FSUSB30L10X USB Switch IC Equivalent & Substitute Parts

Part Overview

The FSUSB30L10X is a USB Switch IC manufactured by onsemi, classified as a 1-channel DPDT (Double Pole Double Throw) switch in a 10-MicroPak surface mount package. This component is designed for USB 2.0 applications requiring break-before-make switching functionality. The part is currently listed as obsolete, making identification of equivalent and substitute components necessary for ongoing design support and production continuity.

Substiute Parts

FSUSB30L10X

onsemiIn Stock: 20341FSUSB30L10X Datasheet

Current PartRFQ

FSUSB43L10X

Fairchild SemiconductorIn Stock: 52270FSUSB43L10X Datasheet

SimilarRFQ

TS3USB3000MRSER

Texas InstrumentsIn Stock: 19011TS3USB3000MRSER Datasheet

SimilarRFQ

TS3USB3000RSER

Texas InstrumentsIn Stock: 17163TS3USB3000RSER Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FSUSB30L10X are qualified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Switch circuit type: DPDT (1 channel)
• Package / Case: 10-UFQFN Exposed Pad or equivalent 10-pin micro package
• Voltage supply range: Minimum 3V ~ 4.3V compatibility
• Operating temperature range: -40°C ~ 85°C
• USB 2.0 application support
• Surface mount technology

Secondary Compatibility Factors:

• On-state resistance within acceptable range for USB switching applications
• -3dB bandwidth sufficient for USB 2.0 signal integrity (minimum 720 MHz)
• Break-before-make or bi-directional switching capability
• RoHS3 compliance and MSL rating

The following parts meet these substitution criteria:

1. FSUSB43L10X (Fairchild Semiconductor) - Active product status, identical package, lower on-state resistance
2. TS3USB3000MRSER (Texas Instruments) - Active product status, equivalent package, extended bandwidth capability
3. TS3USB3000RSER (Texas Instruments) - Active product status, equivalent package, extended bandwidth capability

Parameter Comparison

Engineering Selection Recommendations

FSUSB43L10X is the most direct substitute for the FSUSB30L10X. Both parts share identical electrical specifications (3V ~ 4.3V supply, 720 MHz bandwidth, -40°C ~ 85°C operating range) and package configuration (10-UFQFN Exposed Pad, 10-MicroPak™). The FSUSB43L10X offers improved on-state resistance (6.5 Ohm versus 10 Ohm), providing enhanced performance characteristics. This part maintains active product status, ensuring long-term availability and supply chain continuity.

TS3USB3000MRSER and TS3USB3000RSER are functionally equivalent alternatives from Texas Instruments. Both parts support the same DPDT switching topology and USB 2.0 application requirements. Key advantages include extended voltage supply compatibility (2.7V ~ 4.3V versus 3V ~ 4.3V), significantly higher -3dB bandwidth (6.1 GHz versus 720 MHz), and bi-directional switching capability. Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited). The package designation differs slightly (10-UQFN 2.0x1.5 versus 10-MicroPak™), but both are 10-pin micro packages suitable for surface mount applications. Both parts maintain active product status.

All three substitute parts are ROHS3 compliant and suitable for applications requiring environmental and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can FSUSB43L10X directly replace FSUSB30L10X in existing designs?

A: Yes. Both parts are DPDT USB switches in 10-UFQFN Exposed Pad packages with identical supply voltage ranges (3V ~ 4.3V), bandwidth (720 MHz), and operating temperature specifications (-40°C ~ 85°C). The FSUSB43L10X features lower on-state resistance (6.5 Ohm), which is a performance improvement. No design modifications are required.

Q: What is the difference between the TS3USB3000MRSER and TS3USB3000RSER?

A: Both parts are functionally identical USB switch ICs from Texas Instruments with the same electrical specifications. The difference lies in packaging designation: MRSER indicates a specific tape and reel configuration, while RSER indicates an alternative tape and reel format. Selection depends on procurement and assembly requirements.

Q: Are the Texas Instruments TS3USB3000 series parts compatible with the original FSUSB30L10X?

A: Yes, with package considerations. Both TS3USB3000MRSER and TS3USB3000RSER are DPDT USB switches with compatible electrical specifications (2.7V ~ 4.3V supply, -40°C ~ 85°C operating range, USB 2.0 support). The package designation differs (10-UQFN 2.0x1.5 versus 10-MicroPak™), but both are 10-pin micro packages with identical pin counts and surface mount compatibility. PCB footprint verification is required before implementation.

Q: Why do the Texas Instruments parts have higher bandwidth (6.1 GHz) than the original part (720 MHz)?

A: The TS3USB3000 series is designed with extended bandwidth capability, providing additional performance margin for USB 2.0 applications and future-proofing for higher-speed signal integrity. This specification exceeds the minimum requirement for USB 2.0 operation and does not negatively impact compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: FSUSB43L10X compliance status is not specified in available documentation. TS3USB3000MRSER and TS3USB3000RSER are both ROHS3 compliant. Verify RoHS compliance requirements with your procurement or regulatory team before final part selection.

Q: What is the Moisture Sensitivity Level (MSL) for substitute parts?

A: FSUSB43L10X MSL rating is not specified. TS3USB3000MRSER and TS3USB3000RSER both have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage and handling.