SN74LVC139ADRG4 Equivalent & Substitute Parts

Part Overview

The SN74LVC139ADRG4 is a Decoder/Demultiplexer logic IC manufactured by Texas Instruments, featuring a 1 x 2:4 circuit configuration in a 16-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The device operates across a single supply voltage range of 1.65V to 3.6V with output currents of 24mA for both high and low states, suitable for low-voltage logic applications requiring demultiplexing functionality.

Substiute Parts

SN74LVC139ADRG4

Texas InstrumentsIn Stock: 901SN74LVC139ADRG4 Datasheet

Current PartRFQ

SN74LVC139ADR

Texas InstrumentsIn Stock: 3325SN74LVC139ADR Datasheet

MFR RecommendedRFQ

SN74LVC139ADT

Texas InstrumentsIn Stock: 1913SN74LVC139ADT Datasheet

Parametric EquivalentRFQ

74LVC139D,118

Nexperia USA Inc.In Stock: 156974LVC139D,118 Datasheet

MFR RecommendedRFQ

MC74LCX139DR2G

onsemiIn Stock: 3451MC74LCX139DR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74LVC139ADRG4 is determined by strict equivalence across the following critical parameters:

• Circuit configuration (1 x 2:4 decoder/demultiplexer)
• Independent circuits count (2)
• Package type (16-SOIC surface mount)
• Output current specifications (24mA high, 24mA low)
• Supply voltage compatibility (minimum 1.65V to 3.6V range)
• Operating temperature range (-40°C to 85°C minimum)
• RoHS3 compliance and MSL rating (1 - Unlimited)

Substitute parts are grouped by manufacturer recommendation status and parametric equivalence. All listed substitutes maintain identical functional specifications and package dimensions, ensuring direct replacement capability in existing PCB designs.

Parameter Comparison

Engineering Selection Recommendations

For direct replacement of the discontinued SN74LVC139ADRG4, the Texas Instruments SN74LVC139ADR and SN74LVC139ADT are the primary substitutes. Both parts are currently active in production, maintain identical electrical specifications, and are packaged in the same 16-SOIC form factor. The SN74LVC139ADR is available in Cut Tape and Digi-Reel packaging, while the SN74LVC139ADT is supplied in Tape & Reel format.

The Nexperia 74LVC139D,118 provides an alternative from a different manufacturer with identical functional parameters. This part supports an extended operating temperature range of -40°C to 125°C, which may be advantageous in high-temperature applications. However, the minimum supply voltage is 2.7V, which restricts use in applications requiring operation below this threshold.

The onsemi MC74LCX139DR2G is listed as obsolete and should not be selected for new designs or long-term production applications. While it maintains compatible electrical specifications, its obsolete status presents supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC139ADR and SN74LVC139ADT be used interchangeably with SN74LVC139ADRG4?

A: Yes. Both parts are parametrically equivalent to the original part across all critical specifications: circuit configuration, output current, supply voltage range, operating temperature, and package dimensions. The primary difference is packaging format (Cut Tape/Digi-Reel versus Tape & Reel) and active product status.

Q: What is the difference between SN74LVC139ADR and SN74LVC139ADT?

A: Both parts are electrically identical. The difference is in packaging and delivery format. SN74LVC139ADR is supplied in Cut Tape and Digi-Reel formats, while SN74LVC139ADT is supplied in Tape & Reel format. Selection depends on your procurement and assembly requirements.

Q: Can the Nexperia 74LVC139D,118 replace the SN74LVC139ADRG4 in all applications?

A: The Nexperia part is functionally equivalent for most applications. However, its minimum supply voltage is 2.7V compared to 1.65V for the original part. If your application operates below 2.7V, the Nexperia substitute is not suitable. The extended temperature range to 125°C may be beneficial for high-temperature environments.

Q: Why is MC74LCX139DR2G not recommended as a substitute?

A: The MC74LCX139DR2G is marked as obsolete, indicating it is no longer in active production. This creates supply chain uncertainty and potential availability issues for future procurement. Active alternatives should be prioritized for new designs and ongoing production.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring compatibility with modern manufacturing and environmental standards.

Q: Can I mix different substitute parts in the same production batch?

A: Yes. All substitute parts are parametrically equivalent and pin-compatible. However, for traceability and quality control purposes, maintaining consistent part sourcing within a single production batch is recommended.