DM74ALS137MX Equivalent & Substitute Parts

Part Overview

The DM74ALS137MX is a Decoder/Demultiplexer logic IC manufactured by onsemi, featuring a 1 x 3:8 circuit configuration in a 16-SOIC surface mount package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The 74ALS logic family provides standard decoder/demultiplexer functionality suitable for address decoding and signal routing applications in digital systems.

Substiute Parts

DM74ALS137MX

onsemiIn Stock: 761DM74ALS137MX Datasheet

Current PartRFQ

SN74ALS137AD

Texas InstrumentsIn Stock: 783SN74ALS137AD Datasheet

DirectRFQ

SN74ALS138ADR

Texas InstrumentsIn Stock: 1934SN74ALS138ADR Datasheet

Parametric EquivalentRFQ

SN74AS138DR

Texas InstrumentsIn Stock: 2024SN74AS138DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS137MX are qualified based on the following critical parameters that must remain constant:

• Circuit Configuration: 1 x 3:8 decoder/demultiplexer function
• Package Type: 16-SOIC surface mount package (0.154", 3.90mm Width)
• Electrical Specifications: Voltage supply 4.5V ~ 5.5V, output current 400µA (high) and 8mA (low)
• Operating Temperature Range: 0°C ~ 70°C
• Logic Family Compatibility: 74ALS or compatible logic families

The substitute parts listed maintain identical functional specifications and package dimensions, ensuring direct replacement capability in existing PCB designs without layout modifications.

Parameter Comparison

Engineering Selection Recommendations

SN74ALS138ADR (Texas Instruments) is the primary recommended substitute. This part maintains full parametric equivalence with the DM74ALS137MX while offering active product status, ensuring long-term availability and supply chain stability. The SN74ALS138ADR carries ROHS3 compliance and is available in Cut Tape and Digi-Reel packaging formats with substantial inventory levels (1900 pcs).

SN74ALS137AD (Texas Instruments) serves as a direct functional equivalent with identical electrical and mechanical specifications. This part is classified as Last Time Buy, indicating limited future availability. It remains suitable for applications where existing stock levels are adequate.

SN74AS138DR (Texas Instruments) provides parametric equivalence within the 74AS logic family. While this part shares identical functional specifications and package configuration, it is discontinued at DiGi Electronics. Selection of this substitute should be based on specific design requirements and availability verification through alternative distribution channels.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS138ADR directly replace DM74ALS137MX without PCB modifications?

A: Yes. Both parts share identical 16-SOIC package dimensions (0.154", 3.90mm width), pin configuration, and electrical specifications. Direct substitution is possible without layout changes.

Q: What is the difference between 74ALS and 74AS logic families in these substitutes?

A: Both families maintain the same functional decoder/demultiplexer operation and electrical parameters specified for this application. The 74AS variant (SN74AS138DR) represents an alternative logic family option while preserving circuit compatibility.

Q: Why is the DM74ALS137MX classified as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. Texas Instruments equivalents remain in active or last-time-buy status, providing viable alternatives for continued system support.

Q: Are all substitute parts ROHS3 compliant?

A: The Texas Instruments substitutes (SN74ALS137AD, SN74ALS138ADR, SN74AS138DR) are ROHS3 compliant. All listed parts maintain REACH Unaffected status.

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

A: SN74ALS138ADR carries active product status with 1900 pcs in stock, providing the most reliable long-term supply chain position for new designs and production continuity.