SN74F126D Equivalent & Substitute Parts

Part Overview

The SN74F126D is a Buffer, Non-Inverting logic IC manufactured by Texas Instruments, featuring 4 elements with 1 bit per element and 3-state output capability in a 14-SOIC surface mount package. This component operates within a 4.5V to 5.5V supply voltage range and is rated for 0°C to 70°C operating temperature.

The SN74F126D carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent and substitute parts to ensure design continuity and procurement availability for new builds and ongoing production requirements.

Substiute Parts

SN74F126D

Texas InstrumentsIn Stock: 3145SN74F126D Datasheet

Current PartRFQ

SN74F126DR

Texas InstrumentsIn Stock: 8915SN74F126DR Datasheet

MFR RecommendedRFQ

SN74BCT125AD

Texas InstrumentsIn Stock: 66112SN74BCT125AD Datasheet

Parametric EquivalentRFQ

SN74F125D

Texas InstrumentsIn Stock: 1912SN74F125D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74F126D are qualified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Critical Matching 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 (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed meet these parameters without exception. Substitutes are categorized by packaging type and product status to facilitate procurement decisions.

Parameter Comparison

Engineering Selection Recommendations

SN74F126DR (MFR Recommended): This part is the direct equivalent of SN74F126D with identical electrical and mechanical specifications. The primary difference is packaging format (Tape & Reel versus Tube) and Active product status from Texas Instruments. Selection of SN74F126DR is appropriate for high-volume production requirements and ensures long-term availability through active manufacturing status.

SN74BCT125AD (Parametric Equivalent): This part meets all critical electrical and mechanical parameters required for substitution. It operates within the same voltage and temperature ranges, maintains identical output current specifications, and uses the same 14-SOIC package. The 74BCT series represents an alternative logic family from Texas Instruments. Highest inventory availability (66080 Pcs) supports procurement flexibility. Product status is Last Time Buy.

SN74F125D (Parametric Equivalent): This part satisfies all substitution criteria with matching electrical characteristics and 14-SOIC packaging. It represents an alternative buffer configuration within the 74F logic family. Product status is Last Time Buy with limited inventory (1900 Pcs).

All substitute parts carry ROHS3 compliance and MSL Level 1 rating, matching the original part's environmental and regulatory qualifications.

Frequently Asked Questions (FAQ)

Q: Can SN74F126DR be used as a direct replacement for SN74F126D?

A: Yes. SN74F126DR is electrically and mechanically identical to SN74F126D. The only difference is packaging format (Tape & Reel versus Tube). Both parts are pin-compatible and functionally equivalent. SN74F126DR carries Active product status, ensuring continued availability.

Q: What is the difference between the 74F and 74BCT logic families?

A: Both families meet the specified electrical parameters for this application. The 74BCT series represents an alternative logic family from Texas Instruments. All critical parameters—output current, supply voltage, operating temperature, and package type—are identical between SN74F126D and SN74BCT125AD.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original SN74F126D specification.

Q: What packaging options are available?

A: SN74F126D, SN74BCT125AD, and SN74F125D are supplied in Tube packaging. SN74F126DR is supplied in Tape & Reel (TR) format. All use identical 14-SOIC (0.154", 3.90mm Width) surface mount packages.

Q: Which substitute part has the best inventory availability?

A: SN74BCT125AD has the highest inventory level at 66080 Pcs. SN74F126DR (Active status) has 8840 Pcs available. SN74F125D has 1900 Pcs available.

Q: Are there any temperature or voltage derating considerations between these parts?

A: No. All parts operate identically within the 4.5V to 5.5V supply voltage range and 0°C to 70°C operating temperature specification. No derating or operational adjustments are required when substituting between these parts.