PI74FCT373ATQE Equivalent & Substitute Parts

Part Overview

The PI74FCT373ATQE is a D-Type Transparent Latch logic IC manufactured by Diodes Incorporated, featuring an 8:8 circuit configuration with tri-state output capability in a 20-QSOP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.75V to 5.25V supply voltage range and is suitable for applications requiring transparent latch functionality with tri-state output control.

Substiute Parts

PI74FCT373ATQE

Diodes IncorporatedIn Stock: 899PI74FCT373ATQE Datasheet

Current PartRFQ

CY74FCT573ATQCT

Cypress Semiconductor CorpIn Stock: 1946CY74FCT573ATQCT Datasheet

DirectRFQ

74FCT373CTPYG

IDT, Integrated Device Technology IncIn Stock: 415474FCT373CTPYG Datasheet

MFR RecommendedRFQ

74FCT373CTQG

IDT, Integrated Device Technology IncIn Stock: 837374FCT373CTQG Datasheet

MFR RecommendedRFQ

CY74FCT373ATQCT

Texas InstrumentsIn Stock: 5232CY74FCT373ATQCT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI74FCT373ATQE is determined by strict equivalence across the following critical parameters: logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), supply voltage range (4.75V ~ 5.25V), operating temperature range (-40°C ~ 85°C), and package compatibility. Substitute parts must maintain identical or superior electrical performance characteristics including propagation delay time, output current ratings, and mounting specifications. The 74FCT series base product number indicates functional compatibility across manufacturers. Package form factor (20-QSOP or 20-SSOP) must be verified for PCB layout compatibility, as physical dimensions vary between suppliers.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status, ensuring long-term availability and manufacturing support. The 74FCT373CTQG and 74FCT373CTPYG from IDT are manufacturer-recommended alternatives with identical package footprints to the original part (20-QSOP and 20-SSOP respectively). The CY74FCT373ATQCT from Texas Instruments and CY74FCT573ATQCT from Cypress Semiconductor provide enhanced output current capability (32mA high, 64mA low) compared to the original specification, offering improved drive capability for demanding applications. All substitutes comply with ROHS3 and REACH requirements where specified. Selection should prioritize package compatibility with existing PCB layouts and verify propagation delay tolerance requirements, as substitute parts specify 2ns versus the original 1.5ns specification.

Frequently Asked Questions (FAQ)

Q: Can the 74FCT373CTPYG replace the PI74FCT373ATQE directly on the PCB? A: The 74FCT373CTPYG is functionally equivalent but uses a 20-SSOP package with 0.209" width versus the original 20-QSOP with 0.154" width. PCB layout verification is required to confirm footprint compatibility.

Q: What is the difference between 74FCT373 and 74FCT573 base product numbers? A: Both are D-Type Transparent Latch 8:8 configurations with tri-state output. The CY74FCT573ATQCT maintains full functional compatibility with the 74FCT373 series for this application.

Q: Are all substitute parts RoHS compliant? A: The CY74FCT373ATQCT and CY74FCT573ATQCT are specified as ROHS3 compliant. Verify RoHS status documentation for 74FCT373CTQG and 74FCT373CTPYG with the respective manufacturers if compliance certification is required.

Q: How does the 2ns propagation delay of substitutes compare to the original 1.5ns specification? A: The 0.5ns increase in propagation delay is within typical logic IC tolerance ranges. Verify timing margins in your application to confirm acceptability.

Q: Which substitute offers the best output current performance? A: The CY74FCT373ATQCT and CY74FCT573ATQCT provide 32mA high and 64mA low output current, exceeding the original 15mA / 64mA specification and offering improved drive capability.