74LVC573APW,112 Equivalent & Substitute Parts

Part Overview

The 74LVC573APW,112 is a D-Type Transparent Latch logic IC manufactured by Nexperia USA Inc., featuring an 8:8 circuit configuration with tri-state output in a 20-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The 74LVC573 series provides a single-channel transparent latch function suitable for data storage and bus interface applications. The part operates across a supply voltage range of 1.2V to 3.6V with a propagation delay of 1.5ns and symmetric output current capability of 24mA for both high and low states.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	1.2V ~ 3.6V
Propagation Delay	1.5ns
Output Current (High/Low)	24mA / 24mA
Operating Temperature	-40°C ~ 125°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVC573APW,112 is determined by the following critical parameters:

Logic Function: D-Type Transparent Latch with 8:8 circuit configuration and tri-state output
Package Compatibility: 20-TSSOP surface mount package with identical pin count and pitch
Voltage Supply Range: Minimum 1.2V support required; parts with 2V minimum are acceptable for applications not requiring sub-2V operation
Output Characteristics: 24mA output current capability (both high and low states)
Propagation Delay: Maximum 2ns acceptable; 1.5ns or faster preferred
Operating Temperature Range: Minimum -40°C to 125°C coverage required
Compliance: ROHS3 compliance and MSL Level 1 required

Substitute parts are grouped into two categories based on voltage supply range compatibility and performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Propagation Delay	Operating Temp	Grade	Packaging
74LVC573APW,112	Nexperia USA Inc.	Obsolete	1.2V ~ 3.6V	1.5ns	-40°C ~ 125°C	Standard	Tube
SN74LVC573AQPWRQ1	Texas Instruments	Active	2V ~ 3.6V	1ns	-40°C ~ 125°C	Automotive (AEC-Q100)	Tape & Reel
SN74LVC573AQPWREP	Texas Instruments	Active	2V ~ 3.6V	1ns	-40°C ~ 125°C	Standard	Tape & Reel
CLVC573AQPWRG4Q1	Texas Instruments	Active	2V ~ 3.6V	1ns	-40°C ~ 125°C	Automotive (AEC-Q100)	Tape & Reel
MC74LCX573DTR2G	onsemi	Active	2V ~ 3.6V	1.5ns	-55°C ~ 125°C	Standard	Tape & Reel
MC74LCX573DTG	onsemi	Active	2V ~ 3.6V	1.5ns	-55°C ~ 125°C	Standard	Tube
SN74LVC573APW	Texas Instruments	Active	1.65V ~ 3.6V	2ns	-40°C ~ 85°C	Standard	Tube
SN74LVC573APWR	Texas Instruments	Active	1.65V ~ 3.6V	2ns	-40°C ~ 85°C	Standard	Cut Tape & Digi-Reel
SN74LVC573APWRG4	Texas Instruments	Discontinued at DiGi Electronics	1.65V ~ 3.6V	2ns	-40°C ~ 85°C	Standard	Cut Tape & Digi-Reel
SN74LVC573APWT	Texas Instruments	Active	1.65V ~ 3.6V	2ns	-40°C ~ 85°C	Standard	Tape & Reel

Engineering Selection Recommendations

Primary Substitutes (Full Compatibility)

SN74LVC573AQPWRQ1 and SN74LVC573AQPWREP are the preferred substitutes. Both maintain the 2V to 3.6V supply range, achieve faster propagation delay (1ns), and support the full -40°C to 125°C operating temperature range. SN74LVC573AQPWRQ1 includes automotive-grade qualification (AEC-Q100), suitable for applications requiring automotive compliance. Both parts are in active production status with robust inventory availability.

Secondary Substitutes (Extended Temperature Range)

MC74LCX573DTR2G and MC74LCX573DTG from onsemi provide extended lower operating temperature support (-55°C minimum) while maintaining 1.5ns propagation delay matching the original part. These parts operate within the 2V to 3.6V supply range and are actively produced. Packaging options include both tape & reel and tube formats.

Conditional Substitutes (Reduced Temperature Range)

SN74LVC573APW, SN74LVC573APWR, SN74LVC573APWT, and SN74LVC573APWRG4 are suitable only for applications with maximum operating temperature of 85°C. These parts support lower supply voltage (1.65V minimum) but exhibit 2ns propagation delay. SN74LVC573APWRG4 is discontinued at DiGi Electronics and should be avoided for new designs. The remaining variants are in active production.

Not Recommended

CLVC573AQPWRG4Q1, while automotive-qualified, represents a variant designation that may introduce supply chain complexity without performance advantage over SN74LVC573AQPWRQ1.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC573AQPWRQ1 as a direct replacement for 74LVC573APW,112?

A: Yes. Both parts share identical logic function, circuit configuration, output type, and 20-TSSOP package. SN74LVC573AQPWRQ1 operates within the 2V to 3.6V range (the original supports 1.2V minimum), making it suitable for applications not requiring sub-2V operation. The faster 1ns propagation delay is a performance improvement.

Q: What is the difference between tape & reel and tube packaging?

A: Packaging format affects handling and automation compatibility. Tape & reel packaging is optimized for automated assembly lines, while tube packaging is suitable for manual handling and lower-volume applications. Both formats contain identical components; selection depends on manufacturing process requirements.

Q: Why do some substitutes have different operating temperature ranges?

A: Operating temperature range is determined by the semiconductor manufacturing process and device characterization. MC74LCX573DTR2G and MC74LCX573DTG support -55°C minimum due to onsemi's process technology, while Texas Instruments variants support -40°C minimum. Selection depends on application thermal requirements.

Q: Is the 2ns propagation delay of SN74LVC573APW acceptable as a substitute?

A: The 2ns delay is acceptable only if the original design timing margin accommodates this specification. The original 74LVC573APW,112 specifies 1.5ns; designs with tight timing constraints may require faster variants (1ns) such as SN74LVC573AQPWRQ1 or SN74LVC573AQPWREP.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, matching the original part's environmental and regulatory status.

Q: Which substitute offers the best long-term availability?

A: SN74LVC573AQPWRQ1 and SN74LVC573AQPWREP from Texas Instruments show the highest inventory levels (5877 and 1191 units respectively) and active production status, providing the strongest long-term supply assurance.

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