CD74HC139MT Equivalent & Substitute Parts

Part Overview

The CD74HC139MT is a Decoder/Demultiplexer logic IC manufactured by Texas Instruments, featuring a 1 x 2:4 circuit configuration in a 16-SOIC surface mount package. This part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing design support and production continuity. The CD74HC139MT operates across a wide temperature range and is suitable for applications requiring reliable demultiplexing functionality in industrial and commercial environments.

Substiute Parts

CD74HC139MT

Texas InstrumentsIn Stock: 922CD74HC139MT Datasheet

Current PartRFQ

CD74HC139M96

Texas InstrumentsIn Stock: 2220CD74HC139M96 Datasheet

Parametric EquivalentRFQ

74HC139D,653

Nexperia USA Inc.In Stock: 3890174HC139D,653 Datasheet

MFR RecommendedRFQ

MC74HC139ADG

onsemiIn Stock: 2115MC74HC139ADG Datasheet

MFR RecommendedRFQ

MC74HC139ADR2G

onsemiIn Stock: 7426MC74HC139ADR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC139MT is determined by strict equivalence across the following critical parameters:

• Circuit configuration (1 x 2:4 decoder/demultiplexer)
• Independent circuits count (2)
• Output current specifications (5.2mA high and low)
• Supply voltage range (2V ~ 6V)
• Operating temperature range (-55°C ~ 125°C minimum)
• Package type (16-SOIC surface mount)
• RoHS3 compliance and MSL rating

Substitute parts must maintain identical electrical performance and physical compatibility. Packaging format (tube, tape & reel) does not affect functional equivalence but may impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain full electrical and mechanical compatibility with the CD74HC139MT across the specified parameter set. Selection should prioritize parts with Active product status for long-term availability assurance.

CD74HC139M96 (Texas Instruments, Active) and MC74HC139ADR2G (onsemi, Active) are recommended as primary substitutes, offering continued manufacturer support and standard tape & reel packaging suitable for automated assembly processes.

74HC139D,653 (Nexperia USA Inc., Active) provides an alternative from a different manufacturer while maintaining all critical electrical parameters. The operating temperature range extends to -40°C minimum rather than -55°C; this substitution is valid for applications not requiring the extended lower temperature specification.

MC74HC139ADG (onsemi, Obsolete) shares identical electrical specifications with the main part but carries Obsolete status, limiting its suitability for new designs despite current inventory availability.

All substitute parts carry ROHS3 compliance and MSL Level 1 rating, confirming environmental and moisture handling equivalence.

Frequently Asked Questions (FAQ)

Q: Can CD74HC139M96 directly replace CD74HC139MT in existing designs?

A: Yes. Both parts are manufactured by Texas Instruments with identical circuit configuration (1 x 2:4), output current (5.2mA), supply voltage (2V ~ 6V), operating temperature range (-55°C ~ 125°C), and 16-SOIC package. The primary difference is packaging format (tape & reel versus tube) and product status (Active versus Obsolete).

Q: What is the significance of the operating temperature range difference in 74HC139D,653?

A: The 74HC139D,653 specifies -40°C ~ 125°C versus -55°C ~ 125°C for the CD74HC139MT. This part is suitable for applications operating within the -40°C to 125°C range. Applications requiring operation below -40°C must use alternatives maintaining the -55°C minimum specification.

Q: Are there functional differences between Texas Instruments, Nexperia, and onsemi versions?

A: No. All substitute parts maintain identical decoder/demultiplexer functionality, circuit configuration, and electrical performance. Differences are limited to manufacturer identity, product status, and packaging format.

Q: Does packaging format (tube versus tape & reel) affect electrical performance?

A: No. Packaging format affects procurement, storage, and assembly workflow only. Electrical and mechanical specifications remain identical regardless of packaging format.

Q: Which substitute should be selected for new production designs?

A: MC74HC139ADR2G (onsemi, Active, tape & reel) or CD74HC139M96 (Texas Instruments, Active, tape & reel) are recommended for new designs due to Active product status, ensuring long-term availability and manufacturer support.