74ABT573CSC Equivalent & Substitute Parts

Part Overview

The 74ABT573CSC 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 is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package.

Substiute Parts

74ABT573CSC

onsemiIn Stock: 75574ABT573CSC Datasheet

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SN74ABT573ADW

Texas InstrumentsIn Stock: 2405SN74ABT573ADW Datasheet

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SN74ABT573ADWR

Texas InstrumentsIn Stock: 11745SN74ABT573ADWR Datasheet

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SN74ABT573ANSR

Texas InstrumentsIn Stock: 711SN74ABT573ANSR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT573CSC is determined by strict alignment with the following critical parameters:

• Logic Type: D-Type Transparent Latch
• Circuit Configuration: 8:8
• Output Type: Tri-State
• Supply Voltage Range: 4.5V ~ 5.5V
• Independent Circuits: 1
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 20-SOIC or compatible 20-SO variants
• Mounting Type: Surface Mount

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in propagation delay time (2.7ns vs. 4ns) and packaging format (tube, cut tape, or digi-reel) do not affect functional substitutability within the defined parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

SN74ABT573ADW and SN74ABT573ADWR are the primary recommended substitutes for the obsolete 74ABT573CSC. Both parts are manufactured by Texas Instruments with active product status and ROHS3 compliance. These variants maintain identical electrical specifications and package dimensions (20-SOIC, 0.295" width). The SN74ABT573ADW is supplied in tube packaging, while the SN74ABT573ADWR is available in cut tape and digi-reel format, providing flexibility for different procurement and assembly workflows.

SN74ABT573ANSR is a secondary substitute option with active historical status, though it is currently discontinued at DiGi Electronics. This part features a narrower 20-SO package (0.209" width) compared to the standard 20-SOIC footprint. While electrically equivalent, the package width difference may require PCB layout verification before implementation.

All substitute parts maintain REACH compliance and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT573ADW directly replace the 74ABT573CSC on existing PCBs?

A: Yes. The SN74ABT573ADW maintains identical electrical specifications and package dimensions (20-SOIC, 0.295" width), enabling direct pin-for-pin substitution without PCB modification.

Q: What is the difference between SN74ABT573ADW and SN74ABT573ADWR?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: SN74ABT573ADW is supplied in tube packaging, while SN74ABT573ADWR is supplied in cut tape and digi-reel format. Selection depends on assembly process requirements and procurement volume.

Q: Why does the SN74ABT573ANSR have a different package width?

A: The SN74ABT573ANSR uses a 20-SO package with 0.209" width, compared to the standard 20-SOIC at 0.295" width. While functionally equivalent, the narrower package may require PCB footprint verification for compatibility with existing designs.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitute parts (SN74ABT573ADW, SN74ABT573ADWR, and SN74ABT573ANSR) are ROHS3 compliant. The original onsemi 74ABT573CSC RoHS status was not specified in available documentation.

Q: What is the propagation delay difference between the original and substitute parts?

A: The 74ABT573CSC specifies 2.7ns propagation delay, while all Texas Instruments substitutes specify 4ns. This 1.3ns difference is within typical logic IC tolerance ranges and does not affect functional compatibility in standard applications.

Q: Are all parts REACH compliant?

A: Yes. The 74ABT573CSC and all substitute parts maintain REACH Unaffected status, indicating compliance with REACH regulations.