74ACTQ573SCX D-Type Transparent Latch Equivalent & Substitute Parts

Part Overview

The 74ACTQ573SCX 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, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

Substiute Parts

74ACTQ573SCX

onsemiIn Stock: 316374ACTQ573SCX Datasheet

Current PartRFQ

MC74ACT573DWG

onsemiIn Stock: 1184MC74ACT573DWG Datasheet

SimilarRFQ

MC74ACT573DWR2G

onsemiIn Stock: 2225MC74ACT573DWR2G Datasheet

SimilarRFQ

CD74ACT573M

Harris CorporationIn Stock: 2217CD74ACT573M Datasheet

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CD74ACT573M96

Harris CorporationIn Stock: 1927CD74ACT573M96 Datasheet

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SN74ACT573DW

Texas InstrumentsIn Stock: 2818SN74ACT573DW Datasheet

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SN74ACT573NSR

Texas InstrumentsIn Stock: 2810SN74ACT573NSR Datasheet

SimilarRFQ

SN74ACT563DWR

Texas InstrumentsIn Stock: 3766SN74ACT563DWR Datasheet

Parametric EquivalentRFQ

SN74ACT573DWR

Texas InstrumentsIn Stock: 14076SN74ACT573DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ573SCX is determined by the following critical parameters:

Primary Substitution Criteria:

• Logic Type: D-Type Transparent Latch
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Independent Circuits: 1

Secondary Compatibility Factors:

• Circuit Configuration: 8:8 (preferred for direct replacement)
• Current - Output High, Low: 24mA, 24mA
• Delay Time - Propagation: within acceptable range for logic timing applications

Substitute parts are grouped into two categories: Direct Equivalents (matching 8:8 circuit configuration) and Parametric Equivalents (alternative circuit configurations with compatible electrical characteristics).

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Replacements (8:8 Circuit Configuration, Active Status):

SN74ACT573DWR (Texas Instruments) is the primary recommended substitute. This part maintains identical 8:8 circuit configuration, matching electrical specifications, and is currently active in production. It offers the highest procurement reliability and long-term availability.

SN74ACT563DWR (Texas Instruments) serves as an alternative direct replacement with equivalent propagation delay (6.5ns) and identical package specifications. This part is also active and provides comparable performance characteristics.

Alternative Substitutes (Different Circuit Configuration):

MC74ACT573DWG and MC74ACT573DWR2G (onsemi) feature 1:8 circuit configuration instead of 8:8. These parts are active and available but require circuit design verification to confirm functional compatibility with the original 8:8 configuration requirement.

Obsolete Alternatives (Not Recommended for New Designs):

CD74ACT573M and CD74ACT573M96 (Harris Corporation) maintain 8:8 configuration but are obsolete. These parts offer superior propagation delay (3.1ns) and extended operating temperature range (-55°C ~ 125°C) but should not be selected for new designs due to discontinued status.

SN74ACT573DW (Texas Instruments) is discontinued at DiGi Electronics and should not be considered for procurement.

Package Consideration:

SN74ACT573NSR uses a 20-SO package (0.209" width) instead of the standard 20-SOIC (0.295" width). This narrower package may require PCB layout modification and is suitable only when space constraints justify the design change.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT573DWG or MC74ACT573DWR2G be used as direct replacements for 74ACTQ573SCX?

A: These parts are electrically compatible but feature 1:8 circuit configuration instead of 8:8. Functional compatibility depends on circuit design requirements. If the original design specifically requires 8:8 configuration, these parts are not suitable direct replacements.

Q: What is the difference between SN74ACT573DWR and SN74ACT563DWR?

A: Both parts are active Texas Instruments products with identical electrical characteristics and 20-SOIC packaging. The primary difference is the base product number (74ACT573 versus 74ACT563). Both are functionally equivalent for the 74ACTQ573SCX application.

Q: Why is SN74ACT573NSR listed if it has a different package?

A: SN74ACT573NSR maintains the same 8:8 circuit configuration and electrical specifications but uses a narrower 20-SO package (0.209" width) compared to the standard 20-SOIC (0.295" width). This part is suitable only if PCB layout modifications are acceptable.

Q: Are the Harris Corporation parts (CD74ACT573M, CD74ACT573M96) viable options?

A: These parts offer superior propagation delay (3.1ns) and extended temperature range (-55°C ~ 125°C) but are obsolete. They should not be selected for new designs or long-term procurement strategies.

Q: What compliance certifications apply to these substitute parts?

A: Active substitute parts (SN74ACT573DWR, SN74ACT563DWR, MC74ACT573DWG, MC74ACT573DWR2G, SN74ACT573NSR) are ROHS3 compliant and REACH unaffected. All parts carry EAR99 export classification and HTSUS code 8542.39.0001.