74HCT139D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT139D,652 is a Decoder/Demultiplexer logic integrated circuit manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This component features a 1 x 2:4 decoder configuration with dual independent circuits, designed for signal routing and selection applications in digital systems. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

74HCT139D,652

Nexperia USA Inc.In Stock: 111274HCT139D,652 Datasheet

Current PartRFQ

CD74HCT139M

Harris CorporationIn Stock: 1448CD74HCT139M Datasheet

UpgradeRFQ

CD74HCT139M96

Harris CorporationIn Stock: 3335CD74HCT139M96 Datasheet

UpgradeRFQ

CD74HCT139MT

Texas InstrumentsIn Stock: 984CD74HCT139MT Datasheet

UpgradeRFQ

SN74HCT139D

Texas InstrumentsIn Stock: 791SN74HCT139D Datasheet

SimilarRFQ

SN74HCT139DR

Texas InstrumentsIn Stock: 2921SN74HCT139DR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT139D,652 is determined by the following critical parameters:

• Circuit configuration: 1 x 2:4 decoder/demultiplexer topology
• Independent circuits: 2
• Output current capability: 4mA high, 4mA low
• Supply voltage range: 4.5V ~ 5.5V
• Package type: 16-SOIC surface mount
• Mounting compatibility: Surface mount technology

Substitute parts are classified into two categories:

Upgrade Substitutes maintain full electrical and mechanical compatibility with identical or extended operating temperature ranges and improved compliance status.

Similar Substitutes provide functional equivalence with the same circuit configuration and package but may have different temperature specifications or product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74HCT139DR

The SN74HCT139DR from Texas Instruments is the optimal substitute for the 74HCT139D,652. This part maintains active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant with MSL 1 rating, meeting modern environmental and reliability standards. The 16-SOIC package and electrical specifications are identical to the main part. Operating temperature range of -40°C ~ 85°C covers the lower end of the original specification; applications requiring the full -40°C ~ 125°C range should evaluate CD74HCT139M or CD74HCT139MT.

Secondary Recommendation: CD74HCT139MT

The CD74HCT139MT from Texas Instruments provides extended operating temperature coverage (-55°C ~ 125°C) and ROHS3 compliance. This part is suitable for applications requiring the full temperature range of the original component. Product status is discontinued at DiGi Electronics; verify availability before design commitment.

Alternative Consideration: CD74HCT139M and CD74HCT139M96

Both Harris Corporation variants (CD74HCT139M and CD74HCT139M96) offer extended temperature range (-55°C ~ 125°C) but are RoHS non-compliant. These parts are classified as obsolete. Selection should be limited to legacy system maintenance where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCT139DR directly replace the 74HCT139D,652 in existing designs?

A: Yes. The SN74HCT139DR provides identical electrical performance and 16-SOIC package compatibility. Pin configuration, voltage supply requirements, output current ratings, and circuit topology are equivalent. The operating temperature range (-40°C ~ 85°C) covers standard industrial applications; designs requiring operation above 85°C should use CD74HCT139MT.

Q: What is the difference between the CD74HCT139M and CD74HCT139M96 variants?

A: Both parts are functionally identical with the same electrical specifications and extended temperature range (-55°C ~ 125°C). The primary difference is packaging: CD74HCT139M is supplied in tube packaging, while CD74HCT139M96 is supplied in bulk. Both are RoHS non-compliant and obsolete.

Q: Why is the SN74HCT139DR preferred over other substitutes?

A: The SN74HCT139DR maintains active product status, ensuring continued availability and manufacturing support. It is ROHS3 compliant and carries MSL 1 rating, meeting current environmental and reliability requirements. These factors provide superior long-term supply chain security compared to obsolete or discontinued alternatives.

Q: Are there any temperature-related limitations when substituting with SN74HCT139DR?

A: The SN74HCT139DR operates from -40°C ~ 85°C, which is narrower than the original 74HCT139D,652 range of -40°C ~ 125°C. Applications requiring operation above 85°C must use CD74HCT139MT (-55°C ~ 125°C) or CD74HCT139M (-55°C ~ 125°C).

Q: What packaging options are available for 74HCT139 decoder substitutes?

A: All listed substitutes are supplied in 16-SOIC surface mount packages with identical 0.154" (3.90mm) width. Packaging format options include tube (CD74HCT139M), bulk (CD74HCT139M96), and cut tape with Digi-Reel (SN74HCT139DR). Select based on procurement volume and assembly requirements.

Q: Is RoHS compliance a consideration for substitute selection?

A: RoHS compliance status depends on application requirements and regulatory jurisdiction. The SN74HCT139DR, CD74HCT139MT, and original 74HCT139D,652 are ROHS3 compliant. The Harris Corporation variants (CD74HCT139M and CD74HCT139M96) are RoHS non-compliant. For new designs and regulated applications, ROHS3-compliant parts are recommended.