74LVC573APW/AUJ Equivalent & Substitute Parts

Part Overview

The 74LVC573APW/AUJ is a D-Type Transparent Latch logic IC manufactured by NXP USA Inc., featuring an 8:8 circuit configuration with tri-state output capability. This component is actively produced and widely used in digital logic applications requiring transparent latch functionality with low-voltage operation. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, ensuring functional compatibility in system designs.

Substiute Parts

74LVC573APW/AUJ

NXP USA Inc.In Stock: 109074LVC573APW/AUJ Datasheet

Current PartRFQ

74LVC373APW-Q100J

Nexperia USA Inc.In Stock: 332774LVC373APW-Q100J Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 74LVC373APW-Q100J qualifies as a parametric equivalent based on the following alignment criteria:

Matching Parameters:

• Logic Type: D-Type Transparent Latch (identical function)
• Circuit Configuration: 8:8 (identical channel count and ratio)
• Output Type: Tri-State (identical output capability)
• Package Type: 20-TSSOP (identical physical form factor)
• Mounting Type: Surface Mount (identical assembly method)
• Output Current: 24mA / 24mA (identical drive capability)
• Operating Temperature: -40°C ~ 125°C (identical thermal range)
• RoHS Status: ROHS3 Compliant (identical environmental compliance)

Allowable Parameter Variations:

• Voltage Supply Range: 74LVC373APW-Q100J operates 1.2V ~ 3.6V (encompasses the 1.65V ~ 3.6V requirement)
• Propagation Delay: 74LVC373APW-Q100J at 3.3ns (meets or exceeds timing specification)

The 74LVC373APW-Q100J is qualified to AEC-Q100 automotive standard, providing additional reliability certification beyond the base requirement.

Parameter Comparison

Engineering Selection Recommendations

74LVC573APW/AUJ is the primary component specification for standard industrial and commercial applications. This part maintains active production status with established supply availability.

74LVC373APW-Q100J serves as a direct functional substitute with enhanced qualification. The AEC-Q100 automotive certification provides additional reliability assurance suitable for automotive-grade applications or systems requiring higher reliability margins. The extended lower voltage limit (1.2V vs. 1.65V) provides broader operational flexibility in low-voltage designs. Propagation delay performance is equivalent or superior.

Both parts satisfy ROHS3 compliance and REACH requirements. Selection between these parts depends on application-specific reliability requirements and supply chain considerations rather than functional capability.

Frequently Asked Questions (FAQ)

Q: Can 74LVC373APW-Q100J directly replace 74LVC573APW/AUJ in existing designs?

A: Yes. Both parts share identical logic function (D-Type Transparent Latch 8:8), output type (Tri-State), package form factor (20-TSSOP), and electrical drive characteristics (24mA output current). Pin-to-pin compatibility is maintained.

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

A: AEC-Q100 is an automotive industry qualification standard. The 74LVC373APW-Q100J meets this standard, indicating enhanced reliability testing and quality assurance. This qualification is beneficial for applications requiring automotive-grade components or higher reliability margins, though not mandatory for standard industrial use.

Q: Are there voltage supply differences that affect circuit design?

A: The 74LVC373APW-Q100J operates across 1.2V ~ 3.6V compared to the main part's 1.65V ~ 3.6V. This wider lower voltage range allows operation in lower-voltage systems. Both parts function identically within the overlapping 1.65V ~ 3.6V range. No circuit redesign is required for standard 3.3V or 5V logic systems.

Q: How do propagation delays compare?

A: The 74LVC373APW-Q100J specifies 3.3ns propagation delay versus 3.4ns for the main part. This represents equivalent or slightly faster performance. Timing-critical applications benefit equally from either part.

Q: Is the 20-TSSOP package identical between both parts?

A: Yes. Both parts use the 20-TSSOP package with 0.173" width and 4.40mm physical dimensions. PCB footprints, assembly processes, and handling requirements are identical.

Q: What compliance certifications apply to both parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The substitute part adds AEC-Q100 automotive qualification. All parts meet industrial environmental and regulatory standards.