SN74HCT125D Equivalent & Substitute Parts

Part Overview

The SN74HCT125D is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 4 elements with 3-state output capability in a 14-SOIC surface mount package. This part is currently discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

SN74HCT125D

Texas InstrumentsIn Stock: 3505SN74HCT125D Datasheet

Current PartRFQ

SN74HCT125DR

Texas InstrumentsIn Stock: 3625SN74HCT125DR Datasheet

DirectRFQ

74HCT125D,653

NXP SemiconductorsIn Stock: 428574HCT125D,653 Datasheet

MFR RecommendedRFQ

74HCT125S14-13

Diodes IncorporatedIn Stock: 2021074HCT125S14-13 Datasheet

MFR RecommendedRFQ

MC74HCT125ADR2G

onsemiIn Stock: 15105MC74HCT125ADR2G Datasheet

MFR RecommendedRFQ

SN74HCT125DE4

Texas InstrumentsIn Stock: 971SN74HCT125DE4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74HCT125D is determined by the following critical parameters: logic type (Buffer, Non-Inverting), number of elements (4), output type (3-State), package type (14-SOIC), and electrical specifications (supply voltage, output current, operating temperature range). All substitute parts listed maintain the same functional architecture and pinout compatibility. Substitutes are grouped by manufacturer and product status to facilitate selection based on availability and supply chain requirements.

Parameter Comparison

Engineering Selection Recommendations

For active production and new designs, SN74HCT125DR (Texas Instruments) is the primary direct substitute, maintaining identical electrical specifications and active product status. The 74HCT125D,653 (NXP Semiconductors) and 74HCT125S14-13 (Diodes Incorporated) are manufacturer-recommended alternatives with extended operating temperature ranges (-40°C ~ 125°C), providing enhanced thermal performance for demanding applications. The MC74HCT125ADR2G (onsemi) offers the widest supply voltage range (2V ~ 6V) and extended temperature range (-55°C ~ 125°C), suitable for applications requiring broader operational margins. All active substitutes maintain ROHS3 compliance and are available in volume quantities. The 74HCT125S14-13 features reduced output current (4mA vs. 6mA), which may require circuit verification in current-limited applications.

Frequently Asked Questions (FAQ)

Q: Can SN74HCT125DR be used as a direct replacement for SN74HCT125D? A: Yes. SN74HCT125DR is a direct substitute with identical electrical specifications, package type, and pinout. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tube) and active product status.

Q: What is the difference between 74HCT125S14-13 and other substitutes? A: The 74HCT125S14-13 has reduced output current specifications (4mA versus 6mA for most alternatives). Applications requiring maximum output current should use alternatives with 6mA ratings. The extended operating temperature range (-40°C ~ 125°C) provides thermal margin advantage.

Q: Is MC74HCT125ADR2G compatible with standard 5V logic circuits? A: Yes. The MC74HCT125ADR2G operates within the 4.5V ~ 5.5V range required for standard 5V logic, with additional capability to operate at lower voltages (2V minimum). The extended temperature range (-55°C ~ 125°C) provides additional operational margin.

Q: Are all substitutes available in the same 14-SOIC package? A: Yes. All listed substitutes use the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: Which substitute should be selected for new designs? A: For new designs, select from active products: SN74HCT125DR (Texas Instruments), 74HCT125D,653 (NXP), 74HCT125S14-13 (Diodes), or MC74HCT125ADR2G (onsemi). Selection should be based on supply chain availability, volume pricing, and thermal requirements of the application.