74ABT574CMSA Equivalent & Substitute Parts

Part Overview

The 74ABT574CMSA is a D-type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit capacity and tri-state inverted output configuration. This component operates at 200 MHz clock frequency with a maximum propagation delay of 5ns at 5V with 50pF load. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts maintain functional compatibility while offering active product status and improved availability.

Substiute Parts

74ABT574CMSA

onsemiIn Stock: 103574ABT574CMSA Datasheet

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SN74ABT574ADBR

Texas InstrumentsIn Stock: 4826SN74ABT574ADBR Datasheet

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SN74ABT574APW

Texas InstrumentsIn Stock: 2056SN74ABT574APW Datasheet

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SN74ABT574APWR

Texas InstrumentsIn Stock: 3006SN74ABT574APWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT574CMSA is determined by the following critical parameters:

Core Functional Parameters:

• Series: 74ABT (standard logic family)
• Type: D-Type flip-flop
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Clock Frequency: 200 MHz minimum
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C

Electrical Compatibility Parameters:

• Output Type: Tri-State configuration
• Current Output High/Low: 32mA / 64mA
• Mounting Type: Surface Mount

Package Compatibility: The 74ABT574CMSA uses 20-SSOP packaging. Substitutes may use equivalent 20-pin SSOP or 20-pin TSSOP packages, as both maintain pinout compatibility within the 74ABT574 base product family.

All three substitute parts (SN74ABT574ADBR, SN74ABT574APW, SN74ABT574APWR) meet these core requirements and are manufactured by Texas Instruments with active product status.

Parameter Comparison

Engineering Selection Recommendations

SN74ABT574ADBR is the primary substitute for direct replacement in existing 20-SSOP footprints. This part maintains identical package dimensions (0.209", 5.30mm width) to the 74ABT574CMSA, ensuring PCB compatibility without layout modifications. Texas Instruments active product status provides long-term availability and supply chain stability. ROHS3 compliance and REACH unaffected status meet current environmental and regulatory requirements.

SN74ABT574APW and SN74ABT574APWR are functionally equivalent alternatives using the 20-TSSOP package (0.173", 4.40mm width). These parts require PCB footprint modification due to reduced package width. Both maintain identical electrical specifications and regulatory compliance. SN74ABT574APWR in Tape & Reel packaging is optimized for high-volume production, while SN74ABT574APW in Tube packaging suits lower-volume applications.

All three substitutes exhibit slightly higher quiescent current (250 µA versus 50 µA) and propagation delay (6.6ns versus 5ns) compared to the main part. These differences remain within acceptable tolerances for standard 74ABT logic applications and do not preclude functional substitution.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT574ADBR replace 74ABT574CMSA without PCB modifications?

A: Yes. SN74ABT574ADBR maintains identical 20-SSOP package dimensions and pinout compatibility. No PCB layout changes are required for direct substitution.

Q: What is the difference between the three Texas Instruments substitutes?

A: SN74ABT574ADBR uses 20-SSOP packaging (0.209" width) matching the original part. SN74ABT574APW and SN74ABT574APWR use 20-TSSOP packaging (0.173" width), requiring PCB footprint modification. All three are electrically equivalent. Packaging options differ: Cut Tape for SN74ABT574ADBR, Tube for SN74ABT574APW, and Tape & Reel for SN74ABT574APWR.

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

A: Propagation delay increases from 5ns to 6.6ns, and quiescent current increases from 50 µA to 250 µA in the Texas Instruments parts. These differences are within standard 74ABT logic specifications and do not affect functional compatibility in typical applications.

Q: Do the substitute parts meet current regulatory requirements?

A: Yes. All three Texas Instruments substitutes are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The original 74ABT574CMSA regulatory status is not specified.

Q: Which substitute should be selected for new designs?

A: For new designs, select based on packaging requirements. SN74ABT574ADBR is recommended for designs requiring 20-SSOP footprints. SN74ABT574APW or SN74ABT574APWR are suitable for designs accommodating 20-TSSOP packages, with Tape & Reel packaging preferred for production volumes.

Q: Is the output type difference between parts significant?

A: The main part specifies tri-state inverted output, while substitutes specify tri-state non-inverted output. This represents a functional difference that must be evaluated against circuit requirements. Verify output polarity compatibility before substitution.