CD74HCT139M Equivalent & Substitute Parts

Part Overview

The CD74HCT139M is a high-speed CMOS logic decoder/demultiplexer manufactured by Texas Instruments, configured as a 1 x 2:4 decoder with two independent circuits. This component is classified as Active product status and is currently in stock with 1,068 pieces available. The CD74HCT139M operates as a single-supply decoder/demultiplexer suitable for digital logic applications requiring address decoding or signal demultiplexing functions.

Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when design requirements necessitate alternative packaging or compliance certifications. The following equivalent parts maintain functional and electrical compatibility while offering different manufacturer sources, packaging options, or compliance profiles.

Substiute Parts

CD74HCT139M

Texas InstrumentsIn Stock: 1125CD74HCT139M Datasheet

Current PartRFQ

CD74HCT139M96

Harris CorporationIn Stock: 3335CD74HCT139M96 Datasheet

MFR RecommendedRFQ

74HCT04PW,118

Nexperia USA Inc.In Stock: 745174HCT04PW,118 Datasheet

SimilarRFQ

74HCT139D,653

Nexperia USA Inc.In Stock: 422374HCT139D,653 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT139M is determined by the following critical parameters:

Primary Substitution Criteria:

• Decoder/Demultiplexer type with 1 x 2:4 circuit configuration
• Two independent circuits
• Output current capability of 4mA (high and low)
• Single supply voltage operation at 4.5V ~ 5.5V
• Surface mount packaging in 16-SOIC form factor
• 74HCT logic series classification

Substitution Logic: Parts meeting all primary criteria are classified as direct functional equivalents. Variations in product status, manufacturer source, packaging format (Bulk vs. Tape & Reel), compliance certifications, and operating temperature ranges are secondary considerations that do not affect core electrical compatibility.

The 74HCT04PW,118 is included in the substitute list but represents a different logic function (Inverter IC) and does not meet the primary substitution criteria for decoder/demultiplexer applications.

Parameter Comparison

Engineering Selection Recommendations

Direct Functional Equivalents (Decoder/Demultiplexer 1 x 2:4):

74HCT139D,653 (Nexperia USA Inc.) is the primary recommended substitute for the CD74HCT139M. This part maintains identical electrical specifications, operates within the same voltage and temperature parameters, and carries Active product status. The 74HCT139D,653 is ROHS3 compliant and available in Tape & Reel packaging format with 4,167 pieces in stock. The operating temperature range is -40°C ~ 125°C, which is narrower than the main part but suitable for most industrial and commercial applications.

CD74HCT139M96 (Harris Corporation) is functionally equivalent with identical electrical and thermal specifications. However, this part carries Obsolete product status and is RoHS non-compliant. Selection of this substitute should be limited to legacy system maintenance or applications where RoHS compliance is not required. The part is available in Bulk packaging format with 3,276 pieces in stock.

Non-Equivalent Reference:

74HCT04PW,118 (Nexperia USA Inc.) is a 6-channel inverter IC and does not function as a decoder/demultiplexer. This part is included in the original substitute list but is not electrically compatible with the CD74HCT139M for decoder applications. This part should not be selected as a substitute.

Frequently Asked Questions (FAQ)

Q: Can the 74HCT139D,653 directly replace the CD74HCT139M in existing designs?

A: Yes. The 74HCT139D,653 maintains identical decoder/demultiplexer functionality, circuit configuration (1 x 2:4), output current specifications (4mA), and supply voltage range (4.5V ~ 5.5V). Both parts use 16-SOIC surface mount packaging. The operating temperature range of the 74HCT139D,653 (-40°C ~ 125°C) is narrower than the CD74HCT139M (-55°C ~ 125°C), so applications requiring operation below -40°C require verification of the specific temperature requirements.

Q: What is the difference between the CD74HCT139M96 and the 74HCT139D,653?

A: Both parts are functionally equivalent 1 x 2:4 decoders with identical electrical specifications. The primary differences are: (1) CD74HCT139M96 is Obsolete product status while 74HCT139D,653 is Active; (2) CD74HCT139M96 is RoHS non-compliant while 74HCT139D,653 is ROHS3 compliant; (3) CD74HCT139M96 is supplied in Bulk packaging while 74HCT139D,653 is supplied in Tape & Reel format.

Q: Why is the 74HCT04PW,118 listed as a substitute if it is not compatible?

A: The 74HCT04PW,118 is included in the original substitute list provided but is not a functional equivalent. This part is a 6-channel inverter IC and does not perform decoder/demultiplexer functions. It should not be selected for applications requiring 1 x 2:4 decoder functionality.

Q: What packaging format should be selected for production assembly?

A: The 74HCT139D,653 is supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly processes. The CD74HCT139M96 is supplied in Bulk format, which is less suitable for high-volume automated assembly but may be acceptable for manual or low-volume operations.

Q: Are there temperature range considerations when substituting parts?

A: The CD74HCT139M operates from -55°C ~ 125°C, while the 74HCT139D,653 operates from -40°C ~ 125°C. If the application requires operation below -40°C, the 74HCT139D,653 is not suitable. The CD74HCT139M96 maintains the full -55°C ~ 125°C range but carries Obsolete status and RoHS non-compliance.

Q: What is the significance of RoHS compliance status?

A: ROHS3 compliance (74HCT139D,653) indicates the part meets Restriction of Hazardous Substances regulations and is suitable for applications subject to environmental compliance requirements. RoHS non-compliant parts (CD74HCT139M96) may be restricted in certain markets or applications. The CD74HCT139M has Vendor Undefined RoHS status and requires clarification from the supplier.