74ACT139SJ Equivalent & Substitute Parts

Part Overview

The 74ACT139SJ is a Decoder/Demultiplexer logic IC with 1 x 2:4 circuit configuration, manufactured by onsemi in a 16-SOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The 74ACT139 series provides standard decoder/demultiplexer functionality suitable for digital logic applications requiring signal routing and decoding operations.

Substiute Parts

74ACT139SJ

onsemiIn Stock: 84674ACT139SJ Datasheet

Current PartRFQ

CD74ACT139M

Harris CorporationIn Stock: 7082CD74ACT139M Datasheet

SimilarRFQ

CD74ACT139M96

Texas InstrumentsIn Stock: 31774CD74ACT139M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACT139SJ is determined by the following critical parameters:

• Circuit Configuration: Must be 1 x 2:4 Decoder/Demultiplexer with 2 independent circuits
• Output Current Specifications: Must support 24mA output current (high and low)
• Supply Voltage: Must operate within 4.5V ~ 5.5V range
• Mounting Type: Must be Surface Mount
• Package Compatibility: 16-SOIC or 16-SOP packages are functionally equivalent

The identified substitute parts (CD74ACT139M and CD74ACT139M96) meet all critical electrical parameters and package requirements. Differences in operating temperature range and product status do not affect functional substitution capability within the specified supply voltage and output current parameters.

Parameter Comparison

Engineering Selection Recommendations

CD74ACT139M96 (Texas Instruments) is the preferred substitute for new designs and procurement. This part is currently active in production status, ensuring long-term availability and supply chain stability. The CD74ACT139M96 meets ROHS3 compliance requirements and maintains full electrical equivalence with the original 74ACT139SJ across all critical parameters: circuit configuration, output current ratings, and supply voltage specifications.

CD74ACT139M (Harris Corporation) provides functional equivalence but carries obsolete product status classification, similar to the original part. This option is suitable only when existing inventory must be utilized or when RoHS non-compliance is acceptable for the application.

Both substitute parts feature extended operating temperature ranges (-55°C ~ 125°C) compared to the original specification (-40°C ~ 85°C), providing additional thermal margin for demanding environments.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT139M96 directly replace 74ACT139SJ in existing designs?

A: Yes. Both parts share identical circuit configuration (1 x 2:4), output current specifications (24mA), and supply voltage range (4.5V ~ 5.5V). The 16-SOIC package is pin-compatible with the original 16-SOP package for surface mount applications.

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

A: The width dimension differs, but both are 16-pin SOIC packages with identical pin pitch and electrical characteristics. The 3.90mm width variant (CD74ACT139M and CD74ACT139M96) represents a more compact package footprint suitable for space-constrained PCB layouts.

Q: Why is CD74ACT139M96 recommended over CD74ACT139M?

A: CD74ACT139M96 maintains active product status with current manufacturing support and ROHS3 compliance certification. CD74ACT139M is obsolete and RoHS non-compliant, limiting its suitability for new designs and regulated applications.

Q: Are there any electrical performance differences between these parts?

A: No. All three parts (74ACT139SJ, CD74ACT139M, CD74ACT139M96) deliver identical output current, supply voltage operation, and decoder/demultiplexer functionality. The substitute parts offer extended operating temperature ranges, which provides additional design margin without affecting nominal performance.

Q: What certifications apply to each part?

A: 74ACT139SJ and CD74ACT139M96 are REACH Unaffected. CD74ACT139M96 carries ROHS3 Compliant certification. CD74ACT139M is RoHS non-compliant. All parts are classified as EAR99 for export control purposes.