substitution is valid when the supplier device package differs (X2-DFN2010-8, X2-DFN1410-8, X2-DFN1210-8) while preserving all electrical parameters: 32mA output current, 1.65V–5.5V supply voltage, -40°C to 125°C operating temperature, and 3-state output capability.

Category 2: Single-Element 6-Pin Packages (Functional Reduction) These parts reduce the element count from 2 to 1 while maintaining per-element electrical specifications. Substitution requires design accommodation for reduced channel count. All parts maintain identical electrical parameters per element: 32mA output current, 1.65V–5.5V supply voltage, -40°C to 125°C operating temperature, and 3-state output capability.

Key substitution parameters are: Logic Type (Buffer, Non-Inverting), Output Type (3-State), Current ratings (32mA), Supply voltage range (1.65V–5.5V), Operating temperature range (-40°C–125°C), Product Status (Active), and RoHS compliance (ROHS3).

Parameter Comparison

Part Number	Elements	Bits/Element	Package	Supplier Package	Output Current (mA)	Supply Voltage	Temp Range	Inventory (Pcs)
74LVC2G126RA3-7	2	1	8-XFDFN	X2-DFN1210-8	32/32	1.65V–5.5V	-40°C–125°C	3790
74LVC2G125HD4-7	2	1	8-XFDFN	X2-DFN2010-8	32/32	1.65V–5.5V	-40°C–125°C	3000
74LVC2G125HK3-7	2	1	8-XFDFN	X2-DFN1410-8	32/32	1.65V–5.5V	-40°C–125°C	1015
74LVC2G125RA3-7	2	1	8-XFDFN	X2-DFN1210-8	32/32	1.65V–5.5V	-40°C–125°C	6089
74LVC1G126FW4-7	1	1	6-XFDFN	X2-DFN1010-6	32/32	1.65V–5.5V	-40°C–125°C	30100
74LVC1G126FW5-7	1	1	6-XFDFN	X1-DFN1010-6	32/32	1.65V–5.5V	-40°C–125°C	6070
74LVC1G126FX4-7	1	1	6-XFDFN	X2-DFN1409-6	32/32	1.65V–5.5V	-40°C–125°C	766
74LVC1G125FW4-7	1	1	6-XFDFN	X2-DFN1010-6	32/32	1.65V–5.5V	-40°C–125°C	10200
74LVC1G125FW5-7	1	1	6-XFDFN	X1-DFN1010-6	32/32	1.65V–5.5V	-40°C–125°C	5957
74LVC1G125FX4-7	1	1	6-XFDFN	X2-DFN1409-6	32/32	1.65V–5.5V	-40°C–125°C	990
74LVC1G125FZ4-7	1	1	6-XFDFN	X2-DFN1410-6	32/32	1.65V–5.5V	-40°C–125°C	35100

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the original 74LVC2G126RA3-7.

For applications requiring dual-element configuration with identical electrical performance, select from the 8-pin dual-element group: 74LVC2G125HD4-7, 74LVC2G125HK3-7, or 74LVC2G125RA3-7. These parts differ only in supplier device package (X2-DFN2010-8, X2-DFN1410-8, or X2-DFN1210-8), which affects PCB footprint and layout compatibility. The 74LVC2G125RA3-7 shares the identical supplier package (X2-DFN1210-8) with the main part.

For applications where single-element configuration is acceptable, the 6-pin single-element group provides higher inventory availability. Within this group, parts are differentiated by supplier device package: X2-DFN1010-6 (74LVC1G126FW4-7, 74LVC1G125FW4-7), X1-DFN1010-6 (74LVC1G126FW5-7, 74LVC1G125FW5-7), and X2-DFN1409-6 (74LVC1G126FX4-7, 74LVC1G125FX4-7). Selection depends on PCB layout constraints and available footprint space.

Frequently Asked Questions (FAQ)

Q: Can I substitute a single-element part (74LVC1G126FW4-7) for the dual-element 74LVC2G126RA3-7? A: Yes, if your circuit design requires only one buffer element. The electrical specifications per element are identical. However, this substitution requires circuit redesign to accommodate the reduced channel count and different pin configuration.

Q: What is the difference between 74LVC2G125RA3-7 and 74LVC2G126RA3-7? A: Both are dual-element, non-inverting buffers with identical electrical parameters and the same supplier device package (X2-DFN1210-8). They differ in base product number (74LVC2G125 vs. 74LVC2G126), indicating different internal logic configurations. Verify datasheet compatibility before substitution.

Q: Do all substitute parts have the same PCB footprint? A: No. The 8-pin parts (74LVC2G125HD4-7, 74LVC2G125HK3-7, 74LVC2G125RA3-7) share the same 8-pin DFN package but differ in supplier device package dimensions. The 6-pin parts have a different footprint entirely. Confirm supplier device package compatibility with your PCB design before selection.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited), matching the compliance profile of the 74LVC2G126RA3-7.

Q: Which substitute part has the highest inventory availability? A: The 74LVC1G125FZ4-7 has the highest inventory at 35,100 pieces. If inventory availability is a critical factor, this part offers the best supply security, provided your design can accommodate single-element configuration and the X2-DFN1410-6 package.

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