SN74LS126ANS Equivalent & Substitute Parts

Part Overview

The SN74LS126ANS is a non-inverting buffer IC manufactured by Texas Instruments, designed for logic signal buffering applications. This component features 4 elements with 1 bit per element and 3-state output capability, operating within a 4.75V to 5.25V supply voltage range. The part is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent substitute parts is necessary to ensure continued availability and support for designs currently utilizing this component.

Substiute Parts

SN74LS126ANS

Texas InstrumentsIn Stock: 1965SN74LS126ANS Datasheet

Current PartRFQ

SN74LS126ANSR

Texas InstrumentsIn Stock: 4474SN74LS126ANSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LS126ANS is determined by the following critical parameters:

• Logic Function: Buffer, Non-Inverting configuration with 4 elements and 1 bit per element
• Output Architecture: 3-State output capability
• Supply Voltage Range: 4.75V ~ 5.25V compatibility
• Package Specification: 14-SOIC form factor with 0.209" width (5.30mm)
• Mounting Technology: Surface Mount compatibility
• Compliance Standards: ROHS3 compliance and REACH unaffected status

The SN74LS126ANSR qualifies as a direct substitute based on identical logic function, output type, supply voltage range, package form factor, and mounting type. Both parts share the same base product number (74LS126) and maintain equivalent electrical characteristics within specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The SN74LS126ANSR is the manufacturer-recommended substitute for the SN74LS126ANS. Both components maintain identical functional specifications, electrical parameters, and package compatibility. The primary distinction is product status: the SN74LS126ANS is Last Time Buy, while the SN74LS126ANSR is Active. Selection of the SN74LS126ANSR ensures continued long-term availability and supply chain stability. Both parts satisfy ROHS3 compliance and REACH regulatory requirements, making either suitable for applications requiring environmental compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the SN74LS126ANSR directly replace the SN74LS126ANS in existing designs?

A: Yes. Both parts share identical logic function, output type, supply voltage range, and 14-SOIC package specification. No circuit modifications are required for substitution.

Q: What is the primary reason to transition from SN74LS126ANS to SN74LS126ANSR?

A: The SN74LS126ANS carries Last Time Buy status, indicating production discontinuation. The SN74LS126ANSR maintains Active status, ensuring ongoing availability and supply continuity.

Q: Are there differences in output current specifications between these parts?

A: Output current specifications differ between the two parts. The SN74LS126ANS specifies 5.2mA high and 16mA low output current, while the SN74LS126ANSR specifies 2.6mA high and 24mA low output current. Both operate within the same supply voltage and temperature ranges.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74LS126ANS and SN74LS126ANSR are ROHS3 compliant and REACH unaffected, with identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited).

Q: What packaging formats are available for the SN74LS126ANSR?

A: The SN74LS126ANSR is available in Cut Tape (CT) and Digi-Reel packaging formats, as well as Tape & Reel (TR) configuration, providing flexibility for different procurement and assembly requirements.