PI74ST1G32TEX Equivalent & Substitute Parts

Part Overview

The PI74ST1G32TEX is a single-channel, 2-input OR gate logic IC manufactured by Diodes Incorporated in SOT-23-5 surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across a 1.8V to 3.6V supply voltage range with a maximum propagation delay of 3.8ns at 3.3V with 50pF load.

Substiute Parts

PI74ST1G32TEX

Diodes IncorporatedIn Stock: 767PI74ST1G32TEX Datasheet

Current PartRFQ

SN74AUC1G32DBVR

Texas InstrumentsIn Stock: 4135SN74AUC1G32DBVR Datasheet

MFR RecommendedRFQ

SN74AUC1G32DBVRE4

Texas InstrumentsIn Stock: 1178SN74AUC1G32DBVRE4 Datasheet

MFR RecommendedRFQ

SN74AUC1G32DCKR

Texas InstrumentsIn Stock: 4881SN74AUC1G32DCKR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PI74ST1G32TEX are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain the same logic function (single-channel, 2-input OR gate) and identical circuit count and input configuration.

Package Compatibility: Substitutes are grouped by physical package type. The primary substitutes SN74AUC1G32DBVR and SN74AUC1G32DBVRE4 maintain the SOT-23-5 package footprint, ensuring direct PCB compatibility. The SN74AUC1G32DCKR variant uses SC-70-5 packaging, which requires PCB layout modification.

Electrical Operating Range: All substitutes operate within the original supply voltage specification window and maintain the same operating temperature range (-40°C ~ 85°C).

Compliance & Certification: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring regulatory and environmental compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Direct Replacement): SN74AUC1G32DBVR is the recommended substitute for the PI74ST1G32TEX. This Texas Instruments part maintains identical SOT-23-5 packaging, enabling direct PCB footprint compatibility without layout modifications. The part is currently in active production status with 4120 units in stock, ensuring long-term availability. All compliance certifications (ROHS3, REACH unaffected, MSL 1) are maintained.

Alternative with Same Package: SN74AUC1G32DBVRE4 provides equivalent functionality and packaging but is listed as discontinued at DiGi Electronics. This part should be considered only when SN74AUC1G32DBVR is unavailable, as future procurement may become problematic.

Package Variant Substitute: SN74AUC1G32DCKR offers active product status and high inventory availability (4850 units) but requires PCB redesign due to SC-70-5 packaging. This option is suitable only for new designs or boards undergoing revision where package footprint changes are acceptable.

Electrical Considerations: All Texas Instruments substitutes operate at lower supply voltages (0.8V ~ 2.7V) compared to the original part (1.8V ~ 3.6V). Designs operating at 1.8V or above will function correctly with substitutes. Designs requiring operation below 1.8V cannot use these substitutes. The substitutes also exhibit faster propagation delay (2.1ns vs 3.8ns) and lower output drive current (9mA vs 24mA), which may require circuit verification in high-current or timing-critical applications.

Frequently Asked Questions (FAQ)

Q: Can SN74AUC1G32DBVR be used as a direct replacement for PI74ST1G32TEX without PCB modification?

A: Yes. Both parts use identical SOT-23-5 packaging (SC-74A, SOT-753), allowing direct footprint substitution without PCB layout changes.

Q: What is the key difference between SN74AUC1G32DBVR and SN74AUC1G32DCKR?

A: The primary difference is packaging. SN74AUC1G32DBVR uses SOT-23-5, while SN74AUC1G32DCKR uses SC-70-5. Both provide identical electrical performance but require different PCB footprints. SN74AUC1G32DBVR is preferred for direct replacement applications.

Q: Are the Texas Instruments substitutes compatible with circuits designed for the PI74ST1G32TEX?

A: Functional compatibility is maintained for circuits operating at supply voltages between 1.8V and 2.7V. Circuits requiring operation below 1.8V or above 2.7V are not compatible. Additionally, circuits requiring the higher output drive current (24mA) of the original part may require verification, as substitutes provide only 9mA output drive.

Q: Why is SN74AUC1G32DBVRE4 listed as discontinued?

A: SN74AUC1G32DBVRE4 is discontinued at DiGi Electronics but may remain available through other distributors. For new designs and ongoing procurement, SN74AUC1G32DBVR is the recommended active alternative.

Q: Do all substitute parts maintain the same compliance certifications?

A: Yes. All substitute parts maintain ROHS3 compliance, REACH unaffected status, EAR99 ECCN classification, and MSL 1 moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original part.

Q: What is the impact of faster propagation delay in the substitutes?

A: The substitutes exhibit 2.1ns propagation delay compared to 3.8ns in the original part. This faster performance is generally beneficial and does not create compatibility issues. Circuits designed for the original timing will function correctly with improved speed margins.