SN74HC573ADW Equivalent & Substitute Parts

Part Overview

The SN74HC573ADW 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 discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a 2V to 6V supply voltage range with a propagation delay of 23ns and is RoHS3 compliant with MSL-1 moisture sensitivity rating.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Supply Voltage Range	2V ~ 6V
Propagation Delay	23ns
Output Current (High/Low)	7.8mA / 7.8mA
Operating Temperature	-40°C ~ 85°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 SN74HC573ADW is determined by strict equivalence across the following critical parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Supply Voltage Range: 2V ~ 6V
Package Type: 20-SOIC
Output Current Capability: 7.8mA (High and Low)
RoHS3 Compliance

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents: Parts from Texas Instruments with identical electrical specifications and packaging, differing only in packaging format (tape, reel, or tube).

Parametric Equivalents: Parts from alternative manufacturers (Nexperia, onsemi, Fairchild) that meet all critical electrical parameters and package requirements, though may have variations in propagation delay or operating temperature range.

Base Product Variants: Parts sharing the same base product number (74HC573) but with different suffixes indicating packaging or qualification differences.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Circuit	Output Type	Supply Voltage	Propagation Delay (ns)	Operating Temp (°C)	Package	Product Status
SN74HC573ADW	Texas Instruments	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	23	-40 ~ 85	20-SOIC	Discontinued
SN74HC573ADWR	Texas Instruments	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	23	-40 ~ 85	20-SOIC	Active
SN74HC563DW	Texas Instruments	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	23	-40 ~ 85	20-SOIC	Discontinued
74HC573D,653	Nexperia USA Inc.	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	14	-40 ~ 125	20-SOIC	Active
74HC573D-Q100,118	Nexperia USA Inc.	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	14	-40 ~ 125	20-SOIC	Active
MC74HC573ADWG	onsemi	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	26	-55 ~ 125	20-SOIC	Active
MC74HC573ADWR2G	onsemi	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	26	-55 ~ 125	20-SOIC	Active
MM74HC573WM	onsemi	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	15	-40 ~ 85	20-SOIC	Active
MM74HC573WMX	onsemi	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	15	-40 ~ 85	20-SOIC	Active
MM74HC373WM	Fairchild Semiconductor	D-Type Transparent Latch	8:8	Tri-State	2V ~ 6V	19	-40 ~ 85	20-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: SN74HC573ADWR (Texas Instruments) is the direct active equivalent with identical electrical specifications and packaging to the discontinued SN74HC573ADW. This part maintains full compatibility with existing designs and is currently in active production status.

Extended Temperature Range Applications: 74HC573D,653 (Nexperia) and MC74HC573ADWG (onsemi) both support operating temperatures to 125°C, compared to the original 85°C maximum. These parts are suitable for applications requiring extended thermal performance while maintaining all core electrical parameters.

Automotive Grade Option: 74HC573D-Q100,118 (Nexperia) includes AEC-Q100 automotive qualification and extended temperature range (-40°C to 125°C), appropriate for automotive and harsh environment applications.

Alternative Manufacturers: MM74HC573WM and MM74HC573WMX (onsemi) offer faster propagation delay (15ns versus 23ns) with identical operating temperature range, providing performance headroom for timing-critical applications. MC74HC573ADWR2G (onsemi) offers the same specifications as MC74HC573ADWG with alternative packaging format.

All recommended substitutes maintain RoHS3 compliance and tri-state output capability required for the original design.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74HC573ADW with SN74HC573ADWR?

A: Yes. SN74HC573ADWR is the active production equivalent with identical electrical specifications, supply voltage range, propagation delay, output current, and 20-SOIC packaging. The only difference is packaging format (Digi-Reel versus tube).

Q: What is the difference between the 74HC573 and 74HC563 variants?

A: Both are D-Type Transparent Latches with 8:8 configuration and tri-state output in 20-SOIC packaging. SN74HC563DW is listed as a parametric equivalent with identical electrical specifications to SN74HC573ADW. Functional differences between base product numbers 74HC573 and 74HC563 are not specified in the provided parameters.

Q: Are Nexperia 74HC573D,653 and onsemi MC74HC573ADWG direct substitutes?

A: Both are functional substitutes meeting all core electrical parameters (2V-6V supply, 8:8 configuration, tri-state output, 7.8mA output current, 20-SOIC package). However, they differ in propagation delay (14ns versus 26ns) and operating temperature range (-40 to 125°C versus -40 to 85°C). Verify timing requirements before substitution.

Q: What does the automotive qualification (AEC-Q100) on 74HC573D-Q100,118 mean?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This variant is suitable for automotive applications and harsh environments requiring extended temperature operation (-40°C to 125°C).

Q: Can I use MM74HC573WM or MM74HC573WMX for faster timing performance?

A: Yes, both parts offer 15ns propagation delay compared to the original 23ns, providing timing margin. They maintain identical supply voltage range (2V-6V), output current (7.8mA), and operating temperature (-40 to 85°C). Verify that faster timing does not introduce timing violations in your circuit.

Q: What is the difference between MM74HC573WM and MM74HC573WMX?

A: Both parts are identical in electrical specifications and performance. The difference is packaging format: MM74HC573WM is supplied in tube packaging, while MM74HC573WMX is supplied in cut tape with Digi-Reel format.

Q: Is MM74HC373WM a suitable substitute?

A: MM74HC373WM meets all core electrical parameters (2V-6V supply, 8:8 configuration, tri-state output, 7.8mA current, 20-SOIC package, -40 to 85°C operation). It is a parametric equivalent with 19ns propagation delay. Verify functional compatibility with your specific application requirements.

Q: What is the moisture sensitivity level difference between parts?

A: SN74HC573ADW has MSL-1 (unlimited moisture sensitivity protection), while onsemi parts (MC74HC573ADWG, MC74HC573ADWR2G, MM74HC573WM, MM74HC573WMX) have MSL-3 (168 hours). MSL-3 requires controlled storage and handling to prevent moisture absorption. Verify storage and assembly process compatibility.

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