PI74LPT573AS Equivalent & Substitute Parts

Part Overview

The PI74LPT573AS is a D-Type Transparent Latch logic IC manufactured by Diodes Incorporated, featuring an 8:8 channel configuration with tri-state output capability in a 20-SOIC surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates within a 2.7V to 3.6V supply voltage range with a propagation delay of 1.5ns and supports output currents of 24mA in both high and low states.

Substiute Parts

PI74LPT573AS

Diodes IncorporatedIn Stock: 1054PI74LPT573AS Datasheet

Current PartRFQ

CLVC573AQDWRG4Q1

Texas InstrumentsIn Stock: 3043CLVC573AQDWRG4Q1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI74LPT573AS is determined by strict equivalence across the following critical parameters:

• Logic function: D-Type Transparent Latch with 8:8 channel configuration
• Output architecture: Tri-state capability
• Package form factor: 20-SOIC surface mount package
• Electrical compatibility: Supply voltage range must encompass or match the original specification
• Output drive capability: Current ratings of 24mA minimum for both high and low states
• Propagation delay: Must meet or exceed timing performance

The CLVC573AQDWRG4Q1 from Texas Instruments satisfies all substitution criteria. This part maintains identical logic function, circuit configuration, output type, and physical package specifications. The supply voltage range of 2V to 3.6V encompasses the original 2.7V to 3.6V specification, ensuring full compatibility. Propagation delay of 1ns exceeds the original 1.5ns specification, providing improved timing performance.

Parameter Comparison

Engineering Selection Recommendations

The CLVC573AQDWRG4Q1 is the qualified substitute for the PI74LPT573AS based on the following factors:

The original part is classified as obsolete, creating supply chain risk. The substitute maintains active product status with 3031 units in stock, ensuring availability for production and support applications.

The substitute meets all electrical and functional requirements. Supply voltage compatibility is confirmed with the 2V to 3.6V range encompassing the original specification. Propagation delay performance is improved at 1ns versus the original 1.5ns. Output current specifications remain identical at 24mA for both high and low states.

The substitute carries ROHS3 compliance and AEC-Q100 automotive qualification, providing enhanced regulatory alignment compared to the non-compliant original part. Both components share identical package specifications (20-SOIC) and mounting methodology, enabling direct board-level substitution without layout modification.

The extended operating temperature range of -40°C to 125°C in the substitute provides additional thermal margin beyond the original -40°C to 85°C specification.

Frequently Asked Questions (FAQ)

Q: Can the CLVC573AQDWRG4Q1 be used as a direct replacement for the PI74LPT573AS?

A: Yes. Both parts share identical logic function (D-Type Transparent Latch 8:8), output type (tri-state), and physical package (20-SOIC). Electrical parameters are compatible, with the substitute offering improved propagation delay and extended temperature range.

Q: What are the key differences between these parts?

A: The primary differences are product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), and operating temperature range (-40°C to 85°C versus -40°C to 125°C). The substitute provides faster propagation delay at 1ns compared to 1.5ns.

Q: Are there any supply voltage compatibility concerns?

A: No. The substitute supply voltage range of 2V to 3.6V fully encompasses the original specification of 2.7V to 3.6V, ensuring operation across all original design conditions.

Q: Does the package form factor remain identical?

A: Yes. Both parts use the 20-SOIC package with 0.295" width (7.50mm). No PCB layout changes are required for substitution.

Q: What is the significance of AEC-Q100 qualification on the substitute?

A: AEC-Q100 qualification indicates the substitute meets automotive-grade reliability and testing standards. This provides additional assurance for applications requiring enhanced quality and traceability, though it is not a requirement for general-purpose substitution.

Q: Can the improved propagation delay of the substitute cause timing issues?

A: No. Faster propagation delay (1ns versus 1.5ns) improves timing performance and does not create compatibility issues in designs originally specified for the slower part.