SN74F126DR Equivalent & Substitute Parts

Part Overview

The SN74F126DR is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments. This 14-SOIC surface mount device provides 4 elements of 1-bit buffering with 3-state output capability, operating across a 4.5V to 5.5V supply voltage range. The device is classified as Active product status and maintains full RoHS3 compliance. Equivalent and substitute parts are identified when identical electrical performance and mechanical compatibility are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

SN74F126DR

Texas InstrumentsIn Stock: 8915SN74F126DR Datasheet

Current PartRFQ

SN74BCT125ADR

Texas InstrumentsIn Stock: 1068SN74BCT125ADR Datasheet

Parametric EquivalentRFQ

SN74F125DR

Texas InstrumentsIn Stock: 12577SN74F125DR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74F126DR is determined by strict equivalence across the following critical parameters:

• Logic function: Non-inverting buffer with 4 elements, 1 bit per element
• Output configuration: 3-state output capability
• Electrical performance: 15mA output high current, 64mA output low current
• Supply voltage range: 4.5V to 5.5V
• Operating temperature range: 0°C to 70°C
• Package specification: 14-SOIC surface mount form factor
• Compliance certifications: RoHS3 compliance and MSL Level 1

Substitute parts identified below meet all these parameters while differing only in internal logic series designation (74F versus 74BCT). Both series maintain identical pinout, electrical characteristics, and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SN74F126DR, SN74F125DR, and SN74BCT125ADR—are classified as Active products with full RoHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and inventory levels rather than electrical or mechanical differentiation. The SN74F125DR offers the highest inventory availability at 12,519 pieces, followed by the SN74F126DR at 8,840 pieces, and the SN74BCT125ADR at 1,025 pieces. All parts satisfy identical compliance and certification requirements for deployment in equivalent applications.

Frequently Asked Questions (FAQ)

Q: Can SN74F125DR be used as a direct replacement for SN74F126DR?

A: Yes. Both parts share identical logic function, electrical performance, supply voltage range, operating temperature specifications, and 14-SOIC package form factor. The parts differ only in internal series designation (74F versus 74F) and are pin-compatible substitutes.

Q: What is the difference between the 74F and 74BCT series in these buffers?

A: The SN74F126DR and SN74F125DR belong to the 74F series, while the SN74BCT125ADR belongs to the 74BCT series. Despite series differences, all three parts deliver identical electrical characteristics, output current ratings, supply voltage range, and operating temperature specifications required for this application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SN74F126DR, SN74F125DR, and SN74BCT125ADR are all RoHS3 compliant with MSL Level 1 rating and REACH unaffected status.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All three parts use the 14-SOIC surface mount package with identical pinout and mechanical dimensions (0.154" width, 3.90mm). They are mechanically and electrically interchangeable without PCB redesign.

Q: What output current specifications apply to all substitute parts?

A: All parts provide 15mA output high current and 64mA output low current across the 4.5V to 5.5V supply voltage range and 0°C to 70°C operating temperature range.