SN74ALS137ADR Equivalent & Substitute Parts

Part Overview

The SN74ALS137ADR is a Decoder/Demultiplexer logic integrated circuit manufactured by Texas Instruments, featuring a 1 x 3:8 circuit configuration in a 16-SOIC surface mount package. This component is classified as Obsolete, indicating discontinued production and limited availability. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this decoder/demultiplexer function.

Substiute Parts

SN74ALS137ADR

Texas InstrumentsIn Stock: 4398SN74ALS137ADR Datasheet

Current PartRFQ

SN74ALS138ADR

Texas InstrumentsIn Stock: 1934SN74ALS138ADR Datasheet

Parametric EquivalentRFQ

SN74AS138DR

Texas InstrumentsIn Stock: 2024SN74AS138DR Datasheet

Parametric EquivalentRFQ

SN74ALS137AD

Texas InstrumentsIn Stock: 783SN74ALS137AD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ALS137ADR are identified based on strict parametric equivalence across the following critical criteria:

Functional Equivalence: All substitute parts maintain the identical 1 x 3:8 Decoder/Demultiplexer circuit configuration, ensuring pin-compatible functionality.

Electrical Specifications: Substitute parts operate within the same voltage supply range (4.5V ~ 5.5V), output current specifications (400µA high, 8mA low), and temperature operating range (0°C ~ 70°C).

Package Compatibility: All substitute parts utilize the 16-SOIC surface mount package with identical physical dimensions (0.154", 3.90mm Width), ensuring direct PCB layout compatibility.

Compliance Standards: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and identical ECCN and HTSUS classifications.

Substitutes are categorized by product status and series variant to facilitate informed selection based on availability and design requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - SN74ALS138ADR: This part is the preferred substitute, offering parametric equivalence with Active product status and current availability. The 74ALS series maintains identical electrical and thermal characteristics to the SN74ALS137ADR, ensuring direct functional replacement. Available in Cut Tape and Digi-Reel packaging formats with 1900 units in stock.

Secondary Substitute - SN74AS138DR: This part provides parametric equivalence within the 74AS series, a faster logic family variant. Product status is Discontinued at DiGi Electronics, indicating limited future availability. Selection of this substitute should be based on specific design requirements where 74AS series performance characteristics are acceptable and current inventory (2000 units) meets project timelines.

Tertiary Substitute - SN74ALS137AD: This part maintains identical base product number and 74ALS series classification as the main part, with Last Time Buy status indicating final production run. Packaging is supplied in Tube format. Inventory is limited to 719 units. This substitute is suitable for applications requiring exact series matching with acceptance of limited availability.

All substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS138ADR directly replace SN74ALS137ADR?

A: Yes. Both parts share identical electrical specifications, voltage supply range (4.5V ~ 5.5V), output current ratings (400µA, 8mA), operating temperature range (0°C ~ 70°C), and 16-SOIC package dimensions. Functional equivalence is confirmed across all critical parameters.

Q: What is the difference between 74ALS and 74AS series variants?

A: Both series maintain identical electrical specifications for this decoder/demultiplexer function, including voltage supply, output current, and temperature range. The 74AS series represents a faster logic family variant. Selection between series should be based on design requirements and availability status.

Q: Are all substitute parts pin-compatible with the original SN74ALS137ADR?

A: Yes. All substitute parts utilize the 16-SOIC package with identical physical dimensions (0.154", 3.90mm Width) and maintain the same circuit configuration (1 x 3:8 Decoder/Demultiplexer), ensuring direct PCB layout compatibility without redesign.

Q: Which substitute offers the best long-term availability?

A: SN74ALS138ADR carries Active product status with 1900 units in current inventory, indicating ongoing production and supply chain availability. This part is recommended for new designs and applications requiring sustained component supply.

Q: Do all substitutes meet the same compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, ensuring regulatory and trade compliance equivalence.

Q: What packaging options are available for substitute parts?

A: SN74ALS138ADR is available in Cut Tape (CT) and Digi-Reel packaging. SN74ALS137AD is supplied in Tube packaging. SN74AS138DR packaging format is not specified in available data. Selection should align with assembly process requirements and inventory management practices.