74ABT540D,623 Equivalent & Substitute Parts

Part Overview

The 74ABT540D,623 is an inverting buffer logic integrated circuit manufactured by NXP USA Inc., designed for 5.5V operation with 3-state output capability. This component functions as a 1-element, 8-bit buffer with inverting logic, providing 32mA high and 64mA low output current. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

74ABT540D,623

NXP USA Inc.In Stock: 108774ABT540D,623 Datasheet

Current PartRFQ

SN74ABT540DW

Texas InstrumentsIn Stock: 2151SN74ABT540DW Datasheet

DirectRFQ

SN74ABT540DWR

Texas InstrumentsIn Stock: 4308SN74ABT540DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ABT540D,623 are identified based on strict electrical and mechanical parameter matching within the 74ABT logic family. Substitution validity is determined by equivalence in the following critical parameters:

• Logic type and function (Buffer, Inverting)
• Element and bit configuration (1 element, 8 bits per element)
• Output architecture (3-State)
• Output current specifications (32mA high, 64mA low)
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (-40°C ~ 85°C)
• Package form factor (20-SOIC)
• Surface mount compatibility
• Compliance certifications (ROHS3, REACH Unaffected)

The identified substitutes are manufactured by Texas Instruments under the same 74ABT base product number, ensuring functional and electrical compatibility while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

Both SN74ABT540DW and SN74ABT540DWR from Texas Instruments are direct functional equivalents to the obsolete 74ABT540D,623. Selection between these two substitutes is determined by procurement and supply chain requirements rather than electrical performance.

SN74ABT540DW is supplied in tube packaging, suitable for standard component handling and storage. SN74ABT540DWR is supplied in cut tape and Digi-Reel format, optimized for automated assembly and high-volume production environments.

Both substitutes maintain active product status with Texas Instruments, ensuring long-term availability and technical support. Both comply with ROHS3 and REACH requirements, matching the compliance profile of the original part. Inventory availability is higher for both alternatives compared to the obsolete NXP part, with 2100 units and 4200 units respectively in stock.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT540DW and SN74ABT540DWR be used interchangeably with 74ABT540D,623?

A: Yes. Both Texas Instruments parts are electrically and mechanically equivalent. They share identical logic function, output specifications, voltage range, temperature rating, and 20-SOIC package form factor. The difference is packaging format only.

Q: What is the difference between SN74ABT540DW and SN74ABT540DWR?

A: Both parts are identical in electrical and mechanical specifications. SN74ABT540DW is supplied in tube packaging for standard component distribution. SN74ABT540DWR is supplied in cut tape and Digi-Reel format for automated assembly lines. Selection depends on your assembly process requirements.

Q: Why is the original 74ABT540D,623 marked as obsolete?

A: The part is classified as obsolete by NXP USA Inc., indicating it is no longer in active production. The Texas Instruments equivalents SN74ABT540DW and SN74ABT540DWR provide continued access to this logic function with active product support.

Q: Are there any compliance or certification differences between these parts?

A: No. All three parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1). Compliance profiles are equivalent.

Q: Can these parts be soldered using the same reflow profile?

A: Yes. All parts use identical 20-SOIC surface mount packaging with the same thermal and mechanical characteristics, supporting the same assembly processes.