SN74F126NSR Equivalent & Substitute Parts

Part Overview

The SN74F126NSR is a non-inverting buffer IC manufactured by Texas Instruments, featuring 4 elements with 1 bit per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 14-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

SN74F126NSR

Texas InstrumentsIn Stock: 850SN74F126NSR Datasheet

Current PartRFQ

SN74BCT125ANSR

Texas InstrumentsIn Stock: 2907SN74BCT125ANSR Datasheet

Parametric EquivalentRFQ

SN74F125NSR

Texas InstrumentsIn Stock: 3503SN74F125NSR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74F126NSR are identified based on strict parametric equivalence across the following critical criteria:

Substitution-Determining Parameters:

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 4
• Number of Bits per Element: 1
• Output Type: 3-State
• Current - Output High, Low: 15mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 14-SOIC (0.209", 5.30mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

All identified substitute parts maintain identical electrical specifications and mechanical compatibility with the original SN74F126NSR, ensuring direct functional replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

SN74BCT125ANSR is available in active production status with 2,819 units in stock. This part maintains full parametric equivalence to the SN74F126NSR and carries identical RoHS3 compliance and REACH unaffected status, making it suitable for direct substitution in new designs and legacy system support.

SN74F125NSR is available in active production status with 3,400 units in stock. This part maintains full parametric equivalence to the SN74F126NSR and carries identical RoHS3 compliance and REACH unaffected status. The higher inventory level provides extended availability for high-volume applications.

Both substitute parts are manufactured by Texas Instruments and provide equivalent electrical performance and mechanical compatibility. Selection between SN74BCT125ANSR and SN74F125NSR should be based on inventory availability and supply chain requirements, as both parts are functionally interchangeable with the obsolete SN74F126NSR.

Frequently Asked Questions (FAQ)

Q: Can SN74BCT125ANSR or SN74F125NSR be used as direct replacements for SN74F126NSR?

A: Yes. Both parts maintain identical electrical specifications including output current ratings (15mA, 64mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and 3-state output functionality. Package and mounting specifications are identical, enabling direct PCB-level substitution.

Q: What is the difference between the 74F and 74BCT series designations?

A: The series designation indicates the logic family. Both 74F and 74BCT series maintain the same electrical and mechanical parameters specified for this application. The functional behavior and pin configuration remain identical across both series for this buffer configuration.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts carry identical RoHS3 compliance and REACH unaffected status, ensuring regulatory equivalence for applications subject to environmental and hazardous substance restrictions.

Q: What packaging format is available for these substitute parts?

A: SN74BCT125ANSR is supplied in Tape & Reel (TR) packaging. SN74F125NSR is supplied in Tape & Reel (TR) packaging. Both maintain the 14-SOIC (0.209", 5.30mm Width) case specification required for surface mount assembly.

Q: Which substitute part should be selected for new designs?

A: Either SN74BCT125ANSR or SN74F125NSR is appropriate for new designs. Selection should be based on supply chain availability and inventory levels. SN74F125NSR currently has higher inventory (3,400 units) compared to SN74BCT125ANSR (2,819 units).