FUSB300CUCX USB Type-C Controller Equivalent & Substitute Parts

Part Overview

The FUSB300CUCX is a USB Type-C controller IC manufactured by onsemi, designed for USB 3.1 interface applications in a compact 9-WLCSP (1.22x1.22mm) package. This component provides programmable USB Type-C control functionality for power delivery and data communication systems.

The FUSB300CUCX is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for systems utilizing this controller.

Substiute Parts

FUSB300CUCX

onsemiIn Stock: 1344FUSB300CUCX Datasheet

Current PartRFQ

FUSB302UCX

Fairchild SemiconductorIn Stock: 35353FUSB302UCX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FUSB300CUCX is determined by the following critical parameters:

• Package Compatibility: Identical 9-WLCSP (1.22x1.22mm) footprint required for PCB layout compatibility
• Interface Standard: USB 3.1 protocol support mandatory
• Function: USB Type-C controller functionality
• Supply Voltage Range: Must accommodate the system's power supply specifications
• Operating Temperature Range: Must meet or exceed the application's thermal requirements
• Electrical Characteristics: Protocol compliance and interface specifications must align

The FUSB302UCX qualifies as a direct substitute based on matching package geometry, USB 3.1 interface standard, USB Type-C controller function, and compatible electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

FUSB302UCX is the qualified substitute for FUSB300CUCX based on the following engineering criteria:

• Package Compatibility: Both parts utilize identical 9-WLCSP (1.22x1.22mm) footprint, ensuring direct PCB layout compatibility without redesign
• Functional Equivalence: Both components provide USB Type-C controller functionality with USB 3.1 interface support
• Supply Voltage: The FUSB302UCX operates across a wider voltage range (2.8V – 5.5V) compared to the FUSB300CUCX (3.0V – 4.6V), providing enhanced flexibility for various power supply configurations
• Temperature Performance: The FUSB302UCX supports an extended upper operating temperature limit (+85°C vs. +80°C), meeting or exceeding thermal requirements
• Product Status: The FUSB302UCX maintains active product status, ensuring ongoing availability and supply chain continuity
• Regulatory Compliance: Both parts share identical ECCN (EAR99) and HTSUS classifications, maintaining export and compliance consistency

Frequently Asked Questions (FAQ)

Q: Can FUSB302UCX be used as a direct replacement for FUSB300CUCX in existing designs?

A: Yes. Both parts share identical package geometry (9-WLCSP 1.22x1.22mm), USB 3.1 interface standard, and USB Type-C controller function. The FUSB302UCX operates within the FUSB300CUCX supply voltage range and meets thermal requirements. No PCB layout modifications are required.

Q: What are the key differences between these two parts?

A: The primary differences are: (1) FUSB302UCX has a wider supply voltage range (2.8V – 5.5V vs. 3.0V – 4.6V), (2) FUSB302UCX specifies supply current at 25µA, (3) FUSB302UCX supports a higher maximum operating temperature (+85°C vs. +80°C), and (4) FUSB302UCX maintains active product status while FUSB300CUCX is obsolete.

Q: Are there any package or pinout differences?

A: No. Both parts use the identical 9-WLCSP (1.22x1.22mm) package with matching pinout and footprint. Direct substitution is possible without PCB redesign.

Q: Does the wider voltage range of FUSB302UCX affect compatibility?

A: No. The FUSB302UCX voltage range (2.8V – 5.5V) fully encompasses the FUSB300CUCX operating range (3.0V – 4.6V). Systems designed for FUSB300CUCX will operate within the compatible voltage window of FUSB302UCX.

Q: What is the supply current specification for FUSB300CUCX?

A: The supply current for FUSB300CUCX is not specified in the available technical data. The FUSB302UCX specifies 25µA supply current, which may be used as a reference for power budget calculations in substitute applications.

Q: Are regulatory and export classifications identical?

A: Yes. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, ensuring consistent regulatory and export compliance.