SN74HCT573PW Equivalent & Substitute Parts

Part Overview

The SN74HCT573PW is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring 1 channel with 8:8 circuit configuration and tri-state output in a 20-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HCT573 series provides transparent latch functionality suitable for data storage and bus interface applications in digital logic systems.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Supply Voltage Range	4.5V ~ 5.5V
Independent Circuits	1
Propagation Delay	25ns
Output Current (High/Low)	6mA / 6mA
Operating Temperature Range	-40°C ~ 85°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HCT573PW is determined by the following critical parameters:

Mandatory Matching Parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 4.5V ~ 5.5V
Independent Circuits: 1
Package Type: 20-TSSOP
Mounting Type: Surface Mount

Allowable Variation Parameters:

Propagation Delay: Up to 30ns (original: 25ns)
Output Current: Up to 7.2mA (original: 6mA)
Operating Temperature Range: Extended ranges acceptable (-55°C to 125°C)
Product Status: Active preferred over discontinued
Packaging Format: Cut Tape, Tape & Reel, or Digi-Reel acceptable

Substitute parts are grouped by manufacturer and product status. Direct substitutes maintain identical electrical specifications. Upgrade substitutes offer improved performance characteristics (faster propagation delay, extended temperature range) while maintaining functional compatibility. Parametric equivalents share core logic functionality but may originate from different base product lines.

Parameter Comparison

Part Number	Manufacturer	Product Status	Propagation Delay (ns)	Output Current (mA)	Operating Temp (°C)	Packaging	Inventory
SN74HCT573PW	Texas Instruments	Discontinued	25	6 / 6	-40 ~ 85	Tube	2000 Pcs
SN74HCT573PWR	Texas Instruments	Active	25	6 / 6	-40 ~ 85	Cut Tape / Digi-Reel	3678 Pcs
74HCT573PW,118	Nexperia USA Inc.	Active	17	6 / 6	-40 ~ 125	Cut Tape / Digi-Reel	9993 Pcs
74HCT573PW-Q100,11	Nexperia USA Inc.	Active	17	6 / 6	-40 ~ 125	Tape & Reel	1075 Pcs
MC74HCT573ADTR2G	onsemi	Active	30	6 / 6	-55 ~ 125	Tape & Reel	3774 Pcs
MM74HCT573MTCX	onsemi	Active	17	7.2 / 7.2	-40 ~ 85	Cut Tape / Digi-Reel	5238 Pcs
SN74HCT373PW	Texas Instruments	Discontinued	25	6 / 6	-40 ~ 85	Not Specified	1074 Pcs

Engineering Selection Recommendations

Direct Substitutes (Recommended Primary Options):

SN74HCT573PWR from Texas Instruments is the direct active substitute for the discontinued SN74HCT573PW. It maintains identical electrical specifications and operating parameters while offering active product status and improved availability through standard packaging formats (Cut Tape and Digi-Reel).

Upgrade Substitutes (Enhanced Performance):

74HCT573PW,118 from Nexperia USA Inc. and MM74HCT573MTCX from onsemi provide improved propagation delay (17ns versus 25ns) and extended operating temperature ranges (-40°C to 125°C). These parts are suitable for applications requiring faster switching characteristics or operation in wider temperature environments. Both maintain ROHS3 compliance and unlimited moisture sensitivity rating.

74HCT573PW-Q100,11 from Nexperia USA Inc. is qualified to AEC-Q100 automotive standards and is appropriate for automotive and high-reliability applications requiring formal qualification documentation.

Extended Temperature Range Option:

MC74HCT573ADTR2G from onsemi supports the widest operating temperature range (-55°C to 125°C) and is suitable for industrial and extreme environment applications. Propagation delay of 30ns remains within acceptable variation limits.

Parametric Equivalent:

SN74HCT373PW is a parametric equivalent sharing identical electrical characteristics but represents a different base product line (74HCT373 versus 74HCT573). This part is discontinued and should be considered only when existing inventory is available and functional compatibility is confirmed for the specific application.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HCT573PWR as a direct replacement for SN74HCT573PW?

A: Yes. SN74HCT573PWR is the active equivalent from Texas Instruments with identical electrical specifications, supply voltage, propagation delay, output current, and operating temperature range. The only difference is packaging format (Cut Tape/Digi-Reel versus Tube) and active product status.

Q: What is the difference between the Nexperia and onsemi substitutes?

A: Both manufacturers offer 74HCT573 logic ICs with improved propagation delay (17ns) and extended temperature range (-40°C to 125°C) compared to the original part. The Nexperia 74HCT573PW-Q100,11 includes AEC-Q100 automotive qualification. The onsemi MM74HCT573MTCX offers slightly higher output current (7.2mA) and maintains the original -40°C to 85°C temperature range.

Q: Is the MC74HCT573ADTR2G compatible with my application?

A: MC74HCT573ADTR2G is functionally compatible if your application tolerates propagation delay up to 30ns (5ns slower than the original 25ns specification). It is suitable for applications requiring extended temperature operation (-55°C to 125°C) and is available in Tape & Reel packaging.

Q: What does the "Q100,11" designation mean in 74HCT573PW-Q100,11?

A: The Q100,11 designation indicates AEC-Q100 automotive qualification. This part meets automotive industry reliability and quality standards and is appropriate for automotive applications and systems requiring formal qualification documentation.

Q: Can I substitute the SN74HCT373PW for the SN74HCT573PW?

A: SN74HCT373PW is a parametric equivalent with identical electrical characteristics but represents a different base product line. Functional compatibility depends on your specific application requirements. Both parts are currently discontinued, limiting practical availability.

Q: What packaging formats are available for these substitutes?

A: Substitutes are available in three packaging formats: Cut Tape (CT) & Digi-Reel for high-volume applications, Tape & Reel (TR) for automated assembly, and Tube for lower-volume requirements. All maintain the 20-TSSOP package footprint and pin configuration.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), matching the original SN74HCT573PW specifications.

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