74ABT573CMTC Equivalent & Substitute Parts

Part Overview

The 74ABT573CMTC 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 identification of equivalent and substitute parts essential for design continuity and procurement planning. The part operates within a 4.5V to 5.5V supply voltage range and is housed in a 20-TSSOP surface mount package. Locating active alternative parts ensures project feasibility and supply chain reliability.

Substiute Parts

74ABT573CMTC

onsemiIn Stock: 98474ABT573CMTC Datasheet

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74LVT573MTC

Fairchild SemiconductorIn Stock: 630074LVT573MTC 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 74ABT573CMTC is determined by the following critical parameters:

Functional Equivalence: Logic type (D-Type Transparent Latch), circuit configuration (8:8), output type (tri-state), and independent circuits (1) must remain identical across all substitutes.

Electrical Compatibility: Supply voltage range, propagation delay, and output current specifications define operational compatibility. The 74ABT573CMTC operates at 4.5V–5.5V with 2.7ns propagation delay and 32mA/64mA output current.

Package Compatibility: Surface mount packaging and physical dimensions (20-TSSOP or equivalent 20-pin packages) determine PCB-level interchangeability.

Environmental & Compliance: Operating temperature range (-40°C to 85°C), moisture sensitivity level, and regulatory compliance (REACH, ECCN) must be maintained or exceeded.

Substitute parts are grouped into two categories:

Category 1 – Direct Equivalents (Same Series, Same Package): SN74ABT573APWR, SN74ABT573APW, and SN74ABT573ADBR maintain the 74ABT series designation, identical functional specifications, and compatible packaging. These parts are active and fully supported.

Category 2 – Functional Alternatives (Different Series, Different Voltage): 74LVT573MTC provides equivalent functionality but operates at a lower voltage range (2.7V–3.6V) and exhibits different propagation delay (4.4ns). This part is suitable only for applications where lower supply voltage is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended): SN74ABT573APWR, SN74ABT573APW, and SN74ABT573ADBR are the preferred alternatives. All three are manufactured by Texas Instruments, maintain active product status, and provide identical functional and electrical specifications to the 74ABT573CMTC. These parts carry ROHS3 compliance certification and REACH Unaffected status, meeting modern regulatory requirements. The primary distinction among these three is packaging format: SN74ABT573APWR is supplied in Tape & Reel format, SN74ABT573APW in Tube format, and SN74ABT573ADBR in Cut Tape format. Selection should be based on procurement and assembly requirements.

Package Consideration for SN74ABT573ADBR: This part uses a 20-SSOP package (0.209", 5.30mm width) compared to the 20-TSSOP package (0.173", 4.40mm width) of the main part and other substitutes. While functionally equivalent, PCB layout modifications may be required due to the slightly wider package footprint.

Secondary Alternative (Conditional): The 74LVT573MTC from Fairchild Semiconductor is functionally equivalent but operates at a reduced supply voltage range (2.7V–3.6V) versus the 4.5V–5.5V requirement of the 74ABT573CMTC. This part is suitable only for applications designed for lower voltage operation and should not be used as a direct replacement in 5V systems without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ABT573ADBR as a direct replacement for 74ABT573CMTC on my PCB?

A: SN74ABT573ADBR is functionally and electrically equivalent; however, it uses a 20-SSOP package instead of 20-TSSOP. The package is slightly wider (5.30mm vs. 4.40mm), which may require PCB footprint adjustment. Verify your PCB layout accommodates the larger package before substitution.

Q: What is the difference between SN74ABT573APWR, SN74ABT573APW, and SN74ABT573ADBR?

A: All three parts are electrically and functionally identical. The differences are in packaging format: APWR is Tape & Reel (for automated assembly), APW is Tube (for manual handling), and ADBR is Cut Tape (for semi-automated processes). Select based on your assembly method and procurement workflow.

Q: Is 74LVT573MTC compatible with my 5V system?

A: No. The 74LVT573MTC operates at 2.7V–3.6V supply voltage, while the 74ABT573CMTC requires 4.5V–5.5V. Using 74LVT573MTC in a 5V system will cause component failure. This part is suitable only for 3.3V or lower voltage designs.

Q: Why is the 74ABT573CMTC obsolete?

A: The 74ABT573CMTC is no longer manufactured by onsemi. Active alternatives from Texas Instruments (SN74ABT573 series) provide identical functionality and are recommended for new designs and replacements.

Q: Do all substitute parts meet RoHS and REACH compliance?

A: The three primary Texas Instruments substitutes (SN74ABT573APWR, SN74ABT573APW, SN74ABT573ADBR) are ROHS3 compliant and REACH Unaffected. The 74LVT573MTC compliance status is not specified in available documentation. Verify compliance requirements for your application before selection.

Q: What is the propagation delay difference between the main part and substitutes?

A: The 74ABT573CMTC has a 2.7ns propagation delay, while the Texas Instruments substitutes (SN74ABT573 series) have 4ns, and the 74LVT573MTC has 4.4ns. For timing-critical applications, verify that the longer delays in substitute parts do not exceed system requirements.