FSUSB42UMX-SN00404 Equivalent & Substitute Parts

Part Overview

The FSUSB42UMX-SN00404 is a USB Switch IC manufactured by onsemi, designed for USB signal routing and switching applications. This component features a 2-channel DPDT (Double Pole Double Throw) switch configuration with break-before-make functionality, optimized for USB 2.0 signal integrity. The part is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

FSUSB42UMX-SN00404

onsemiIn Stock: 25194FSUSB42UMX-SN00404 Datasheet

Current PartRFQ

FSUSB42UMX

onsemiIn Stock: 285405FSUSB42UMX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the FSUSB42UMX-SN00404 is determined by the following critical parameters:

• Switch Configuration: DPDT topology with break-before-make operation
• Channel Count: 2-channel switching capability
• Electrical Performance: On-state resistance of 6.5Ω maximum, 720MHz bandwidth
• Supply Voltage: 2.4V to 4.4V single supply operation
• Package Compatibility: 10-UFQFN (10-UMLP 1.8x1.4) surface mount package
• Signal Integrity: USB 2.0 compliance with appropriate bandwidth characteristics
• Compliance: ROHS3 compliance and REACH unaffected status

The primary substitute identified is FSUSB42UMX, which maintains the same electrical specifications and package footprint while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The FSUSB42UMX serves as the direct active equivalent to the obsolete FSUSB42UMX-SN00404. Both components share identical electrical specifications, package footprint, and compliance certifications (ROHS3, REACH unaffected). The primary distinction is product status: FSUSB42UMX-SN00404 is obsolete, while FSUSB42UMX maintains active production status with significantly higher inventory availability (285,300 pcs vs. 25,100 pcs).

For new designs and production transitions, FSUSB42UMX is the appropriate selection. The component maintains full compatibility with existing PCB layouts and electrical requirements while ensuring long-term supply chain viability. Both parts are manufactured by onsemi and comply with current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can FSUSB42UMX directly replace FSUSB42UMX-SN00404 on existing PCBs?

A: Yes. Both components use the identical 10-UFQFN (10-UMLP 1.8x1.4) package footprint and share all critical electrical parameters including on-state resistance, bandwidth, supply voltage range, and operating temperature specifications.

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

A: The FSUSB42UMX-SN00404 is classified as obsolete, while FSUSB42UMX maintains active product status. The electrical and mechanical specifications are equivalent. FSUSB42UMX offers superior availability and long-term supply assurance.

Q: Are there compliance differences between the two parts?

A: No. Both components are ROHS3 compliant and REACH unaffected. Regulatory compliance is identical between the two parts.

Q: What packaging options are available for the substitute part?

A: FSUSB42UMX is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements.

Q: Does the channel count difference affect substitution feasibility?

A: The main part features 2 channels while the substitute features 1 channel. Circuit design requirements must accommodate this architectural difference. If 2-channel switching is mandatory, alternative solutions from the broader substitute list should be evaluated.