PI3USB221XAEX Equivalent & Substitute Parts

Part Overview

The PI3USB221XAEX is a USB Switch IC manufactured by Diodes Incorporated, designed for single-channel 2:1 multiplexing applications in USB 2.0 systems. This component features bi-directional switching capability with low on-state resistance and operates across a 2.3V to 3.6V supply range. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

PI3USB221XAEX

Diodes IncorporatedIn Stock: 8681PI3USB221XAEX Datasheet

Current PartRFQ

PI3USB221AZUAEX

Diodes IncorporatedIn Stock: 6998PI3USB221AZUAEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI3USB221XAEX is determined by strict equivalence across the following critical parameters:

• Base product number: PI3USB221 (same functional design)
• Number of channels: 1 (single-channel switching)
• Multiplexer/Demultiplexer circuit: 2:1 (identical switching configuration)
• On-state resistance: 6 Ohm maximum (electrical performance requirement)
• Supply voltage range: 2.3V ~ 3.6V (power compatibility)
• Bandwidth: 1.1 GHz (-3dB specification for signal integrity)
• Features: Bi-directional, USB 2.0 (functional capability)
• Operating temperature: -40°C ~ 85°C (thermal operating range)
• Compliance: ROHS3 Compliant, MSL 1 (regulatory and handling requirements)

The PI3USB221AZUAEX meets all these criteria and is therefore a direct functional equivalent. The primary difference is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The PI3USB221AZUAEX is the direct substitute for the obsolete PI3USB221XAEX. Both components share identical electrical specifications, functional characteristics, and compliance certifications. The PI3USB221AZUAEX maintains active product status with Diodes Incorporated, ensuring continued availability and manufacturing support.

The primary distinction between these parts is the package format: the original uses 10-UFLGA (2x1.5mm) while the substitute uses 10-UFQFN (1.5x2mm). Both are surface-mount packages with equivalent pin counts and electrical performance. PCB layout modifications may be required to accommodate the different package dimensions.

Both parts are ROHS3 compliant and carry MSL 1 rating, indicating no moisture sensitivity restrictions during storage and handling. Selection of the PI3USB221AZUAEX is appropriate for new designs and legacy system replacements requiring USB 2.0 single-channel switching functionality.

Frequently Asked Questions (FAQ)

Q: Can the PI3USB221AZUAEX be used as a direct replacement for the PI3USB221XAEX?

A: Yes. Both parts share identical electrical specifications, including on-state resistance, supply voltage range, bandwidth, and operating temperature. The functional performance is equivalent. PCB layout adjustment is necessary due to package format differences.

Q: What is the difference between the 10-UFLGA and 10-UFQFN packages?

A: The 10-UFLGA package measures 2x1.5mm while the 10-UFQFN package measures 1.5x2mm. Both are 10-pin surface-mount packages with the same pin count and electrical connectivity. The footprint dimensions differ, requiring PCB redesign for physical compatibility.

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

A: No. Both the PI3USB221XAEX and PI3USB221AZUAEX are ROHS3 compliant with MSL 1 rating. Regulatory compliance is identical.

Q: Why is the PI3USB221XAEX classified as obsolete?

A: The PI3USB221XAEX has reached end-of-life status with Diodes Incorporated. The PI3USB221AZUAEX represents the active product continuation with equivalent functionality.

Q: What applications are supported by these USB Switch ICs?

A: Both parts are designed for USB 2.0 applications requiring single-channel 2:1 multiplexing with bi-directional switching capability. Operating voltage range of 2.3V to 3.6V supports both standard and low-power USB implementations.

Q: Are inventory considerations important when selecting between these parts?

A: The PI3USB221XAEX is obsolete with limited remaining inventory. The PI3USB221AZUAEX is actively manufactured and stocked, providing reliable long-term availability for production and support applications.