SN74LVC138ARGYRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC138ARGYRG4 is a decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments, featuring a 1 x 3:8 configuration in a 16-VQFN (4x4.6) surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The device operates as a single-supply logic decoder with output drive capabilities suitable for digital signal routing and selection applications.

Substiute Parts

SN74LVC138ARGYRG4

Texas InstrumentsIn Stock: 1009SN74LVC138ARGYRG4 Datasheet

Current PartRFQ

SN74LVC138ARGYR

Texas InstrumentsIn Stock: 8713SN74LVC138ARGYR Datasheet

Parametric EquivalentRFQ

74LVC138ABQ,115

Nexperia USA Inc.In Stock: 932774LVC138ABQ,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74LVC138ARGYRG4 is determined by strict equivalence across the following critical parameters:

• Base product number (74LVC138 series)
• Circuit configuration (1 x 3:8 decoder/demultiplexer)
• Output drive current (24mA high and low)
• Single supply voltage operation
• Surface mount package compatibility
• RoHS3 compliance

Two substitute parts meet these criteria with variations in packaging format, voltage range, temperature range, and moisture sensitivity level.

Parameter Comparison

Engineering Selection Recommendations

SN74LVC138ARGYR is the primary parametric equivalent, manufactured by Texas Instruments with identical electrical specifications and package dimensions to the main part. This substitute maintains the same voltage supply range (1.65V ~ 3.6V) and operating temperature range (-40°C ~ 85°C). The part is currently active with significantly higher inventory availability (8700 units). Packaging is supplied in Cut Tape and Digi-Reel format.

74LVC138ABQ,115 is a manufacturer-recommended alternative from Nexperia USA Inc. This substitute offers extended operating temperature range (-40°C ~ 125°C) and lower minimum supply voltage (1.2V vs. 1.65V), providing broader application flexibility. The package footprint differs slightly (16-DHVQFN 2.5x4.6 versus 16-VQFN 4x4.6), requiring PCB layout verification. Moisture sensitivity is improved to Level 1 (Unlimited). This part is supplied in Tape & Reel format with high inventory availability (9244 units).

Both substitutes maintain RoHS3 compliance and identical output drive current specifications (24mA). Selection depends on specific application requirements regarding package dimensions, temperature operating range, and supply voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC138ARGYR directly replace SN74LVC138ARGYRG4 without PCB modifications?

A: Yes. Both parts share identical electrical specifications, output drive current (24mA), voltage supply range (1.65V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and package dimensions (16-VQFN 4x4.6). No circuit modifications are required.

Q: What are the package dimension differences between the substitutes?

A: SN74LVC138ARGYR uses 16-VQFN (4x4.6) package, matching the original part. The 74LVC138ABQ,115 uses 16-DHVQFN (2.5x4.6) package with different footprint dimensions. PCB layout verification is necessary if selecting the Nexperia part.

Q: Does the 74LVC138ABQ,115 operate at lower voltages than the original part?

A: Yes. The 74LVC138ABQ,115 supports minimum supply voltage of 1.2V compared to 1.65V for the original part, extending applicability to lower-voltage systems while maintaining the same maximum supply voltage (3.6V).

Q: What is the significance of Moisture Sensitivity Level differences?

A: The original part and SN74LVC138ARGYR both have MSL 2 (1 Year), requiring controlled storage conditions. The 74LVC138ABQ,115 has MSL 1 (Unlimited), eliminating moisture sensitivity storage constraints and reducing handling complexity.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All three parts—the original SN74LVC138ARGYRG4, SN74LVC138ARGYR, and 74LVC138ABQ,115—are ROHS3 compliant and REACH unaffected.

Q: Which substitute offers the best availability?

A: The 74LVC138ABQ,115 from Nexperia has the highest inventory (9244 units), followed by SN74LVC138ARGYR (8700 units). Both significantly exceed the original part's availability (927 units).