74ABT543CSC Equivalent & Substitute Parts

Part Overview

The 74ABT543CSC is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This component operates within a 4.5V to 5.5V supply voltage range and is housed in a 24-SOP package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74ABT543CSC

onsemiIn Stock: 287674ABT543CSC Datasheet

Current PartRFQ

SN74ABT543ADWR

Texas InstrumentsIn Stock: 11209SN74ABT543ADWR Datasheet

SimilarRFQ

SN74ABT543ADW

Texas InstrumentsIn Stock: 2249SN74ABT543ADW Datasheet

Parametric EquivalentRFQ

SN74ABT646ADW

Texas InstrumentsIn Stock: 2272SN74ABT646ADW Datasheet

Parametric EquivalentRFQ

SN74ABT646DW

Texas InstrumentsIn Stock: 1147SN74ABT646DW Datasheet

Parametric EquivalentRFQ

SN74ABT652ADW

Texas InstrumentsIn Stock: 1274SN74ABT652ADW Datasheet

Parametric EquivalentRFQ

SN74ABT657ADW

Texas InstrumentsIn Stock: 972SN74ABT657ADW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT543CSC are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Core Electrical Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 32mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)

Mechanical Parameters:

• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

All substitute parts listed maintain identical electrical specifications and package dimensions, ensuring direct functional replacement. Substitutes are grouped by base product number (74ABT543, 74ABT646, 74ABT652, 74ABT657) and manufacturer (Texas Instruments), with all active-status alternatives sourced from established suppliers.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ABT543ADWR

The SN74ABT543ADWR from Texas Instruments is the direct functional equivalent to the 74ABT543CSC. This part maintains active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance certification and is available in high inventory quantities (11,100 units), making it the preferred choice for new designs and production continuity.

Secondary Alternatives: SN74ABT543ADW

The SN74ABT543ADW provides identical electrical and mechanical specifications with active product status and ROHS3 compliance. This variant differs only in packaging format (Tube) and is suitable for applications where packaging preference aligns with procurement requirements.

Extended Substitutes: SN74ABT646ADW, SN74ABT646DW, SN74ABT652ADW, SN74ABT657ADW

These parts share identical electrical parameters and package specifications but carry different base product numbers (74ABT646, 74ABT652, 74ABT657). All maintain active status and ROHS3 compliance. Selection among these variants depends on specific application requirements and design compatibility with the base product series.

Frequently Asked Questions (FAQ)

Q: Can the SN74ABT543ADWR directly replace the 74ABT543CSC without circuit modifications?

A: Yes. The SN74ABT543ADWR maintains identical electrical specifications (supply voltage, output current, operating temperature range) and package dimensions (24-SOIC). Direct pin-for-pin substitution is supported.

Q: What is the difference between SN74ABT543ADWR and SN74ABT543ADW?

A: Both parts are electrically and mechanically identical. The primary difference is packaging format: SN74ABT543ADWR is supplied in tape-and-reel format, while SN74ABT543ADW is supplied in Tube packaging. Selection depends on procurement and assembly line requirements.

Q: Why are parts with different base numbers (74ABT646, 74ABT652, 74ABT657) listed as substitutes?

A: These parts maintain identical electrical parameters and package specifications as the 74ABT543CSC. They are functionally compatible transceiver ICs within the 74ABT logic family. Substitution is valid when circuit design does not depend on specific base product functionality beyond the core transceiver operation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitute parts listed carry ROHS3 compliance certification, meeting environmental and regulatory requirements for modern electronics manufacturing.

Q: What is the significance of the obsolete status for the 74ABT543CSC?

A: Obsolete status indicates the part is no longer manufactured by onsemi. Active-status substitutes from Texas Instruments ensure continued availability, supply chain reliability, and access to current manufacturing processes and quality standards.

Q: Can I use these substitutes in existing designs without re-qualification?

A: Electrical and mechanical compatibility is established through identical parameter specifications. Design re-qualification depends on your organization's quality and compliance procedures. Consult your design documentation and supplier datasheets for application-specific requirements.