74ACT139MTC Equivalent & Substitute Parts

Part Overview

The 74ACT139MTC 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 classified as Obsolete product status. Identifying equivalent and substitute parts is necessary due to obsolescence, ensuring design continuity and supply chain reliability for applications requiring decoder/demultiplexer functionality with identical electrical and mechanical specifications.

Substiute Parts

74ACT139MTC

onsemiIn Stock: 201374ACT139MTC Datasheet

Current PartRFQ

MC74ACT139DTR2G

onsemiIn Stock: 3487MC74ACT139DTR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT139MTC is determined by strict equivalence across the following critical parameters:

• Circuit Type & Configuration: Decoder/Demultiplexer with 1 x 2:4 circuit and 2 independent circuits
• Electrical Specifications: Voltage supply range 4.5V ~ 5.5V, output current 24mA (high and low)
• Operating Temperature Range: -40°C ~ 85°C
• Package & Mounting: 16-TSSOP surface mount package with 0.173" (4.40mm) width
• Compliance & Certifications: ROHS3 Compliant, REACH Unaffected, MSL Level 1

The substitute part MC74ACT139DTR2G meets all these parameters identically, ensuring functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The MC74ACT139DTR2G is a direct functional equivalent to the 74ACT139MTC. Both parts are manufactured by onsemi within the 74ACT logic series and share identical electrical and mechanical specifications. The primary distinction is product status: the 74ACT139MTC is classified as Obsolete, while MC74ACT139DTR2G maintains Active status, ensuring continued availability and supply chain support.

Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements. The packaging difference (Tube versus Cut Tape) does not affect electrical performance and represents a supply format variation only. Selection between these parts should prioritize the Active product (MC74ACT139DTR2G) for new designs and ongoing production to ensure long-term component availability.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT139DTR2G replace 74ACT139MTC in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including voltage supply, output current, operating temperature range, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between Tube and Cut Tape packaging?

A: Tube and Cut Tape are supply formats only. Tube packaging provides components in a plastic tube for manual handling, while Cut Tape provides components on adhesive tape for automated pick-and-place assembly. The integrated circuit itself is identical in both formats.

Q: Why is 74ACT139MTC listed as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support for this part number. MC74ACT139DTR2G, with Active status, is the current equivalent offering from onsemi and is recommended for all new applications.

Q: Are there any compliance differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited) ratings.

Q: Is the 16-TSSOP package pinout identical between both parts?

A: Yes. Both parts use the 16-TSSOP package with 0.173" (4.40mm) width, ensuring identical PCB footprint and pinout compatibility.