74ABT574CMTCX Equivalent & Substitute Parts

Part Overview

The 74ABT574CMTCX 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 a clock frequency of 200 MHz 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. Texas Instruments offers functionally compatible alternatives that maintain core electrical specifications while providing active product status and improved availability.

Substiute Parts

74ABT574CMTCX

onsemiIn Stock: 1279374ABT574CMTCX 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 for the 74ABT574CMTCX is determined by strict adherence to the following electrical and mechanical parameters:

Core Compatibility Criteria:

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

Package Considerations: Substitutes are grouped by package type. The 74ABT574CMTCX uses 20-TSSOP packaging. Substitutes with identical 20-TSSOP packaging provide direct pin-compatible replacement. The SN74ABT574ADBR variant uses 20-SSOP packaging (0.209", 5.30mm Width), which differs in physical dimensions and requires PCB layout verification.

Output Configuration: The main part features tri-state inverted output. Substitute parts from Texas Instruments feature tri-state non-inverted output, requiring logic inversion consideration in circuit design.

Parameter Comparison

Engineering Selection Recommendations

SN74ABT574APWR (Tape & Reel Packaging) This Texas Instruments substitute provides active product status with ROHS3 compliance. The 20-TSSOP package matches the original 74ABT574CMTCX footprint exactly, enabling direct PCB replacement. Tape & Reel packaging supports high-volume production requirements. Quiescent current increases from 50µA to 250µA, and propagation delay extends from 5ns to 6.6ns. These parameter shifts remain within acceptable operational margins for most 74ABT logic applications.

SN74ABT574APW (Tube Packaging) This Texas Instruments variant offers identical electrical specifications and 20-TSSOP package compatibility as the APWR version. Tube packaging accommodates lower-volume or manual assembly processes. Product status is active with ROHS3 compliance. Selection between APW and APWR depends on production volume and assembly methodology.

SN74ABT574ADBR (20-SSOP Package) This Texas Instruments option provides active product status and ROHS3 compliance but uses 20-SSOP packaging with different physical dimensions (0.209", 5.30mm Width versus 0.173", 4.40mm Width). This package variant requires PCB layout redesign and is not pin-compatible for direct board replacement. Selection of this part is appropriate only when PCB redesign is feasible or when 20-TSSOP alternatives are unavailable.

All three Texas Instruments substitutes maintain the 74ABT series designation, 200 MHz clock frequency, positive edge trigger, and 4.5V to 5.5V supply voltage range. The output configuration difference (non-inverted versus inverted) requires circuit-level logic verification.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT574APWR directly replace the 74ABT574CMTCX on an existing PCB? A: Yes, the SN74ABT574APWR provides direct pin-compatible replacement. Both parts use identical 20-TSSOP packaging with 0.173" width and 4.40mm dimensions. No PCB layout modifications are required for physical placement.

Q: What is the difference between the three Texas Instruments substitutes? A: The SN74ABT574APWR and SN74ABT574APW are electrically identical and use 20-TSSOP packaging. They differ only in packaging format: APWR uses Tape & Reel for high-volume production, while APW uses Tube for lower volumes. The SN74ABT574ADBR uses 20-SSOP packaging with different physical dimensions and requires PCB redesign.

Q: Does the increased quiescent current (250µA versus 50µA) affect circuit performance? A: The quiescent current increase occurs during standby conditions. For most 74ABT logic applications, this parameter shift does not impact functional performance. Power consumption analysis should be performed for battery-powered or low-power applications.

Q: Why do the Texas Instruments parts have longer propagation delay (6.6ns versus 5ns)? A: The propagation delay difference of 1.6ns remains within acceptable timing margins for 74ABT logic family applications operating at 200 MHz. Timing-critical circuits should verify that system setup and hold time requirements accommodate this specification variance.

Q: What does the output configuration difference (inverted versus non-inverted) mean? A: The 74ABT574CMTCX produces inverted outputs, while Texas Instruments substitutes produce non-inverted outputs. This requires logic inversion in the circuit design, either through additional inverter gates or firmware-level logic adjustment, depending on system architecture.

Q: Are all substitutes RoHS compliant? A: The Texas Instruments substitutes (SN74ABT574APWR, SN74ABT574APW, SN74ABT574ADBR) are ROHS3 compliant. The original 74ABT574CMTCX is REACH Unaffected. Regulatory compliance verification should be performed based on end-product requirements.

Q: Which substitute should I select for new designs? A: For new designs requiring 20-TSSOP packaging, select either SN74ABT574APWR (high-volume production) or SN74ABT574APW (lower volumes). Both provide active product status and identical electrical performance. The SN74ABT574ADBR is appropriate only if 20-SSOP packaging is acceptable and PCB redesign is feasible.