74AC139MTCX Equivalent & Substitute Parts

Part Overview

The 74AC139MTCX is a decoder/demultiplexer logic integrated circuit manufactured by onsemi, featuring a 1 x 2:4 circuit configuration in a 16-TSSOP surface mount package. This component is currently in active production status. Substitute parts may be required due to inventory constraints, regional availability, or specific packaging requirements while maintaining functional and electrical compatibility.

Substiute Parts

74AC139MTCX

onsemiIn Stock: 445674AC139MTCX Datasheet

Current PartRFQ

MC74AC139DTR2G

onsemiIn Stock: 1241MC74AC139DTR2G Datasheet

DirectRFQ

CD74AC139M96

Harris CorporationIn Stock: 2125CD74AC139M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74AC139MTCX are classified based on the following substitution criteria:

Direct Substitutes maintain identical electrical specifications, circuit configuration, and package type. These parts are interchangeable without design modification.

Similar Substitutes share the same functional circuit (1 x 2:4 decoder/demultiplexer) and electrical performance but differ in package type or compliance status. These require physical layout adjustment but maintain full functional compatibility.

The key parameters determining substitutability are: circuit type (1 x 2:4 decoder/demultiplexer), output current capability (24mA), supply voltage range compatibility, and operating temperature range. Package type and RoHS compliance status are secondary considerations that may affect application suitability.

Parameter Comparison

Engineering Selection Recommendations

MC74AC139DTR2G is the primary direct substitute for 74AC139MTCX. Both parts are manufactured by onsemi, share identical electrical specifications and package configuration (16-TSSOP), and maintain active product status with ROHS3 compliance. This part provides full functional interchangeability without design modification.

CD74AC139M96 is a similar substitute suitable only when package type flexibility is acceptable. While this Harris Corporation part maintains the same decoder/demultiplexer circuit and output current specifications, it uses a 16-SOIC package instead of 16-TSSOP, requiring PCB layout modification. Additionally, this part carries obsolete status and does not meet RoHS3 compliance requirements. Selection of this substitute should be limited to applications where legacy component compatibility or extended temperature range (-55°C ~ 125°C) is specifically required and RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can MC74AC139DTR2G replace 74AC139MTCX without any design changes?

A: Yes. MC74AC139DTR2G is a direct substitute with identical electrical specifications, circuit configuration, and 16-TSSOP package type. No design modification is required.

Q: What is the primary difference between 74AC139MTCX and CD74AC139M96?

A: The primary difference is package type: 74AC139MTCX uses 16-TSSOP while CD74AC139M96 uses 16-SOIC. This requires PCB layout modification. Additionally, CD74AC139M96 is obsolete and RoHS non-compliant, whereas 74AC139MTCX is active and ROHS3 compliant.

Q: Are there supply voltage compatibility concerns between these parts?

A: 74AC139MTCX and MC74AC139DTR2G both operate at 2V ~ 6V. CD74AC139M96 operates at 1.5V ~ 5.5V, providing slightly lower minimum voltage but overlapping operational range for most applications.

Q: Which substitute should be selected for new designs?

A: MC74AC139DTR2G is the recommended substitute for new designs, as it maintains active product status, ROHS3 compliance, and identical package configuration to the original 74AC139MTCX.

Q: Is CD74AC139M96 suitable for applications requiring RoHS compliance?

A: No. CD74AC139M96 is RoHS non-compliant and carries obsolete status. It should not be selected for applications with RoHS compliance requirements.