74LCX652WM Equivalent & Substitute Parts

Part Overview

The 74LCX652WM is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit bidirectional data transmission with 3-state output capability. This component operates across a 2V to 3.6V supply voltage range and is housed in a 24-SOP surface mount package. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74LCX652WM

onsemiIn Stock: 124074LCX652WM Datasheet

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SN74LVC652ADW

Texas InstrumentsIn Stock: 2531SN74LVC652ADW Datasheet

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SN74LVC652ADWR

Texas InstrumentsIn Stock: 4949SN74LVC652ADWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LCX652WM is determined by strict equivalence across the following critical parameters:

Logic function and architecture: Non-inverting transceiver with 1 element and 8 bits per element Output configuration: 3-state output capability Output current capability: 24mA for both high and low states Operating temperature range: -40°C to 85°C Package form factor: 24-SOIC surface mount package with 0.295" width and 7.50mm physical dimensions Supply voltage compatibility: The substitute must operate within or encompass the original 2V to 3.6V range

The identified substitutes (SN74LVC652ADW and SN74LVC652ADWR) maintain functional and electrical equivalence while offering extended supply voltage range (1.65V to 3.6V) and active product status from Texas Instruments.

Parameter Comparison

Engineering Selection Recommendations

Both SN74LVC652ADW and SN74LVC652ADWR from Texas Instruments serve as direct functional equivalents to the obsolete 74LCX652WM. The primary distinction between these two substitutes is packaging format: SN74LVC652ADW is supplied in tube packaging, while SN74LVC652ADWR is supplied in tape and reel format for automated assembly processes.

The Texas Instruments alternatives offer the advantage of active product status, ensuring long-term availability and supply chain stability. Both substitutes maintain ROHS3 compliance and identical electrical performance characteristics. The extended lower supply voltage limit (1.65V versus 2V) provides additional operational flexibility without compromising compatibility with existing 2V to 3.6V system designs.

Selection between the two Texas Instruments options should be based on procurement and assembly requirements rather than electrical performance, as both are electrically and functionally identical.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC652ADW directly replace the 74LCX652WM without circuit modifications?

A: Yes. Both parts maintain identical logic function, output current capability (24mA), operating temperature range (-40°C to 85°C), and 24-SOIC package dimensions. The supply voltage range of the substitute encompasses the original specification, ensuring full compatibility.

Q: What is the difference between SN74LVC652ADW and SN74LVC652ADWR?

A: These parts are electrically and functionally identical. The difference is packaging format: ADW is supplied in tube packaging for manual handling, while ADWR is supplied in tape and reel format optimized for automated pick-and-place assembly equipment.

Q: Why does the substitute have a lower minimum supply voltage (1.65V vs 2V)?

A: The SN74LVC652 series from Texas Instruments is designed with extended voltage range capability. This broader specification does not affect compatibility with systems operating at 2V or higher, as the part functions correctly across its entire rated range.

Q: Are there any package or pinout differences between the 74LCX652WM and the SN74LVC652 variants?

A: No. Both the original and substitute parts use the 24-SOIC package with identical 0.295" width and 7.50mm physical dimensions. Pinout and package footprint are equivalent, allowing direct PCB substitution.

Q: What is the significance of the obsolete status of the 74LCX652WM?

A: Obsolete status indicates the part is no longer manufactured by onsemi. Using an active substitute such as the SN74LVC652ADW or SN74LVC652ADWR ensures continued availability for repairs, replacements, and future production runs.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both SN74LVC652ADW and SN74LVC652ADWR are ROHS3 compliant, meeting environmental and regulatory requirements for electronic components in regulated markets.