74ABT573CMSAX Equivalent & Substitute Parts

Part Overview

The 74ABT573CMSAX 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 new designs and ongoing production requirements. The part operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SSOP surface mount package.

Substiute Parts

74ABT573CMSAX

onsemiIn Stock: 74674ABT573CMSAX Datasheet

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SN74ABT573ADBR

Texas InstrumentsIn Stock: 2194SN74ABT573ADBR Datasheet

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SN74ABT573APW

Texas InstrumentsIn Stock: 1516SN74ABT573APW Datasheet

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SN74ABT573APWR

Texas InstrumentsIn Stock: 2970SN74ABT573APWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ABT573CMSAX is determined by the following critical parameters that must remain consistent across equivalent parts:

• Logic Family & Function: 74ABT series D-Type Transparent Latch with 8:8 circuit configuration
• Output Characteristics: Tri-state output capability
• Electrical Specifications: 4.5V ~ 5.5V supply voltage range, 32mA/64mA output current ratings, -40°C ~ 85°C operating temperature
• Package Compatibility: Surface mount technology with 20-pin SSOP or TSSOP package footprint

The substitute parts listed below maintain functional equivalence through identical logic family designation, circuit configuration, output type, and electrical operating parameters. Variations in propagation delay (2.7ns vs. 4ns) and package case dimensions (SSOP vs. TSSOP) represent acceptable substitution parameters within the 74ABT logic family specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ABT573ADBR (Texas Instruments)

The SN74ABT573ADBR is the direct equivalent substitute, maintaining identical package footprint (20-SSOP) and all critical electrical parameters. This part is currently in active production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment for new designs.

Alternative Options: SN74ABT573APW and SN74ABT573APWR (Texas Instruments)

Both alternatives are functionally equivalent with active product status and ROHS3 compliance. These parts utilize the 20-TSSOP package, which features a reduced width (0.173" vs. 0.209") compared to the original SSOP package. Selection of TSSOP variants requires PCB layout modification to accommodate the different package footprint. Both parts are available in different packaging formats (Tube and Tape & Reel) to support various procurement and assembly requirements.

All three Texas Instruments substitutes operate within identical electrical specifications and temperature ranges, with propagation delay specifications of 4ns remaining within acceptable performance parameters for 74ABT logic family applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT573ADBR directly replace the 74ABT573CMSAX without PCB modifications?

A: Yes. The SN74ABT573ADBR maintains the identical 20-SSOP package footprint and pin configuration, enabling direct substitution without PCB layout changes.

Q: What is the difference between the SSOP and TSSOP package options?

A: The 20-SSOP package measures 0.209" in width, while the 20-TSSOP package measures 0.173" in width. Both packages contain 20 pins with identical electrical functionality. TSSOP selection requires PCB footprint redesign but offers reduced board space consumption.

Q: Are there performance differences between the original part and the substitutes?

A: The original 74ABT573CMSAX specifies 2.7ns propagation delay, while all Texas Instruments substitutes specify 4ns. This 1.3ns difference remains within acceptable operating margins for 74ABT logic family applications and does not affect functional compatibility in standard digital logic circuits.

Q: Why is the original part listed as obsolete?

A: The 74ABT573CMSAX from onsemi has reached end-of-life status. Texas Instruments continues active production of functionally equivalent 74ABT573 variants, ensuring component availability for replacement and new design applications.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. All three Texas Instruments substitutes carry ROHS3 compliance certification and REACH Unaffected status, meeting current environmental and regulatory standards for electronic component manufacturing and distribution.

Q: What packaging formats are available for production orders?

A: The SN74ABT573ADBR is supplied in Cut Tape format. The SN74ABT573APW is supplied in Tube packaging. The SN74ABT573APWR is supplied in Tape & Reel format for automated assembly processes. Selection depends on production volume and assembly equipment requirements.