DM74LS125AN Equivalent & Substitute Parts

Part Overview

The DM74LS125AN is a non-inverting buffer IC with 4 elements, 1 bit per element, and 3-state output capability. Manufactured by onsemi in a 14-DIP package, this component is classified as obsolete. Due to its obsolete status and limited availability from the original manufacturer, identifying equivalent substitute parts is essential for design continuity and procurement flexibility. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement without circuit redesign.

Substiute Parts

DM74LS125AN

onsemiIn Stock: 5484DM74LS125AN Datasheet

Current PartRFQ

SN74LS125AN

Texas InstrumentsIn Stock: 2566SN74LS125AN Datasheet

DirectRFQ

SN74LS126AN

onsemiIn Stock: 2455SN74LS126AN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DM74LS125AN are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 4
• Number of Bits per Element: 1
• Output Type: 3-State
• Current - Output High, Low: 2.6mA, 24mA
• Voltage - Supply: 4.75V ~ 5.25V
• Operating Temperature: 0°C ~ 70°C (TA)
• Series: 74LS

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: 14-DIP (0.300", 7.62mm)

All identified substitute parts meet these requirements and are therefore suitable for direct replacement in applications requiring the DM74LS125AN.

Parameter Comparison

Engineering Selection Recommendations

SN74LS125AN (Texas Instruments) is the primary substitute for the DM74LS125AN. This part maintains full electrical and mechanical compatibility while offering the advantage of active product status and ROHS3 compliance. Selection of the Texas Instruments variant is recommended for new designs and applications requiring RoHS compliance.

SN74LS126AN (onsemi) is a parametric equivalent substitute. While electrically and mechanically identical to the DM74LS125AN, this part carries obsolete product status and RoHS non-compliant certification, similar to the original part. This option is suitable only when Texas Instruments sourcing is unavailable and RoHS compliance is not a requirement.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS125AN directly replace the DM74LS125AN without circuit modification?

A: Yes. The SN74LS125AN is a direct replacement. All electrical parameters, output characteristics, supply voltage range, operating temperature range, and mechanical package specifications are identical. No circuit redesign is required.

Q: What is the difference between the SN74LS125AN and SN74LS126AN substitutes?

A: Both parts are electrically and mechanically equivalent to the DM74LS125AN. The primary differences are manufacturer (Texas Instruments vs. onsemi), product status (Active vs. Obsolete), and RoHS compliance (ROHS3 Compliant vs. RoHS non-compliant). Selection depends on procurement availability and compliance requirements.

Q: Are there any package compatibility concerns when substituting these parts?

A: No. All three parts use the 14-DIP (0.300", 7.62mm) through-hole package. Pin configuration and mechanical dimensions are identical, ensuring direct PCB compatibility.

Q: Why is the DM74LS125AN classified as obsolete?

A: Obsolete status indicates the part is no longer in active production by the manufacturer. Substitute parts with active status, such as the SN74LS125AN, are recommended for long-term design continuity.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance relates to material composition and environmental standards, not electrical functionality. Both RoHS-compliant and non-compliant variants perform identically in circuit operation.