PI3USB9281AXWEX Equivalent & Substitute Parts

Part Overview

The PI3USB9281AXWEX is a USB 2.0 port detection integrated circuit manufactured by Diodes Incorporated, designed for mobile communications applications. This component functions as a Power Management IC (PMIC) in a 20-UQFN surface mount package with exposed pad. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and maintenance applications.

Substiute Parts

PI3USB9281AXWEX

Diodes IncorporatedIn Stock: 5234PI3USB9281AXWEX Datasheet

Current PartRFQ

PI3USB9281CXWEX

Diodes IncorporatedIn Stock: 20122PI3USB9281CXWEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI3USB9281AXWEX is determined by strict equivalence across the following critical parameters:

• Functional Equivalence: Both parts share the identical base product number (PI3USB9281) and perform USB 2.0 port detection for mobile communications applications
• Electrical Compatibility: Identical voltage supply range (3V ~ 5.5V) and operating temperature range (-40°C ~ 85°C)
• Package Compatibility: Both use the 20-UFQFN Exposed Pad package with identical 3x4mm dimensions
• Regulatory Compliance: Both maintain ROHS3 compliance, REACH unaffected status, and identical moisture sensitivity classification
• Mechanical Compatibility: Surface mount configuration and pin assignment remain unchanged

The substitute part PI3USB9281CXWEX differs only in product status (active versus obsolete) and packaging format (Tape & Reel versus unspecified bulk packaging).

Parameter Comparison

Engineering Selection Recommendations

The PI3USB9281CXWEX is the direct functional and electrical equivalent of the PI3USB9281AXWEX. Selection of the substitute part is justified on the following engineering grounds:

• Product Status: The PI3USB9281CXWEX maintains active product status with confirmed inventory availability (20,100 pieces), whereas the main part is obsolete with limited remaining stock (5,195 pieces)
• Regulatory Compliance: Both parts maintain identical ROHS3 compliance and REACH unaffected status, ensuring regulatory requirements are met in all target markets
• Electrical and Mechanical Interchangeability: Identical electrical specifications, package dimensions, and pin configuration ensure direct substitution without circuit redesign
• Supply Chain Continuity: The active status of PI3USB9281CXWEX ensures long-term availability for production and field replacement applications

Frequently Asked Questions (FAQ)

Q: Can PI3USB9281CXWEX be used as a direct replacement for PI3USB9281AXWEX in existing designs?

A: Yes. Both parts share identical electrical specifications, package geometry, and pin assignments. No circuit modifications are required for substitution.

Q: What is the difference between the two part numbers?

A: The primary differences are product status (obsolete versus active) and packaging format (bulk versus Tape & Reel). Electrical and functional characteristics are identical.

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

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and moisture sensitivity classification (MSL 1).

Q: What is the operating voltage range for both parts?

A: Both the PI3USB9281AXWEX and PI3USB9281CXWEX operate across a supply voltage range of 3V to 5.5V, suitable for mobile communications applications.

Q: What is the temperature operating range?

A: Both parts operate across the temperature range of -40°C to 85°C (TA), meeting industrial and commercial mobile device requirements.

Q: Is the package size identical between both parts?

A: Yes. Both parts use the 20-UFQFN Exposed Pad package with dimensions of 3x4mm. Surface mount configuration and pin layout are unchanged.

Q: What inventory status should be considered when selecting between these parts?

A: The PI3USB9281CXWEX has significantly higher inventory availability (20,100 pieces) compared to the obsolete PI3USB9281AXWEX (5,195 pieces), making it the preferred choice for new production.