SN74ALS139NG4 Equivalent & Substitute Parts

Part Overview

The SN74ALS139NG4 is a Decoder/Demultiplexer logic IC with 1 x 2:4 circuit configuration in a 16-DIP package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production needs. The part operates on single supply voltage and is suitable for applications requiring decoding or demultiplexing functions in digital logic circuits.

Substiute Parts

SN74ALS139NG4

Texas InstrumentsIn Stock: 721SN74ALS139NG4 Datasheet

Current PartRFQ

SN74ALS139N

Texas InstrumentsIn Stock: 2146SN74ALS139N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74ALS139NG4 is determined by the following critical parameters:

• Circuit Configuration: 1 x 2:4 Decoder/Demultiplexer function
• Independent Circuits: 2 circuits per package
• Package Type: 16-DIP (0.300", 7.62mm) through-hole mounting
• Electrical Specifications: Voltage supply 4.5V ~ 5.5V, output current ratings 400µA (high) and 8mA (low)
• Operating Temperature Range: 0°C ~ 70°C
• Compliance: ROHS3 compliant

The SN74ALS139N qualifies as a direct substitute because it maintains identical circuit configuration, package dimensions, electrical performance characteristics, and compliance certifications. The primary difference is product status and packaging format (tube vs. standard packaging).

Parameter Comparison

Engineering Selection Recommendations

The SN74ALS139N is the appropriate substitute for the discontinued SN74ALS139NG4. Both parts are manufactured by Texas Instruments and share identical electrical and mechanical specifications. The SN74ALS139N maintains active product status, ensuring availability for procurement and production requirements. Both parts comply with ROHS3 standards and REACH regulations, meeting environmental compliance requirements. The 16-DIP through-hole package format is identical, allowing direct board-level substitution without layout modifications. Selection of the SN74ALS139N eliminates obsolescence risk while maintaining full functional and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS139N be used as a direct replacement for the SN74ALS139NG4?

A: Yes. Both parts are identical in circuit configuration, package dimensions, electrical performance, and compliance certifications. The SN74ALS139N is the active equivalent and can be substituted directly.

Q: What is the difference between SN74ALS139NG4 and SN74ALS139N?

A: The primary difference is product status and packaging format. The SN74ALS139NG4 is discontinued, while the SN74ALS139N is active. The SN74ALS139N is supplied in tube packaging. Both maintain identical electrical and mechanical specifications.

Q: Are there any pin compatibility concerns?

A: No. Both parts use the 16-DIP (0.300", 7.62mm) package with identical pinout. Through-hole mounting is compatible with existing PCB designs without modification.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74ALS139NG4 and SN74ALS139N are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What voltage and current specifications apply to both parts?

A: Both parts operate on 4.5V to 5.5V single supply voltage with output current ratings of 400µA (high) and 8mA (low). Operating temperature range is 0°C to 70°C for both.