DM74LS126AN Equivalent & Substitute Parts

Part Overview

The DM74LS126AN is a non-inverting buffer IC with 4 elements, 1 bit per element, designed for logic-level signal buffering applications. Manufactured by onsemi in a 14-DIP through-hole package, this component operates within a 4.75V to 5.25V supply voltage range and a 0°C to 70°C temperature range. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and legacy design support.

Substiute Parts

DM74LS126AN

onsemiIn Stock: 3457DM74LS126AN Datasheet

Current PartRFQ

SN74LS126AN

onsemiIn Stock: 2455SN74LS126AN Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DM74LS126AN is determined by strict alignment of the following electrical and mechanical parameters:

• Logic Function: Buffer, Non-Inverting with 4 elements, 1 bit per element
• Output Characteristics: Current drive capability (2.6mA high, 24mA low)
• Supply Voltage Range: 4.75V ~ 5.25V
• Operating Temperature Range: 0°C ~ 70°C
• Package Type: 14-DIP through-hole configuration
• Series Classification: 74LS logic family

The SN74LS126AN meets all these criteria. Both parts share identical logic function, element count, bit configuration, output current specifications, supply voltage range, operating temperature range, and physical package dimensions. The primary distinction is the output type designation (standard output vs. 3-State output) and packaging format (14-MDIP vs. 14-PDIP), which do not affect functional substitution within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

Both the DM74LS126AN and SN74LS126AN are classified as obsolete products. Selection between these parts should be based on availability and compliance requirements specific to your application.

The DM74LS126AN carries REACH Unaffected status and EAR99 export classification. The SN74LS126AN is RoHS non-compliant, which may impact suitability for applications subject to RoHS directives or customer compliance requirements.

For new designs or systems requiring RoHS compliance, alternative modern buffer IC solutions outside the 74LS family should be evaluated. For legacy system maintenance and repair where the 74LS series is already established, either part provides functional equivalence within the specified electrical and mechanical parameters.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS126AN directly replace the DM74LS126AN in my circuit?

A: Yes, within the specified electrical and mechanical parameters. Both parts are 4-element, non-inverting buffers with identical output current ratings, supply voltage range, operating temperature range, and 14-DIP package dimensions. Pin configuration and functional behavior are equivalent.

Q: What is the difference between the DM74LS126AN and SN74LS126AN?

A: The primary differences are packaging format (14-MDIP vs. 14-PDIP) and output type designation. The DM74LS126AN is specified with standard output, while the SN74LS126AN is specified with 3-State output. Both parts maintain identical electrical performance within the 74LS series specifications. The SN74LS126AN is RoHS non-compliant, whereas the DM74LS126AN carries REACH Unaffected status.

Q: Are these parts still in production?

A: No. Both the DM74LS126AN and SN74LS126AN are classified as obsolete. Inventory availability is limited to existing stock. For new designs, modern buffer IC alternatives should be considered.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by matching logic function (non-inverting buffer), element count (4), bits per element (1), output current specifications (2.6mA high, 24mA low), supply voltage range (4.75V ~ 5.25V), operating temperature range (0°C ~ 70°C), and physical package type (14-DIP through-hole).

Q: Does the 3-State output designation on the SN74LS126AN affect compatibility?

A: The output type designation reflects datasheet documentation conventions. Both parts operate within identical electrical parameters and 14-DIP package specifications. Functional substitution is valid within the specified parameter constraints.

Q: What compliance considerations apply to these parts?

A: The DM74LS126AN is REACH Unaffected and EAR99 classified. The SN74LS126AN is RoHS non-compliant. Applications subject to RoHS directives or customer compliance requirements should account for these designations in component selection.