DM74ALS125M Equivalent & Substitute Parts

Part Overview

The DM74ALS125M is a non-inverting buffer IC manufactured by onsemi, featuring 4 elements with 1 bit per element and 3-state output capability. This component is classified as obsolete, making equivalent substitutes necessary for ongoing design requirements and production continuity. The 14-SOIC surface mount package and logic functionality remain consistent across qualified alternatives.

Substiute Parts

DM74ALS125M

onsemiIn Stock: 691DM74ALS125M Datasheet

Current PartRFQ

SN74LS125ADR

Texas InstrumentsIn Stock: 2614SN74LS125ADR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74ALS125M is based on the following critical parameters that must remain consistent:

• Logic Function: Buffer, Non-Inverting with 4 elements, 1 bit per element
• Output Configuration: 3-State output capability
• Package Compatibility: 14-SOIC surface mount package with identical physical dimensions
• Operating Temperature Range: 0°C ~ 70°C
• Moisture Sensitivity: MSL 1 (Unlimited)

The SN74LS125ADR from Texas Instruments meets all these core requirements, enabling direct functional substitution in circuit designs. Differences in supply voltage range and output current specifications are within acceptable tolerance for standard logic buffer applications.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS125ADR is the qualified substitute for the obsolete DM74ALS125M. Selection is based on:

• Product Status: The SN74LS125ADR maintains active production status, ensuring long-term availability and supply chain continuity.
• Functional Equivalence: Both parts provide identical logic functionality with matching pin configurations and package geometry.
• Compliance: The SN74LS125ADR is ROHS3 compliant, meeting current regulatory requirements. Both parts are REACH Unaffected and classified as EAR99.
• Supply Voltage Compatibility: The SN74LS125ADR supply voltage range (4.75V ~ 5.25V) is a subset of the DM74ALS125M range (4.5V ~ 5.5V), ensuring compatibility in standard 5V logic circuits.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS125ADR directly replace the DM74ALS125M in existing designs?

A: Yes. Both parts share identical logic function, pin configuration, and 14-SOIC package dimensions. No circuit modifications are required for substitution.

Q: What is the difference in output current between these parts?

A: The DM74ALS125M provides 15mA output high current, while the SN74LS125ADR provides 2.6mA. Both maintain 24mA output low current. The SN74LS125ADR is suitable for standard logic-level signal buffering applications.

Q: Are there supply voltage considerations when substituting?

A: The SN74LS125ADR operates within 4.75V ~ 5.25V, which is narrower than the DM74ALS125M range of 4.5V ~ 5.5V. Verify that your circuit operates within the 4.75V ~ 5.25V window for full compatibility.

Q: Is the SN74LS125ADR available in the same package?

A: Yes. Both parts use the 14-SOIC surface mount package with identical 0.154" (3.90mm) width, enabling direct PCB footprint compatibility.

Q: What is the product status difference?

A: The DM74ALS125M is obsolete, while the SN74LS125ADR is in active production. This makes the SN74LS125ADR the recommended choice for new designs and ongoing production requirements.