SN74LVC573AQDWREP Equivalent & Substitute Parts

Part Overview

The SN74LVC573AQDWREP is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output in a 20-SOIC package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The SN74LVC573AQDWREP operates across a supply voltage range of 2V to 3.6V with a propagation delay of 1ns and output current capability of 24mA for both high and low states. The device is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	2V ~ 3.6V
Propagation Delay	1ns
Output Current (High/Low)	24mA / 24mA
Operating Temperature	-40°C ~ 125°C
Package Type	20-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SN74LVC573AQDWREP is determined by strict equivalence across the following critical parameters:

Logic type and circuit configuration (D-Type Transparent Latch, 8:8)
Output type (Tri-State)
Package type (20-SOIC)
Supply voltage compatibility (minimum 2V support)
Output current capability (24mA minimum)
Operating temperature range (minimum -40°C to 125°C)
RoHS3 compliance

Substitute parts are grouped into three categories based on their relationship to the main part:

MFR Recommended Substitutes: Parts explicitly recommended by the original manufacturer as direct replacements, maintaining identical or superior electrical specifications.

Parametric Equivalents: Parts meeting all critical electrical and mechanical parameters with identical performance characteristics, including automotive-grade variants with AEC-Q100 qualification.

Direct Equivalents: Parts from alternative manufacturers meeting the same functional and electrical requirements with compatible packaging.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Propagation Delay	Operating Temp	Package	Packaging Type	Inventory
SN74LVC573AQDWREP	Texas Instruments	Obsolete	2V ~ 3.6V	1ns	-40°C ~ 125°C	20-SOIC	Digi-Reel	998 Pcs
SN74LVC573ADWR	Texas Instruments	Active	1.65V ~ 3.6V	2ns	-40°C ~ 85°C	20-SOIC	Cut Tape / Digi-Reel	2400 Pcs
CLVC573AQDWRG4Q1	Texas Instruments	Active	2V ~ 3.6V	1ns	-40°C ~ 125°C	20-SOIC	Tape & Reel	3031 Pcs
SN74LVC573AQDWRQ1	Texas Instruments	Active	2V ~ 3.6V	1ns	-40°C ~ 125°C	20-SOIC	Tape & Reel	1237 Pcs
74LVC573AD,118	Nexperia USA Inc.	Active	1.2V ~ 3.6V	1.5ns	-40°C ~ 125°C	20-SOIC	Cut Tape / Digi-Reel	4578 Pcs
74LVC573AD,112	Nexperia USA Inc.	Obsolete	1.2V ~ 3.6V	1.5ns	-40°C ~ 125°C	20-SOIC	Tube	730 Pcs
MC74LCX573DWG	onsemi	Active	2V ~ 3.6V	1.5ns	-55°C ~ 125°C	20-SOIC	Tube	1608 Pcs
MC74LCX573DWR2G	onsemi	Active	2V ~ 3.6V	1.5ns	-55°C ~ 125°C	20-SOIC	Tape & Reel	2300 Pcs

Engineering Selection Recommendations

Primary Recommendation: CLVC573AQDWRG4Q1 or SN74LVC573AQDWRQ1

Both parts are active Texas Instruments products with automotive-grade qualification (AEC-Q100). They maintain identical electrical specifications to the obsolete SN74LVC573AQDWREP, including 1ns propagation delay and -40°C to 125°C operating range. CLVC573AQDWRG4Q1 is available in higher quantity (3031 Pcs) with Tape & Reel packaging suitable for automated assembly.

Secondary Recommendation: 74LVC573AD,118 (Nexperia)

This active part from Nexperia offers superior voltage supply range (1.2V ~ 3.6V) and maintains the required operating temperature range. With 4578 Pcs in stock, it provides excellent availability. Propagation delay of 1.5ns remains within acceptable performance margins for most applications.

Alternative: MC74LCX573DWR2G (onsemi)

The onsemi variant extends the operating temperature range to -55°C ~ 125°C, beneficial for extreme environment applications. Available in Tape & Reel format with 2300 Pcs in stock. Note the higher moisture sensitivity level (MSL 3) compared to the original part (MSL 1).

Avoid: SN74LVC573ADWR shows reduced operating temperature range (-40°C ~ 85°C) and increased propagation delay (2ns), making it suitable only for applications with relaxed temperature and timing requirements.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVC573ADWR as a direct replacement for SN74LVC573AQDWREP?

A: SN74LVC573ADWR is electrically compatible but with performance trade-offs. It operates at a reduced upper temperature limit of 85°C (versus 125°C) and has 2ns propagation delay (versus 1ns). Use only if your application does not require the full temperature range or faster switching performance.

Q: What is the difference between CLVC573AQDWRG4Q1 and SN74LVC573AQDWRQ1?

A: Both are automotive-grade (AEC-Q100) Texas Instruments parts with identical electrical specifications. CLVC573AQDWRG4Q1 uses the CLVC base product number and is available in higher quantity. SN74LVC573AQDWRQ1 uses the standard SN74LVC base number. Selection depends on your supplier's inventory and packaging preference.

Q: Why does MC74LCX573DWR2G have a different MSL rating?

A: MC74LCX573DWR2G has MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the original part. This indicates stricter moisture handling requirements during storage and assembly. Verify your manufacturing process can accommodate the 168-hour bake-out requirement if moisture exposure occurs.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance profile of the original SN74LVC573AQDWREP.

Q: Which substitute offers the best availability?

A: 74LVC573AD,118 from Nexperia has the highest inventory at 4578 Pcs, followed by CLVC573AQDWRG4Q1 at 3031 Pcs. Both are active products with reliable supply.

Q: Can I mix packaging types in my design?

A: All substitute parts use the same 20-SOIC package footprint, so PCB layout compatibility is maintained. However, verify your assembly process supports the specific packaging format (Tape & Reel, Cut Tape, or Tube) you select.

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