74AC573MTCX D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74AC573MTCX is a D-Type Transparent Latch IC manufactured by onsemi, featuring 1 channel with 8:8 circuit configuration and tri-state output capability. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The 20-TSSOP surface mount package provides compact integration for digital logic applications requiring transparent latch functionality with controlled propagation delay and output drive capability.

Substiute Parts

74AC573MTCX

onsemiIn Stock: 842574AC573MTCX Datasheet

Current PartRFQ

MC74AC573DTR2G

onsemiIn Stock: 9632MC74AC573DTR2G Datasheet

DirectRFQ

SN74AC573PWR

Texas InstrumentsIn Stock: 10453SN74AC573PWR Datasheet

DirectRFQ

74AHC573PW,118

Nexperia USA Inc.In Stock: 699274AHC573PW,118 Datasheet

SimilarRFQ

SN74AC573DBR

Texas InstrumentsIn Stock: 3163SN74AC573DBR Datasheet

SimilarRFQ

SN74AC573PW

Texas InstrumentsIn Stock: 1665SN74AC573PW Datasheet

SimilarRFQ

SN74AC373PWR

Texas InstrumentsIn Stock: 50222SN74AC373PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC573MTCX is determined by the following critical parameters:

Functional Equivalence Requirements:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Independent Circuits: 1

Electrical Compatibility Parameters:

• Voltage Supply Range: Must encompass or match 2V ~ 6V
• Current Output High/Low: Must meet or exceed 24mA / 24mA
• Operating Temperature Range: Must cover -40°C ~ 85°C minimum

Physical Compatibility Parameters:

• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP or equivalent footprint

Substitution Categories:

Direct Substitutes maintain identical base product numbers (74AC573) with equivalent electrical and mechanical specifications across different manufacturers or packaging options.

Similar Substitutes use alternative series designations (74AHC573) that provide equivalent functional performance with modified electrical characteristics within acceptable operating parameters.

Parametric Equivalents employ different base product numbers (74AC373) but maintain compatible functional architecture and electrical performance within the application envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MC74AC573DTR2G (onsemi)

This part maintains identical manufacturer lineage with the obsolete 74AC573MTCX, ensuring design continuity. Active product status guarantees long-term availability. ROHS3 compliance and Tape & Reel packaging support production scalability. Propagation delay of 10ns remains within acceptable tolerance relative to the original 8.5ns specification.

Secondary Recommendation: SN74AC573PWR (Texas Instruments)

This direct 74AC573 series substitute from an established logic IC manufacturer provides active product status with superior propagation delay performance (2.5ns). ROHS3 compliance and extensive inventory support high-volume production. Cut Tape & Digi-Reel packaging accommodates various procurement workflows.

Alternative for Extended Temperature Range: 74AHC573PW,118 (Nexperia USA Inc.)

This 74AHC series part extends operating temperature to 125°C, suitable for applications requiring enhanced thermal performance. Active status and ROHS3 compliance are confirmed. Note that output current is reduced to 8mA per channel and supply voltage maximum is 5.5V; verify compatibility with application load requirements and power supply specifications.

Package Variant Consideration: SN74AC573DBR (Texas Instruments)

This part provides identical electrical performance to SN74AC573PWR but in 20-SSOP package (5.30mm width versus 4.40mm TSSOP). Select only if PCB layout accommodates the wider package footprint.

Not Recommended: SN74AC573PW (Texas Instruments)

Although electrically equivalent, this part is discontinued at DiGi Electronics, limiting procurement viability for ongoing production.

Parametric Equivalent: SN74AC373PWR (Texas Instruments)

The 74AC373 base product number indicates a different latch architecture. While functionally compatible as a D-Type Transparent Latch with identical electrical specifications, design verification is required to confirm functional equivalence in the specific application context.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74AC573MTCX with MC74AC573DTR2G without design changes?

A: Yes. Both parts share identical base product number (74AC573), equivalent electrical specifications (2V ~ 6V supply, 24mA output current, -40°C ~ 85°C operating range), and identical 20-TSSOP package. The 10ns propagation delay of MC74AC573DTR2G is within acceptable tolerance of the original 8.5ns specification for most digital logic applications.

Q: What is the difference between 74AC573 and 74AHC573 series?

A: The 74AHC series represents an alternative logic family with different electrical characteristics. The 74AHC573PW,118 provides faster propagation delay (3.9ns) and extended temperature range (-40°C ~ 125°C) but reduced output current (8mA versus 24mA). Substitution is valid only if the application does not require the higher output drive capability of the 74AC series.

Q: Why is SN74AC573DBR listed as a similar substitute if the package is different?

A: SN74AC573DBR maintains identical electrical performance and base product number but uses 20-SSOP package (5.30mm width) instead of 20-TSSOP (4.40mm width). This represents a package variant suitable only if PCB layout can accommodate the wider footprint. Electrical functionality is fully equivalent.

Q: Is the 74AC373 (SN74AC373PWR) truly equivalent to 74AC573?

A: Both are D-Type Transparent Latch ICs with 8:8 configuration and tri-state output. The different base product numbers indicate distinct internal architectures. While electrically compatible within the specified parameter ranges, functional equivalence in the specific application must be verified through design review and testing protocols.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. This certification is mandatory for many industrial and consumer applications. All recommended active substitutes carry ROHS3 compliance except the obsolete 74AC573MTCX.

Q: How do I choose between different packaging options (CT, TR, Tube)?

A: Packaging selection depends on procurement and assembly workflow. Cut Tape (CT) & Digi-Reel supports automated pick-and-place assembly. Tape & Reel (TR) accommodates high-volume production. Tube packaging suits lower-volume or manual assembly processes. Electrical performance is identical across packaging variants of the same part number.

Q: Can I use 74AHC573 if my application requires 24mA output current?

A: No. The 74AHC573PW,118 provides only 8mA output current per channel, insufficient for applications designed for 24mA drive capability. Verify actual load requirements before substitution. If 24mA output is mandatory, select from the 74AC series alternatives (MC74AC573DTR2G, SN74AC573PWR, or SN74AC373PWR).