FSUSB30MUX USB Switch IC Equivalent & Substitute Parts

Part Overview

The FSUSB30MUX is a USB Switch IC manufactured by onsemi, designed for USB 2.0 applications requiring single-channel DPDT switching functionality. This part is classified as Obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The FSUSB30MUX operates across a supply voltage range of 3V to 4.3V with an on-state resistance maximum of 10Ohm and supports break-before-make switching with 720MHz bandwidth capability. Surface mount packaging in 10-MSOP format enables integration into compact electronic assemblies.

Substiute Parts

FSUSB30MUX

onsemiIn Stock: 160577FSUSB30MUX Datasheet

Current PartRFQ

FSUSB42MUX

onsemiIn Stock: 65316FSUSB42MUX Datasheet

MFR RecommendedRFQ

NLAS4717MR2G

onsemiIn Stock: 15675NLAS4717MR2G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSUSB30MUX is determined by the following critical parameters: switch circuit topology (DPDT), number of channels (1), package format (10-MSOP), operating temperature range (-40°C ~ 85°C), and USB 2.0 feature support. The supply voltage range, on-state resistance, and bandwidth specifications define performance boundaries within which alternatives must operate.

Two substitute parts are identified:

FSUSB42MUX (Manufacturer Recommended): Maintains identical switch circuit topology (DPDT), channel count (1), package format (10-MSOP), operating temperature range, and USB 2.0 support. This part is classified as Active, ensuring continued availability. The supply voltage range expands to 2.4V ~ 4.4V, and on-state resistance improves to 6.5Ohm maximum, both favorable for compatibility.

NLAS4717MR2G (Similar Alternative): Differs in switch circuit configuration (SPDT with 2 circuits, providing 2:1 multiplexing capability) and on-state resistance (4.6Ohm maximum). While package format and operating temperature range align, this part is Obsolete. The expanded supply voltage range (1.8V ~ 5.5V) and superior electrical characteristics present trade-offs requiring circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

FSUSB42MUX is the primary substitute for FSUSB30MUX applications. This part maintains functional equivalence through identical DPDT switch topology and single-channel configuration while offering Active product status, ensuring long-term supply availability. The expanded supply voltage range (2.4V ~ 4.4V) encompasses the original specification (3V ~ 4.3V), and improved on-state resistance (6.5Ohm versus 10Ohm) provides performance enhancement. Identical bandwidth (720MHz), operating temperature range, package format, and USB 2.0 feature support enable direct substitution in existing designs without circuit modification.

NLAS4717MR2G presents a secondary alternative for applications where its specific characteristics align with design requirements. The SPDT topology with 2:1 multiplexing differs fundamentally from the DPDT single-channel architecture, requiring circuit-level redesign. Superior on-state resistance (4.6Ohm) and expanded supply voltage range (1.8V ~ 5.5V) offer advantages in specific applications, but reduced bandwidth (40MHz versus 720MHz) may limit high-speed USB 2.0 performance. Obsolete status presents supply risk equivalent to the original part.

All three parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature specifications, supporting environmental and regulatory requirements across substitution scenarios.

Frequently Asked Questions (FAQ)

Q: Can FSUSB42MUX directly replace FSUSB30MUX without circuit modification?

A: Yes. FSUSB42MUX maintains identical switch circuit topology (DPDT), channel count (1), package format (10-MSOP), operating temperature range (-40°C ~ 85°C), and USB 2.0 support. The expanded supply voltage range (2.4V ~ 4.4V) is backward-compatible with the original specification (3V ~ 4.3V). Improved on-state resistance (6.5Ohm) provides performance benefit without requiring design changes.

Q: What are the key differences between FSUSB30MUX and NLAS4717MR2G?

A: Switch circuit topology differs fundamentally. FSUSB30MUX implements DPDT (Double-Pole Double-Throw) with single-channel operation, while NLAS4717MR2G provides SPDT (Single-Pole Double-Throw) with 2 circuits enabling 2:1 multiplexing. Bandwidth differs significantly: FSUSB30MUX supports 720MHz, while NLAS4717MR2G operates at 40MHz maximum. On-state resistance improves in NLAS4717MR2G (4.6Ohm versus 10Ohm), but supply voltage range expands (1.8V ~ 5.5V). Circuit redesign is required for NLAS4717MR2G substitution.

Q: Why is FSUSB30MUX classified as Obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. FSUSB42MUX, classified as Active, represents the manufacturer's current-generation equivalent, ensuring ongoing availability and support for new designs and production continuity.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts utilize identical package format: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width). PCB footprint compatibility is maintained across FSUSB30MUX, FSUSB42MUX, and NLAS4717MR2G, enabling physical interchangeability at the component level.

Q: Do all substitute parts meet the same environmental and regulatory requirements?

A: Yes. FSUSB30MUX, FSUSB42MUX, and NLAS4717MR2G all maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and identical operating temperature specifications (-40°C ~ 85°C). All parts are REACH Unaffected and classified under ECCN EAR99, supporting equivalent environmental and regulatory compliance across substitution scenarios.

Q: What is the primary advantage of FSUSB42MUX over FSUSB30MUX?

A: FSUSB42MUX offers Active product status, ensuring continued manufacturer support and supply availability. Additionally, on-state resistance improves to 6.5Ohm (versus 10Ohm), and supply voltage range expands to 2.4V ~ 4.4V, providing enhanced performance and operational flexibility while maintaining functional equivalence.