74F543SC Equivalent & Substitute Parts

Part Overview

The 74F543SC is a non-inverting transceiver logic integrated circuit manufactured by onsemi, designed for 8-bit data transmission with 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 24-SOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

74F543SC

onsemiIn Stock: 96074F543SC Datasheet

Current PartRFQ

SN74F543DW

Texas InstrumentsIn Stock: 10343SN74F543DW Datasheet

DirectRFQ

SN74F543DWR

Texas InstrumentsIn Stock: 4011SN74F543DWR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F543SC is determined by strict equivalence across the following critical parameters:

• Logic type and function: Transceiver, Non-Inverting configuration
• Bit width and element count: 1 element, 8 bits per element
• Output architecture: 3-State output capability
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C
• Package form factor: 24-SOIC surface mount package with 0.295" (7.50mm) width

The substitute parts SN74F543DW and SN74F543DWR, both manufactured by Texas Instruments, maintain identical functional specifications and package dimensions. Both parts are members of the 74F logic series and provide equivalent transceiver performance. The primary distinction between these substitutes is packaging format: SN74F543DW is supplied in tube packaging, while SN74F543DWR is supplied in tape and reel format.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the 74F543SC, SN74F543DWR is the preferred substitute. This part is manufactured by Texas Instruments, maintains active product status, and carries ROHS3 compliance certification. The active status ensures continued availability and manufacturing support.

SN74F543DW serves as a secondary alternative, offering identical functional and electrical specifications with ROHS3 compliance. However, this part carries a Last Time Buy status, indicating limited future availability.

Both Texas Instruments substitutes are electrically and mechanically compatible with the 74F543SC. The output current specification for the low state differs slightly (15mA versus 3mA in the original part), but this represents an improvement in drive capability and does not restrict compatibility in standard applications.

Frequently Asked Questions (FAQ)

Q: Can SN74F543DW and SN74F543DWR be used interchangeably with 74F543SC?

A: Yes. Both parts are functionally equivalent. The primary difference is packaging format: SN74F543DW uses tube packaging while SN74F543DWR uses tape and reel format. Selection depends on assembly process requirements and procurement volume.

Q: What is the significance of the product status difference?

A: The 74F543SC is obsolete, meaning onsemi no longer manufactures it. SN74F543DWR is active, ensuring long-term availability. SN74F543DW is Last Time Buy, indicating a defined end-of-life date. For new designs or long-term support, SN74F543DWR is recommended.

Q: Are there any electrical differences between these parts?

A: The output low current specification differs: 74F543SC specifies 3mA while both Texas Instruments parts specify 15mA. This represents increased drive capability and is compatible with all standard applications designed for the original part.

Q: Do the substitute parts meet current compliance standards?

A: Yes. Both SN74F543DW and SN74F543DWR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Is the 24-SOIC package identical across all three parts?

A: Yes. All three parts use the 24-SOIC package with 0.295" (7.50mm) width, ensuring identical PCB footprint and assembly compatibility.