SN74F543DW Equivalent & Substitute Parts

Part Overview

The SN74F543DW is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments. It features 1 element with 8 bits per element and 3-state output capability, housed in a 24-SOIC surface mount package. The device operates within a 4.5V to 5.5V supply voltage range and is rated for 0°C to 70°C operating temperature.

The SN74F543DW carries a Last Time Buy product status, indicating that the manufacturer has discontinued active production. This status necessitates identifying equivalent substitute parts to ensure continued availability for new designs, repairs, and production continuity.

Substiute Parts

SN74F543DW

Texas InstrumentsIn Stock: 10343SN74F543DW Datasheet

Current PartRFQ

SN74F543DWR

Texas InstrumentsIn Stock: 4011SN74F543DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74F543DW is determined by strict equivalence across the following critical parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current Specifications: Output High (3mA, 24mA) and Output Low (15mA, 64mA)
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: 0°C ~ 70°C
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

The only permissible variation between the main part and substitute parts is the packaging format (Tube versus Tape & Reel), which does not affect electrical or mechanical compatibility. All other parameters must remain identical for functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The SN74F543DWR is the manufacturer-recommended substitute for the SN74F543DW. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is the packaging format: the SN74F543DW is supplied in Tube packaging, while the SN74F543DWR is supplied in Tape & Reel (TR) format. This difference does not affect component functionality, performance, or PCB assembly compatibility.

The SN74F543DWR carries an Active product status, ensuring continued availability and manufacturing support from Texas Instruments. Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, confirming regulatory and environmental equivalence.

Frequently Asked Questions (FAQ)

Q: Can the SN74F543DWR be used as a direct replacement for the SN74F543DW?

A: Yes. The SN74F543DWR is electrically and mechanically equivalent to the SN74F543DW. All functional parameters, electrical specifications, and package dimensions are identical. The only difference is the packaging format (Tape & Reel versus Tube).

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging supplies individual components in a plastic tube, typically used for lower-volume orders or manual assembly. Tape & Reel packaging supplies components on a continuous reel, optimized for automated pick-and-place assembly equipment. Both formats contain the same component with identical specifications.

Q: Are there any compatibility concerns when substituting the SN74F543DWR for the SN74F543DW?

A: No compatibility concerns exist. The 24-SOIC package dimensions, pin configuration, electrical characteristics, and operating parameters are identical. PCB layouts, solder profiles, and assembly processes require no modification.

Q: Why is the SN74F543DW marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued active production of this part number. The SN74F543DWR, with Active product status, represents the current manufacturing equivalent and should be used for new designs and ongoing production requirements.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SN74F543DW and SN74F543DWR are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited). Regulatory and environmental compliance is equivalent.