SN74LVC573APWRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC573APWRE4 is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is packaged in a 20-TSSOP surface mount package and operates across a supply voltage range of 1.65V to 3.6V with a propagation delay of 2ns. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain functional and electrical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN74LVC573APWRE4
Manufacturer	Texas Instruments
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	2ns
Current - Output High, Low	24mA, 24mA
Operating Temperature	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74LVC573APWRE4 is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount
Independent Circuits: 1
Current - Output High, Low: 24mA, 24mA
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Parameter Variations:

Voltage - Supply: Minimum 1.65V required; higher maximum ratings are acceptable
Delay Time - Propagation: 2ns or faster is acceptable
Operating Temperature: Range of -40°C minimum and 85°C maximum or broader is acceptable
Manufacturer: Different manufacturers permitted if all other parameters align

Substitute parts are grouped into two categories: Parametric Equivalents (identical electrical specifications from Texas Instruments) and Manufacturer Recommended alternatives (functionally equivalent from alternative manufacturers with enhanced or equivalent performance characteristics).

Parameter Comparison

Parameter	SN74LVC573APWRE4	SN74LVC573APWR	SN74LVC573APWRG4	SN74LVC573APWT	74LVC573APW,118	MC74LCX573DTG	MC74LCX573DTR2G
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Nexperia USA Inc.	onsemi	onsemi
Logic Type	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch	D-Type Transparent Latch
Circuit Configuration	8:8	8:8	8:8	8:8	8:8	8:8	8:8
Output Type	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State	Tri-State
Voltage - Supply	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.2V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V
Delay Time - Propagation	2ns	2ns	2ns	2ns	1.5ns	1.5ns	1.5ns
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP	20-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active	Discontinued at DiGi Electronics	Active	Active	Active	Active

Engineering Selection Recommendations

Texas Instruments Parametric Equivalents (SN74LVC573 Series):

SN74LVC573APWR and SN74LVC573APWT are direct parametric equivalents to the SN74LVC573APWRE4, maintaining identical electrical specifications and operating characteristics. Both parts are currently Active in product status, ensuring long-term availability. SN74LVC573APWR is supplied in Cut Tape (CT) & Digi-Reel® packaging with 4795 units in stock, while SN74LVC573APWT is supplied in Tape & Reel (TR) packaging with 1547 units in stock. Selection between these two should be based on procurement and assembly requirements.

Manufacturer Recommended Alternatives:

74LVC573APW,118 (Nexperia USA Inc.) offers enhanced performance characteristics with faster propagation delay (1.5ns versus 2ns) and extended operating temperature range (-40°C to 125°C). This part is Active with 7565 units in stock and provides superior thermal performance for applications requiring extended temperature operation.

MC74LCX573DTG and MC74LCX573DTR2G (onsemi) are functionally equivalent alternatives from the 74LCX series. Both maintain identical circuit configuration, output type, and current specifications. These parts feature faster propagation delay (1.5ns) and extended operating temperature range (-55°C to 125°C), with supply voltage minimum of 2V. MC74LCX573DTG is supplied in Tube packaging (2914 units in stock), while MC74LCX573DTR2G is supplied in Tape & Reel (TR) packaging (3395 units in stock). The onsemi alternatives are suitable for applications requiring enhanced thermal performance and wider temperature operation.

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC573APWR be used as a direct replacement for SN74LVC573APWRE4?

A: Yes. SN74LVC573APWR is a parametric equivalent with identical electrical specifications, logic type, circuit configuration, output type, package, and operating characteristics. The primary difference is product status (Active versus Discontinued) and packaging format (Cut Tape & Digi-Reel® versus the original packaging).

Q: What is the difference between SN74LVC573APWR and SN74LVC573APWT?

A: Both are parametric equivalents with identical electrical specifications. The difference is packaging format: SN74LVC573APWR is supplied in Cut Tape (CT) & Digi-Reel® format, while SN74LVC573APWT is supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements and procurement preferences.

Q: Are the onsemi MC74LCX573 parts compatible with the SN74LVC573APWRE4?

A: MC74LCX573DTG and MC74LCX573DTR2G are functionally equivalent alternatives. They maintain identical logic type, circuit configuration, output type, package, and current specifications. Key differences include faster propagation delay (1.5ns versus 2ns), extended operating temperature range (-55°C to 125°C versus -40°C to 85°C), and minimum supply voltage of 2V versus 1.65V. These parts are suitable for applications where enhanced thermal performance is beneficial.

Q: What does the packaging designation mean (CT, TR, Tube)?

A: CT (Cut Tape) & Digi-Reel® indicates tape-and-reel format with individual component access. TR (Tape & Reel) indicates standard tape-and-reel format for automated assembly. Tube indicates components packaged in plastic tubes. Selection depends on assembly equipment compatibility and procurement requirements.

Q: Can I use 74LVC573APW,118 from Nexperia as a substitute?

A: Yes. 74LVC573APW,118 is a manufacturer-recommended alternative with identical logic type, circuit configuration, output type, package, and current specifications. It offers enhanced performance with faster propagation delay (1.5ns) and extended operating temperature range (-40°C to 125°C). This part is suitable for applications where improved thermal performance is advantageous.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing protocols and environmental regulations.

Q: What is the minimum supply voltage requirement for each substitute?

A: SN74LVC573APWRE4, SN74LVC573APWR, SN74LVC573APWRG4, and SN74LVC573APWT require 1.65V minimum. 74LVC573APW,118 requires 1.2V minimum. MC74LCX573DTG and MC74LCX573DTR2G require 2V minimum. Verify your application's supply voltage against these requirements before selection.

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