74VHC573MTCX Equivalent & Substitute Parts

Part Overview

The 74VHC573MTCX is a D-Type Transparent Latch logic IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component operates across a 2V to 5.5V supply voltage range with a propagation delay of 4.5ns and is housed in a 20-TSSOP surface mount package. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity level rating.

Substitute parts are necessary when the original 74VHC573MTCX becomes unavailable due to supply constraints, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible logic families with enhanced performance characteristics.

Key Parameters

Parameter	Value
Logic Type	D-Type Transparent Latch
Circuit Configuration	8:8
Output Type	Tri-State
Voltage Supply Range	2V ~ 5.5V
Independent Circuits	1
Propagation Delay	4.5ns
Output Current (High/Low)	8mA / 8mA
Operating Temperature	-40°C ~ 85°C
Package Type	20-TSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 74VHC573MTCX is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Logic Type: D-Type Transparent Latch
Circuit Configuration: 8:8
Output Type: Tri-State
Voltage Supply Range: 2V ~ 5.5V (minimum requirement)
Independent Circuits: 1
Output Current: 8mA minimum (both high and low)
Operating Temperature: -40°C minimum to 85°C minimum
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Package Considerations:

Primary substitutes maintain 20-TSSOP package compatibility
SN74AHC573DBR uses 20-SSOP package (0.209" width vs. 0.173" width) and is classified as similar due to package dimensional difference

Performance Variations: Substitute parts may exhibit different propagation delays (ranging from 1ns to 5ns) and alternative packaging formats (Cut Tape, Tape & Reel, Tube). These variations do not affect functional substitution when electrical parameters remain within specification.

Parameter Comparison

Part Number	Manufacturer	Series	Propagation Delay	Package	Packaging Format	Operating Temp	Product Status
74VHC573MTCX	onsemi	74VHC	4.5ns	20-TSSOP	Cut Tape & Digi-Reel	-40°C ~ 85°C	Active
MC74VHC573DTR2G	onsemi	74VHC	5ns	20-TSSOP	Tape & Reel	-40°C ~ 85°C	Active
SN74AHC573DGVR	Texas Instruments	74AHC	1ns	20-TFSOP	Tape & Reel	-40°C ~ 85°C	Active
SN74AHC573PW	Texas Instruments	74AHC	1ns	20-TSSOP	Tube	-40°C ~ 85°C	Discontinued at DiGi Electronics
SN74AHC573PWR	Texas Instruments	74AHC	1ns	20-TSSOP	Cut Tape & Digi-Reel	-40°C ~ 85°C	Active
SN74AHC573PWRG4	Texas Instruments	74AHC	1ns	20-TSSOP	Not Specified	-40°C ~ 85°C	Discontinued at DiGi Electronics
74AHC573PW,118	Nexperia USA Inc.	74AHC	3.9ns	20-TSSOP	Cut Tape & Digi-Reel	-40°C ~ 125°C	Active
SN74AHC573QPWRG4Q1	Texas Instruments	74AHC	1ns	20-TSSOP	Tape & Reel	-40°C ~ 85°C	Active (Automotive)
SN74AHC573QPWRQ1	Texas Instruments	74AHC	1ns	20-TSSOP	Tape & Reel	-40°C ~ 85°C	Active (Automotive)
SN74AHC573DBR	Texas Instruments	74AHC	1ns	20-SSOP	Tape & Reel	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical and Package Specifications):

MC74VHC573DTR2G (onsemi) maintains full electrical compatibility with the 74VHC573MTCX within the same 74VHC series. The primary difference is packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) and a marginal propagation delay increase of 0.5ns, which remains within acceptable logic timing parameters. Both parts are active in production status.

SN74AHC573PWR (Texas Instruments) provides direct substitution with identical 20-TSSOP package and Cut Tape & Digi-Reel format. The 74AHC series exhibits superior propagation delay performance (1ns vs. 4.5ns), representing an upgrade path with no functional compromise. This part is currently active.

Packaging Format Alternatives:

SN74AHC573PW (Texas Instruments) offers identical electrical specifications in Tube packaging format. Product status is discontinued at DiGi Electronics, limiting availability for new procurement.

SN74AHC573DGVR (Texas Instruments) uses 20-TFSOP package (0.173" width, matching the 74VHC573MTCX) with superior 1ns propagation delay. This variant is suitable when Tape & Reel format is required.

Extended Temperature Range Option:

74AHC573PW,118 (Nexperia USA Inc.) extends the operating temperature range to -40°C ~ 125°C while maintaining 20-TSSOP package compatibility. This part is active and suitable for applications requiring enhanced thermal performance.

Automotive Grade Alternatives:

SN74AHC573QPWRG4Q1 and SN74AHC573QPWRQ1 (Texas Instruments) are AEC-Q100 qualified automotive-grade variants with identical electrical specifications. These parts are active and appropriate for automotive applications requiring qualification compliance.

Package Variant:

SN74AHC573DBR (Texas Instruments) uses 20-SSOP package with 0.209" width, representing a dimensional difference from the standard 0.173" TSSOP package. This part is suitable only when PCB layout accommodates the wider package footprint.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 74VHC573MTCX with any of the listed parts without design changes?

A: Direct substitution without PCB layout modifications is possible with MC74VHC573DTR2G and SN74AHC573PWR, as both maintain identical 20-TSSOP package dimensions and electrical specifications. SN74AHC573DBR requires PCB footprint adjustment due to its 20-SSOP package width of 0.209" versus the standard 0.173" TSSOP width.

Q: What is the difference between the 74VHC and 74AHC series?

A: Both series are D-Type Transparent Latch logic families with identical functional specifications. The 74AHC series demonstrates faster propagation delay (1ns) compared to the 74VHC series (4.5ns). Both operate within the 2V to 5.5V supply voltage range and maintain tri-state output capability.

Q: Are there inventory considerations when selecting a substitute?

A: Inventory levels vary by part number and supplier. MC74VHC573DTR2G has 5814 units available, while SN74AHC573PWR has 4200 units. Parts marked as discontinued at DiGi Electronics may have limited availability through alternative distribution channels.

Q: What packaging formats are available?

A: Available formats include Cut Tape & Digi-Reel (standard reel packaging), Tape & Reel (continuous reel format), and Tube (individual component packaging). Selection depends on manufacturing process requirements and volume specifications.

Q: Can I use the automotive-grade variants in non-automotive applications?

A: Yes. SN74AHC573QPWRG4Q1 and SN74AHC573QPWRQ1 are AEC-Q100 qualified but functionally identical to standard variants. These parts are suitable for any application within their specified electrical and temperature parameters.

Q: What is the impact of propagation delay differences on circuit performance?

A: Propagation delay variations (1ns to 5ns) affect signal timing in high-speed logic circuits. Faster variants (1ns) provide timing margin improvements, while slower variants (4.5ns to 5ns) remain compatible with standard logic timing requirements. Design timing analysis determines acceptable delay ranges.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, meeting environmental and regulatory requirements for electronic component manufacturing and distribution.

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