SN74ACT573DWRG4 Equivalent & Substitute Parts

Part Overview

The SN74ACT573DWRG4 is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability. This component is designed for digital logic applications requiring transparent latch functionality in a 20-SOIC surface mount package. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Suitable alternatives maintain the same electrical characteristics, package form factor, and functional performance while offering active product status and improved availability.

Substiute Parts

SN74ACT573DWRG4

Texas InstrumentsIn Stock: 1077SN74ACT573DWRG4 Datasheet

Current PartRFQ

SN74ACT573DWR

Texas InstrumentsIn Stock: 14076SN74ACT573DWR Datasheet

MFR RecommendedRFQ

MC74ACT573DWR2G

onsemiIn Stock: 2225MC74ACT573DWR2G Datasheet

DirectRFQ

MC74ACT573DWG

onsemiIn Stock: 1184MC74ACT573DWG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT573DWRG4 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Logic Type: D-Type Transparent Latch
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Base Product Number: 74ACT series

Secondary Considerations:

• Operating Temperature Range: -40°C ~ 85°C
• RoHS Compliance: ROHS3 Compliant
• Independent Circuits: 1

The identified substitutes maintain functional equivalence through identical package geometry, voltage specifications, and tri-state output architecture. Variations in propagation delay (6ns vs. 10.5ns) and moisture sensitivity level remain within acceptable tolerances for standard logic applications. Circuit configuration differences (8:8 vs. 1:8) reflect manufacturer design variations within the 74ACT573 base product family while preserving functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74ACT573DWR

The SN74ACT573DWR from Texas Instruments is the direct manufacturer-recommended substitute. This part maintains identical electrical specifications including 6ns propagation delay and MSL 1 moisture sensitivity rating. Active product status ensures long-term availability and supply chain continuity. Tape & Reel packaging format supports high-volume production environments.

Alternative Substitutes: MC74ACT573DWR2G and MC74ACT573DWG

The onsemi MC74ACT573 variants provide functional equivalence with active product status. Both parts maintain identical voltage specifications, output current ratings, and operating temperature range. The 10.5ns propagation delay represents a measurable increase from the original 6ns specification but remains within acceptable performance parameters for standard logic applications. MSL 3 rating requires controlled storage conditions (168-hour exposure limit) compared to the unlimited MSL 1 rating of the original part. MC74ACT573DWR2G is supplied in Tape & Reel format for automated assembly, while MC74ACT573DWG is supplied in Tube format for manual handling applications.

Compliance Verification

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component specifications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT573DWR directly replace the SN74ACT573DWRG4 in existing designs?

A: Yes. The SN74ACT573DWR is the manufacturer-recommended direct substitute, maintaining identical electrical characteristics, package geometry, and functional performance. The primary difference is product status (active vs. discontinued) and packaging format (Tape & Reel vs. Tube).

Q: What is the impact of the 10.5ns propagation delay in onsemi substitutes compared to the original 6ns specification?

A: The onsemi MC74ACT573 variants introduce a 4.5ns delay increase. This difference is application-dependent. For timing-critical circuits with tight setup/hold time requirements, this delay may require circuit re-evaluation. For standard logic applications with relaxed timing constraints, this delay remains acceptable.

Q: Are there packaging considerations when switching between substitutes?

A: Yes. The SN74ACT573DWR and MC74ACT573DWR2G are supplied in Tape & Reel format, suitable for automated pick-and-place assembly. The MC74ACT573DWG is supplied in Tube format, requiring manual component handling. Verify your assembly process compatibility before selection.

Q: What is the significance of the MSL 3 rating on onsemi parts versus MSL 1 on the original?

A: MSL 1 (Unlimited) allows indefinite storage without moisture absorption concerns. MSL 3 (168 Hours) requires controlled storage conditions and limits the component's exposure to ambient humidity to 168 hours before soldering. If extended storage or uncontrolled warehouse conditions are present, the Texas Instruments SN74ACT573DWR with MSL 1 rating is preferred.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original component's regulatory certifications.

Q: What is the circuit configuration difference between 8:8 and 1:8?

A: Both configurations represent valid implementations of the D-Type Transparent Latch within the 74ACT573 product family. The functional behavior and pin compatibility remain consistent across these variants for standard logic applications.