SN74ACT573DW Equivalent & Substitute Parts

Part Overview

The SN74ACT573DW is a D-Type Transparent Latch logic IC manufactured by Texas Instruments, featuring an 8:8 circuit configuration with tri-state output capability in a 20-SOIC surface mount package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design requirements and production continuity. The part operates within a 4.5V to 5.5V supply voltage range with a 6ns propagation delay and supports output currents of 24mA for both high and low states.

Substiute Parts

SN74ACT573DW

Texas InstrumentsIn Stock: 2818SN74ACT573DW Datasheet

Current PartRFQ

SN74ACT573DWR

Texas InstrumentsIn Stock: 14076SN74ACT573DWR Datasheet

DirectRFQ

MC74ACT573DWR2G

onsemiIn Stock: 2225MC74ACT573DWR2G Datasheet

DirectRFQ

MC74ACT573DWG

onsemiIn Stock: 1184MC74ACT573DWG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74ACT573DW is determined by the following critical parameters:

• Logic Type & Circuit Function: D-Type Transparent Latch with tri-state output capability
• Package Compatibility: 20-SOIC surface mount package (0.295", 7.50mm Width)
• Electrical Specifications: Supply voltage range 4.5V ~ 5.5V, output current capability 24mA
• Operating Temperature Range: -40°C ~ 85°C
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

The substitute parts identified maintain functional equivalence through identical or compatible circuit configurations, package form factors, and electrical operating parameters. Variations in propagation delay and circuit ratio (8:8 versus 1:8) represent performance differences that must be evaluated within specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT573DWR (Texas Instruments, Tape & Reel packaging) provides the closest functional equivalence to the SN74ACT573DW. Both parts share identical circuit configuration (8:8), propagation delay (6ns), and MSL rating (1 - Unlimited). The primary difference is packaging format: Tape & Reel versus Tube. This substitute maintains full electrical and thermal compatibility with active product status.

MC74ACT573DWR2G and MC74ACT573DWG (onsemi) represent alternative sources with the same 20-SOIC package and operating parameters. These parts feature a 1:8 circuit configuration and 10.5ns propagation delay, introducing functional differences from the original specification. Both onsemi variants carry MSL rating 3 (168 Hours), requiring controlled storage conditions. Selection of these alternatives requires confirmation that the 1:8 circuit ratio and increased propagation delay are compatible with application requirements.

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

Frequently Asked Questions (FAQ)

Q: Can SN74ACT573DWR be used as a direct replacement for SN74ACT573DW?

A: Yes. Both parts are manufactured by Texas Instruments with identical electrical specifications, circuit configuration (8:8), propagation delay (6ns), and operating temperature range (-40°C ~ 85°C). The difference is packaging format: SN74ACT573DWR uses Tape & Reel while SN74ACT573DW uses Tube. Functional compatibility is complete.

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

A: The circuit configuration describes the latch channel-to-output ratio. The SN74ACT573DW features 8:8 (8 input channels to 8 output channels), while MC74ACT573DWR2G and MC74ACT573DWG feature 1:8 (1 input channel to 8 output channels). This represents a fundamental functional difference that must be evaluated against specific application requirements.

Q: Does the 10.5ns propagation delay of onsemi parts affect compatibility?

A: The onsemi variants (MC74ACT573DWR2G and MC74ACT573DWG) have a 10.5ns propagation delay compared to 6ns for the Texas Instruments parts. This 4.5ns difference may impact timing-critical applications. Compatibility depends on whether the application timing budget can accommodate the longer delay.

Q: What is the significance of MSL rating differences?

A: The SN74ACT573DW and SN74ACT573DWR carry MSL 1 (Unlimited moisture sensitivity), allowing indefinite storage without moisture control. The onsemi parts carry MSL 3 (168 Hours), requiring controlled storage conditions and baking procedures if storage exceeds 168 hours at specified humidity levels. This affects supply chain handling and storage requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts—SN74ACT573DWR, MC74ACT573DWR2G, and MC74ACT573DWG—are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment with the original SN74ACT573DW component.

Q: What packaging options are available for these parts?

A: SN74ACT573DW and MC74ACT573DWG are supplied in Tube packaging. SN74ACT573DWR and MC74ACT573DWR2G are supplied in Tape & Reel (TR) format. Selection depends on production volume and assembly equipment compatibility.