SN74LS139ADRE4 Equivalent & Substitute Parts

Part Overview

The SN74LS139ADRE4 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 discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The device operates on single supply voltage and is designed for standard TTL logic applications requiring decoding or demultiplexing functions.

Substiute Parts

SN74LS139ADRE4

Texas InstrumentsIn Stock: 1055SN74LS139ADRE4 Datasheet

Current PartRFQ

SN74LS139ADR

Texas InstrumentsIn Stock: 25097SN74LS139ADR Datasheet

Parametric EquivalentRFQ

SN74LS155ADR

Texas InstrumentsIn Stock: 5970SN74LS155ADR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS139ADRE4 are qualified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

• Circuit configuration: 1 x 2:4 decoder/demultiplexer
• Independent circuits: 2
• Package type: 16-SOIC surface mount
• Voltage supply range: 4.75V ~ 5.25V
• Output current specifications: 400µA (high), 8mA (low)
• Operating temperature range: 0°C ~ 70°C
• RoHS3 compliance and MSL rating

All substitute parts listed maintain identical electrical performance and physical compatibility with the original SN74LS139ADRE4, differing only in packaging format (tape & reel vs. digi-reel) and product status (active vs. discontinued).

Parameter Comparison

Engineering Selection Recommendations

Both SN74LS139ADR and SN74LS155ADR are direct functional equivalents to the discontinued SN74LS139ADRE4. Selection between these substitutes should be based on:

SN74LS139ADR: Recommended for applications requiring flexibility in packaging format. This part is available in both Cut Tape and Digi-Reel formats, providing options for different procurement and assembly workflows. Active product status ensures long-term availability.

SN74LS155ADR: Suitable for high-volume production environments utilizing automated tape & reel assembly processes. Active product status and established supply chain support continuous manufacturing operations.

Both substitutes maintain full electrical and mechanical compatibility with the original part. All three parts carry ROHS3 compliance and identical MSL ratings, ensuring environmental and regulatory compliance across applications.

Frequently Asked Questions (FAQ)

Q: Can SN74LS139ADR and SN74LS155ADR be used interchangeably with SN74LS139ADRE4?

A: Yes. Both substitute parts are parametric equivalents with identical electrical specifications, circuit configuration, and 16-SOIC package dimensions. The only differences are packaging format (tape & reel vs. digi-reel) and product status (active vs. discontinued).

Q: What is the difference between the packaging formats offered?

A: SN74LS139ADR is available in Cut Tape and Digi-Reel formats, providing flexibility for manual or semi-automated assembly. SN74LS155ADR is supplied in Tape & Reel format, optimized for fully automated pick-and-place assembly systems. All formats contain the same die and electrical performance.

Q: Are there any functional differences between these parts?

A: No. All three parts feature identical decoder/demultiplexer functionality with 1 x 2:4 circuit configuration, 2 independent circuits, and matching output current specifications. Electrical performance and pin compatibility are guaranteed.

Q: Do these substitutes meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant with MSL rating of 1 (Unlimited), REACH unaffected status, and identical ECCN and HTSUS classifications.

Q: Why is the original SN74LS139ADRE4 discontinued?

A: Product discontinuation at DiGi Electronics does not indicate functional obsolescence. The SN74LS139ADR and SN74LS155ADR remain active products from Texas Instruments with equivalent specifications and continued manufacturing support.