74LVC139D,112 Equivalent & Substitute Parts

Part Overview

The 74LVC139D,112 is a dual 2-to-4 line decoder/demultiplexer manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This logic IC is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement. The device operates as a decoder with 1 x 2:4 circuit configuration and 2 independent circuits, suitable for address decoding and signal routing applications in digital systems.

Substiute Parts

74LVC139D,112

Nexperia USA Inc.In Stock: 70374LVC139D,112 Datasheet

Current PartRFQ

MC74LCX139DR2G

onsemiIn Stock: 3451MC74LCX139DR2G Datasheet

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SN74LVC139AD

Texas InstrumentsIn Stock: 1976SN74LVC139AD Datasheet

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SN74LVC139ADR

Texas InstrumentsIn Stock: 3325SN74LVC139ADR Datasheet

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SN74LVC139ADT

Texas InstrumentsIn Stock: 1913SN74LVC139ADT Datasheet

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SN74LVC139ANS

Texas InstrumentsIn Stock: 31909SN74LVC139ANS Datasheet

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SN74LVC139ANSR

Texas InstrumentsIn Stock: 4889SN74LVC139ANSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVC139D,112 is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain the identical 1 x 2:4 decoder/demultiplexer configuration with 2 independent circuits and 24mA output current capability.

Package Compatibility: Substitute parts are grouped by package type. The primary 74LVC139D,112 uses a 16-SOIC package (0.154", 3.90mm width). Substitutes include both 16-SOIC (0.154", 3.90mm) and 16-SO (0.209", 5.30mm) variants. Package selection depends on PCB layout constraints and footprint availability.

Voltage Supply Range: The original part operates at 2.7V ~ 3.6V. Substitute parts from Texas Instruments (SN74LVC139 series) support extended voltage ranges of 1.65V ~ 3.6V, providing broader supply compatibility. The onsemi MC74LCX139DR2G operates at 2V ~ 3.6V.

Operating Temperature: The original part supports -40°C ~ 125°C. Most active substitutes operate at -40°C ~ 85°C, which covers standard industrial and commercial temperature ranges. Application requirements determine if the extended upper temperature limit of the original part is necessary.

Product Status and Availability: Active substitute parts from Texas Instruments and onsemi ensure long-term availability and supply chain continuity compared to the obsolete original part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The Texas Instruments SN74LVC139AD, SN74LVC139ADR, and SN74LVC139ADT are active products with extended voltage supply range (1.65V ~ 3.6V) and full ROHS3 compliance. These parts provide superior supply chain continuity and are suitable for applications requiring long-term component availability. Selection between these variants depends on packaging requirements: SN74LVC139AD (Tube), SN74LVC139ADR (Cut Tape/Digi-Reel), or SN74LVC139ADT (Tape & Reel).

Package-Specific Considerations:

For PCB designs with 16-SOIC (0.154", 3.90mm) footprints, use SN74LVC139AD, SN74LVC139ADR, or SN74LVC139ADT. For designs accommodating 16-SOIC (0.209", 5.30mm) footprints, SN74LVC139ANS or SN74LVC139ANSR are available. The SN74LVC139ANS has MSL 3 rating; verify moisture handling procedures if required.

Alternative Substitute:

The onsemi MC74LCX139DR2G maintains functional equivalence and operates at 2V ~ 3.6V. This part is classified as obsolete but remains available in inventory. Use only if Texas Instruments parts are unavailable.

Temperature Range Consideration:

Applications requiring operation above 85°C must retain the original 74LVC139D,112 or identify alternative decoder architectures. All active substitutes are limited to -40°C ~ 85°C maximum operating temperature.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 74LVC139D,112 with any of the listed substitutes?

A: Direct replacement is possible for most applications. All substitutes maintain identical decoder/demultiplexer functionality (1 x 2:4 configuration), output current (24mA), and surface mount package type. Verify package dimensions match your PCB footprint. If your application requires operation above 85°C, substitutes are not suitable.

Q: What is the difference between the 16-SOIC (0.154", 3.90mm) and 16-SOIC (0.209", 5.30mm) packages?

A: Both are 16-pin SOIC packages but differ in body width. The 0.154" width is narrower and more compact; the 0.209" width is wider. PCB footprints are not interchangeable. Confirm your design footprint before selecting a substitute part.

Q: Why do Texas Instruments parts support lower voltage (1.65V) than the original Nexperia part (2.7V)?

A: Texas Instruments SN74LVC139 series uses enhanced low-voltage design techniques, enabling operation at 1.65V minimum. The Nexperia 74LVC139D,112 requires 2.7V minimum. Both ranges overlap at 2.7V ~ 3.6V, ensuring compatibility in standard 3.3V and 5V logic systems.

Q: Is the onsemi MC74LCX139DR2G a suitable substitute?

A: The MC74LCX139DR2G is functionally equivalent and maintains the same package and output specifications. However, it is classified as obsolete. Use only if active Texas Instruments alternatives are unavailable. The onsemi part operates at 2V ~ 3.6V, providing broader voltage compatibility than the original Nexperia part.

Q: What does MSL 3 (168 Hours) mean for the SN74LVC139ANS?

A: Moisture Sensitivity Level 3 indicates the component requires controlled moisture exposure during storage and handling. The part must be used within 168 hours of package opening under specified humidity conditions. MSL 1 parts (unlimited) have no such restrictions. Verify your manufacturing environment supports MSL 3 handling if selecting this variant.

Q: Are all substitutes RoHS3 compliant?

A: Most substitutes are ROHS3 compliant. The SN74LVC139ANS lists RoHS status as "Not Applicable." Confirm RoHS compliance requirements for your application and supply chain before final part selection.

Q: Can I use these substitutes in high-temperature applications?

A: All active substitutes operate at -40°C ~ 85°C maximum. The original 74LVC139D,112 supports -40°C ~ 125°C. If your application requires operation above 85°C, substitutes are not suitable. Consult alternative decoder architectures or contact manufacturers for extended-temperature variants.