FUSB380UCX Equivalent & Substitute Parts

Part Overview

The FUSB380UCX is a USB Type-C interface controller manufactured by onsemi in a 12-WLCSP (1.21x1.67mm) package. This component is classified as a specialized interface IC designed for USB Type-C applications. The product status is obsolete, making identification of equivalent and substitute parts essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

FUSB380UCX

onsemiIn Stock: 1115FUSB380UCX Datasheet

Current PartRFQ

FUSB380CUCX

onsemiIn Stock: 4607FUSB380CUCX Datasheet

MFR RecommendedRFQ

MAX3841ETG+

Analog Devices Inc./Maxim IntegratedIn Stock: 2230MAX3841ETG+ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FUSB380UCX are identified based on the following critical parameters that determine functional and physical compatibility:

Primary Substitution Criteria:

• Interface category and function (USB Type-C controller)
• Supply voltage range compatibility (2.4V ~ 5.5V)
• Package type and form factor (12-WLCSP or equivalent)
• RoHS3 compliance and regulatory alignment
• Moisture sensitivity level (MSL 1)

Substitute Classification:

Direct Equivalent (MFR Recommended): FUSB380CUCX maintains identical electrical specifications, package geometry, and supply voltage range while offering active product status and improved availability.

Functional Alternative (Similar): MAX3841ETG+ provides USB interface functionality but operates within a different voltage range (3V ~ 3.6V) and uses an alternative package format (24-TQFN), requiring design-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: FUSB380CUCX is the manufacturer-recommended substitute. It maintains identical electrical specifications, package dimensions, and supply voltage range. The component is in active production status with confirmed inventory availability (4568 pcs), ensuring long-term supply continuity. No design modifications are required for this substitution.

For Alternative Applications: MAX3841ETG+ is classified as a functional alternative for data transport interface applications. This part operates within a narrower voltage range (3V ~ 3.6V) and uses a larger package footprint (24-TQFN vs. 12-WLCSP). Selection of this alternative requires verification of voltage compatibility with the target power supply architecture and PCB layout accommodation for the increased package size. Both parts maintain ROHS3 compliance and MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can FUSB380CUCX be used as a direct drop-in replacement for FUSB380UCX?

A: Yes. FUSB380CUCX is the manufacturer-recommended equivalent. Both parts share identical supply voltage specifications (2.4V ~ 5.5V), package geometry (12-WLCSP 1.21x1.67mm), and regulatory compliance. No circuit modifications or PCB redesign is necessary.

Q: What are the key differences between FUSB380CUCX and MAX3841ETG+?

A: The primary differences are voltage range and package format. FUSB380CUCX operates at 2.4V ~ 5.5V in a 12-WLCSP package, while MAX3841ETG+ operates at 3V ~ 3.6V in a 24-TQFN package. These differences require design-level evaluation before substitution.

Q: Is the MAX3841ETG+ suitable for direct replacement in existing FUSB380UCX designs?

A: MAX3841ETG+ is not a direct replacement due to voltage range and package incompatibility. Use of this part requires verification that the system power supply operates within the 3V ~ 3.6V range and that PCB layout can accommodate the larger 24-TQFN footprint.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. FUSB380CUCX and MAX3841ETG+ are both ROHS3 compliant with REACH Unaffected status, matching the regulatory profile of the original FUSB380UCX.

Q: What is the moisture sensitivity level for these components?

A: All three parts (FUSB380UCX, FUSB380CUCX, and MAX3841ETG+) have MSL 1 rating, indicating unlimited shelf life under standard storage conditions.