SN74HC573APWT Equivalent & Substitute Parts

Part Overview

The SN74HC573APWT 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-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HC573 series provides a standard logic latch function across multiple manufacturers, enabling direct substitution based on electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	2V ~ 6V
Independent Circuits	1
Delay Time - Propagation	23ns
Current Output High/Low	7.8mA / 7.8mA
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	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74HC573APWT is determined by the following critical parameters:

Electrical Compatibility: All substitute parts must maintain the same logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), and voltage supply range (2V ~ 6V). Propagation delay variations are acceptable within the 74HC logic family specifications.

Mechanical Compatibility: All substitute parts must use the identical 20-TSSOP package with 0.173" width and 4.40mm dimensions to ensure PCB footprint compatibility.

Functional Equivalence: Independent circuits (1), output current ratings (7.8mA), and tri-state functionality must remain constant across all substitutes.

Packaging Format: Substitutes are grouped by packaging type (Cut Tape, Tape & Reel, Tube, Bulk) but maintain electrical and mechanical equivalence regardless of distribution format.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Product Status	Propagation Delay (ns)	Operating Temperature (°C)	Packaging	Inventory (Pcs)
SN74HC573APWT	Texas Instruments	Discontinued at DiGi Electronics	23	-40 ~ 85	Cut Tape (CT) & Digi-Reel®	3144
SN74HC573APWR	Texas Instruments	Active	23	-40 ~ 85	Cut Tape (CT) & Digi-Reel®	53400
MC74HC573ADTR2G	onsemi	Active	26	-55 ~ 125	Tape & Reel (TR)	2100
74HC573PW,118	Nexperia USA Inc.	Active	14	-40 ~ 125	Cut Tape (CT) & Digi-Reel®	990400
74HC573PW-Q100,118	Nexperia USA Inc.	Active	14	-40 ~ 125	Tape & Reel (TR)	2814
MC74HC573ADTG	onsemi	Active	26	-55 ~ 125	Tube	1726
MM74HC573MTC	Fairchild Semiconductor	Active	15	-40 ~ 85	Bulk	7229
MM74HC573MTCX	onsemi	Active	15	-40 ~ 85	Tape & Reel (TR)	4000
MM74HC373MTCX	onsemi	Active	19	-40 ~ 85	Cut Tape (CT) & Digi-Reel®	16644

Engineering Selection Recommendations

Direct Parametric Equivalents: SN74HC573APWR (Texas Instruments) is the direct active equivalent with identical electrical specifications and propagation delay (23ns). This part maintains the same operating temperature range (-40°C ~ 85°C) and is available in the same Cut Tape packaging format with significantly higher inventory (53,400 pcs).

Extended Temperature Range Alternatives: MC74HC573ADTR2G and MC74HC573ADTG (onsemi) extend the operating temperature range to -55°C ~ 125°C with slightly increased propagation delay (26ns). These parts are suitable for applications requiring wider temperature operation and are ROHS3 compliant.

Automotive Grade Option: 74HC573PW-Q100,118 (Nexperia USA Inc.) provides AEC-Q100 automotive qualification with the fastest propagation delay (14ns) and extended temperature range (-40°C ~ 125°C). This part is recommended for automotive and high-reliability applications.

Standard Commercial Alternatives: 74HC573PW,118 (Nexperia USA Inc.) offers the fastest propagation delay (14ns) among standard commercial grades with extended temperature range (-40°C ~ 125°C) and the highest inventory availability (990,400 pcs).

Fairchild and onsemi Options: MM74HC573MTC and MM74HC573MTCX provide mid-range propagation delay (15ns) with standard operating temperature range (-40°C ~ 85°C). These parts are suitable for cost-optimized designs with standard performance requirements.

All substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1, and identical electrical functionality (8:8 D-Type Transparent Latch with tri-state output).

Frequently Asked Questions (FAQ)

Q: Can SN74HC573APWR be used as a direct replacement for SN74HC573APWT?

A: Yes. SN74HC573APWR is a direct parametric equivalent with identical logic type, circuit configuration, output type, voltage supply range, propagation delay (23ns), output current, and operating temperature range (-40°C ~ 85°C). Both use the 20-TSSOP package. The primary difference is product status: SN74HC573APWR is active with higher inventory availability.

Q: What is the difference between 74HC573 and 74HC373 variants?

A: Both are D-Type Transparent Latch ICs with 8:8 configuration and tri-state output in 20-TSSOP packages. The primary distinction is the base product number designation. MM74HC373MTCX is listed as a parametric equivalent with 19ns propagation delay and maintains all other electrical and mechanical specifications.

Q: Are onsemi MC74HC573ADTR2G and MC74HC573ADTG interchangeable?

A: Yes, electrically. Both are onsemi 74HC573 variants with identical specifications: 26ns propagation delay, -55°C ~ 125°C operating temperature, and 20-TSSOP package. The difference is packaging format: MC74HC573ADTR2G uses Tape & Reel (TR), while MC74HC573ADTG uses Tube packaging.

Q: Which substitute offers the best performance?

A: 74HC573PW,118 and 74HC573PW-Q100,118 (Nexperia USA Inc.) provide the fastest propagation delay at 14ns. The standard commercial grade (74HC573PW,118) is suitable for general applications, while the automotive grade (74HC573PW-Q100,118) includes AEC-Q100 qualification for automotive and high-reliability applications.

Q: Can I use parts with different operating temperature ranges?

A: Yes, if your application requirements permit. MC74HC573ADTR2G and MC74HC573ADTG support -55°C ~ 125°C, exceeding the original -40°C ~ 85°C range. Verify your system's actual operating temperature requirements before selection.

Q: Are all substitutes ROHS3 compliant?

A: All listed substitutes are ROHS3 compliant except MM74HC573MTC (Fairchild Semiconductor), which does not specify RoHS status in the provided data. Verify compliance requirements for your application before selection.

Q: What packaging options are available?

A: Substitutes are available in Cut Tape (CT) & Digi-Reel®, Tape & Reel (TR), Tube, and Bulk formats. All maintain the identical 20-TSSOP mechanical package. Select based on your procurement and assembly requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message