74ALVC573BQ,115 Equivalent & Substitute Parts

Part Overview

The 74ALVC573BQ,115 is a D-Type Transparent Latch logic IC manufactured by Nexperia USA Inc. in a 20-DHVQFN surface mount package. This component functions as a single-channel 8:8 transparent latch with tri-state output capability, operating across a supply voltage range of 1.65V to 3.6V. The part maintains Active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage - Supply	1.65V ~ 3.6V
Independent Circuits	1
Delay Time - Propagation	2.2ns
Current - Output High, Low	24mA, 24mA
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	20-VFQFN Exposed Pad
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74ALVC573BQ,115 are identified based on strict parametric equivalence across the following critical criteria:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 1.65V ~ 3.6V
Independent Circuits: 1
Output Current Capability: 24mA (High and Low)
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant

The 74ALVC373BQ,115 (Nexperia) and SN74LVC573ARGYR (Texas Instruments) meet these parametric requirements and are classified as direct substitutes. Variations in propagation delay (2.2ns vs. 2ns) and package dimensions remain within acceptable tolerance for equivalent functionality in standard applications.

Parameter Comparison

Parameter	74ALVC573BQ,115	74ALVC373BQ,115	SN74LVC573ARGYR
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Texas Instruments
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State
Voltage - Supply	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V
Independent Circuits	1	1	1
Delay Time - Propagation	2.2ns	2.2ns	2ns
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-VFQFN Exposed Pad	20-VFQFN Exposed Pad	20-VFQFN Exposed Pad
Supplier Device Package	20-DHVQFN (4.5x2.5)	20-DHVQFN (4.5x2.5)	20-VQFN (4.6x4.5)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three parts—74ALVC573BQ,115, 74ALVC373BQ,115, and SN74LVC573ARGYR—maintain Active product status and ROHS3 compliance, qualifying them for equivalent use in applications requiring D-Type Transparent Latch logic with 8:8 configuration and tri-state output.

The 74ALVC373BQ,115 (Nexperia) is a direct parametric equivalent with identical package dimensions (20-DHVQFN 4.5x2.5) and MSL rating (1), making it the primary substitute for the 74ALVC573BQ,115 without PCB layout modifications.

The SN74LVC573ARGYR (Texas Instruments) provides functional equivalence with a different package footprint (20-VQFN 4.6x4.5) and MSL rating (2). This part is suitable for applications where PCB layout can accommodate the alternative package dimensions and where the one-year moisture sensitivity window aligns with manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the 74ALVC373BQ,115 be used as a direct replacement for the 74ALVC573BQ,115?

A: Yes. Both parts share identical parametric specifications including logic type, circuit configuration, output type, supply voltage range, output current capability, operating temperature range, and package classification. The 74ALVC373BQ,115 maintains the same package dimensions and MSL rating, enabling direct substitution without design modifications.

Q: What are the key differences between the Nexperia and Texas Instruments substitutes?

A: The primary differences are package footprint dimensions and moisture sensitivity level. The 74ALVC373BQ,115 uses a 20-DHVQFN package (4.5x2.5mm) with MSL 1, while the SN74LVC573ARGYR uses a 20-VQFN package (4.6x4.5mm) with MSL 2. Propagation delay differs slightly (2.2ns vs. 2ns), but both remain within acceptable performance parameters for standard logic applications.

Q: Are package dimension differences critical for substitution?

A: Package dimension differences require PCB layout evaluation. The 74ALVC373BQ,115 maintains identical footprint compatibility with the original 74ALVC573BQ,115. The SN74LVC573ARGYR requires PCB redesign to accommodate its different package dimensions and should be selected only when layout modifications are feasible.

Q: What does MSL rating mean for part selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before soldering. MSL 1 (Unlimited) allows indefinite storage without special handling. MSL 2 (1 Year) requires controlled storage and handling within one year of manufacture. The 74ALVC573BQ,115 and 74ALVC373BQ,115 offer superior storage flexibility with MSL 1 ratings.

Q: Are all three parts suitable for high-reliability applications?

A: All three parts maintain ROHS3 compliance and REACH Unaffected status, meeting environmental and regulatory requirements. Selection should be based on specific application requirements, supply chain availability, and manufacturing process compatibility with the chosen package type.

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