PI74ST1G125TEX Equivalent & Substitute Parts

Part Overview

The PI74ST1G125TEX is a non-inverting buffer logic IC manufactured by Diodes Incorporated, designed for 3.6V operation in a SOT-23-5 surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part provides a single buffer element with 3-state output capability, suitable for signal conditioning and bus interface applications.

Substiute Parts

PI74ST1G125TEX

Diodes IncorporatedIn Stock: 916PI74ST1G125TEX Datasheet

Current PartRFQ

TC7SZ125F,LJ(CT

Toshiba Semiconductor and StorageIn Stock: 37983TC7SZ125F,LJ(CT Datasheet

DirectRFQ

SN74AUC1G125DBVR

Texas InstrumentsIn Stock: 56860SN74AUC1G125DBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PI74ST1G125TEX are qualified based on the following criteria:

• Functional equivalence: Buffer, non-inverting logic with 3-state output
• Package compatibility: SC-74A / SOT-753 surface mount package
• Electrical compatibility: Supply voltage range overlap with the original part (minimum 1.8V requirement)
• Output drive capability: Current output specifications suitable for the application
• Operating temperature range: -40°C ~ 85°C
• Compliance standards: ROHS3 compliance and REACH unaffected status

The substitute parts listed below meet these criteria and are available as active products from their respective manufacturers.

Parameter Comparison

Engineering Selection Recommendations

TC7SZ125F,LJ(CT (Toshiba Semiconductor and Storage) is suitable for applications requiring extended supply voltage range up to 5.5V with higher output drive current (32mA). This part is actively manufactured and maintains full ROHS3 compliance. The broader voltage specification provides design flexibility for mixed-voltage systems while maintaining compatibility with the original 1.8V ~ 3.6V operating window.

SN74AUC1G125DBVR (Texas Instruments) is recommended for low-power applications where reduced output current (9mA) is acceptable. This part operates within a narrower supply voltage range (0.8V ~ 2.7V) and is actively produced with ROHS3 compliance. Selection of this part requires verification that the application supply voltage does not exceed 2.7V.

Both substitute parts share identical package geometry, pin configuration, and functional characteristics with the obsolete PI74ST1G125TEX, enabling direct replacement in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can TC7SZ125F,LJ(CT replace PI74ST1G125TEX in all applications?

A: TC7SZ125F,LJ(CT is functionally equivalent and package-compatible. The extended voltage range (1.8V ~ 5.5V) encompasses the original part's specification (1.8V ~ 3.6V). Higher output current (32mA vs. 24mA) provides additional drive capability. Compatibility depends on the specific application's voltage and current requirements.

Q: What are the limitations of SN74AUC1G125DBVR as a substitute?

A: SN74AUC1G125DBVR operates within a narrower supply voltage range (0.8V ~ 2.7V), which does not fully overlap with the original part's 3.6V maximum specification. This part is suitable only for applications operating at 2.7V or below. Output current is reduced to 9mA, which may limit drive capability in high-impedance load scenarios.

Q: Are all substitute parts in the same package?

A: Yes. All listed parts use SC-74A / SOT-753 surface mount packaging, enabling direct PCB footprint compatibility without layout modifications.

Q: Do substitute parts maintain compliance certifications?

A: Both substitute parts are ROHS3 compliant and REACH unaffected, matching the original part's regulatory status. All parts are suitable for applications requiring environmental compliance.

Q: What is the primary reason for substitution?

A: The PI74ST1G125TEX is classified as obsolete. Active substitute parts ensure long-term supply availability and support for new production runs and design revisions.