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onsemi FUSB380CUCX
- Part No.:
- FUSB380CUCX
- Manufacturer:
- onsemi
- Category:
- Controllers
- Package:
- 12-UFBGA, WLCSP
- Datasheet:
-
FUSB380CUCX.pdf
- Description:
- USB TYPEC CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:373
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Product details
Overview
FUSB380CUCX from onsemi is a USB Type-C passive cable marker IC implementing the USB Power Delivery 3.0 protocol layer and device policy engine. It provides 28 V-tolerant CC and VCONN interfaces, operates from 2.4 V to 5.5 V on VCONN, supports SOP' signaling, and features automatic Ra weakening for power reduction in USB-C cables.
For engineers reviewing the FUSB380CUCX datasheet, pinout, applications, or equivalent options, key selection criteria include VCONN voltage range (2.4–5.5 V), 28 V tolerance on CC/VCONN pins, field-programmable cable identity (up to 5 writes), WLCSP12 package footprint (1.21 mm × 1.67 mm), and USB PD 2.0/3.0 certification compliance.
Technical Context
The FUSB380CUCX integrates a full USB PD PHY, BMC transceiver, and state machine for autonomous e-marker operation in passive USB-C cables. It implements dual VCONN termination paths (VCONN1/VCONN2) with integrated isolation and dynamic RA-to-RA_WEAK transition triggered after tVCONNStable (10–50 ms).
Its field-programmable memory stores customizable Discover Identity responses-including VID/PID, hardware/firmware versions, cable latency, termination type, and serial number-accessible via Vendor Defined Messages. SOP' signaling support enables communication with host controllers without requiring external microcontroller intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCONN Range | 2.4 V to 5.5 V - Enables reliable operation across wide input variation including low-power VCONN sources. |
| CC/VCONN Tolerance | 28 V - Protects against VBUS shorting events during hot-plug or fault conditions in USB-C connectors. |
| Package | WLCSP12 (1.21 mm × 1.67 mm × 0.586 mm) - Ultra-compact footprint suitable for space-constrained cable plug assemblies. |
| Operating Temp | −40 °C to +85 °C - Qualified for industrial and consumer-grade cable environments including automotive cabin routing. |
| RA_WEAK Value | 18 kΩ to 22 kΩ - Ensures controlled VCONN discharge within ≤230 ms under 10 µF load per USB-C spec requirements. |
| Program Cycles | 5× - Supports post-manufacture customization of cable identity data without requiring dedicated programming infrastructure. |
| BMC Timing | tInterFrameGap ≥25 µs - Guarantees compliant inter-packet spacing to prevent receiver synchronization loss in high-noise cable environments. |
Pinout & Package
Package: 12-ball Wafer-Level Chip-Scale Package (WLCSP), case 567VZ, marking H6KK XYZ, dimensions 1.21 mm × 1.67 mm × 0.586 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1, A2, B1, B2, B3, C1, C2 | Test Pins / NC | All test pins (T1–T6) and NC are unconnected in final application; no external connection required. |
| A3, D2 | GND | Dual ground balls provide low-inductance return path for BMC signaling and VCONN current return. |
| C3 | CC | 28 V-tolerant Configuration Channel I/O - bidirectional BMC interface for PD communication and cable ID exchange. |
| D1, D3 | VCONN2 / VCONN1 | Independent 28 V-tolerant VCONN power inputs - enable dual-plug architecture without VCONN routing through cable. |
Key Features
| Feature | Design Value |
|---|---|
| USB PD 3.0 Protocol Stack | Fully integrated BMC PHY and PD state machine eliminates need for external controller in passive cable marker applications. |
| Dual VCONN Termination | Independent VCONN1/VCONN2 inputs with internal isolation allow use in either single-eMarker-through-cable or dual-eMarker-no-VCONN-routing topologies. |
| Field Programmability | 5× reprogrammable non-volatile memory stores full Discover Identity VDOs including VID, PID, firmware version, and cable serial number. |
| Automatic Ra Weakening | Dynamic switch from 800–1200 kΩ RA to 18–22 kΩ RA_WEAK upon valid VCONN detection ensures fast, compliant VCONN discharge post-detach. |
| SOP' Signaling Support | Native handling of SOP' packets enables direct communication with upstream port controllers without protocol translation layers. |
Applications
| USB-C Passive Cable Assembly | High-Speed Data Cable Certification |
|---|---|
Use Scenario: Manufacturing of certified USB-C to USB-C passive cables rated for USB 3.2 Gen 2 (10 Gbps) or Thunderbolt 3. IC Role / Device Role / Timing Role: Autonomous e-marker providing cable identity, capabilities, and VCONN management per USB Type-C specification. Use Value: Enables compliance with USB-IF e-Marker requirements while reducing BOM count by eliminating external MCU and discrete protection components. | Use Scenario: Integration into premium HDMI-to-USB-C or DisplayPort-to-USB-C adapter cables requiring modal capability reporting. IC Role / Device Role / Timing Role: Cable-side PD responder that reports supported alternate modes and signal integrity parameters via Discover Identity VDOs. Use Value: Allows host systems to validate cable bandwidth and negotiate appropriate link training, preventing handshake failures or degraded video performance. |
| Industrial USB-C Interconnect | Automotive In-Cabin Charging Cable |
Use Scenario: Ruggedized USB-C cables used in factory automation equipment requiring extended temperature operation and ESD resilience. IC Role / Device Role / Timing Role: Robust cable marker with 4.5 kV HBM ESD rating on CC/VCONN pins and −40 °C to +85 °C operating range. Use Value: Maintains reliable PD communication and cable authentication in electrically noisy industrial environments with frequent connector mating cycles. | Use Scenario: OEM-supplied vehicle charging cables supporting USB PD up to 100 W with authenticated power delivery. IC Role / Device Role / Timing Role: Safety-critical cable identity manager ensuring only certified cables draw high-current VBUS from automotive USB-C ports. Use Value: Prevents overcurrent faults and thermal runaway by enforcing strict cable capability reporting before enabling >3 A VBUS sourcing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-C passive cable marker applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TUSB1146IRGTR | Active redriver with integrated e-marker; requires external VDD supply; larger QFN-24 package (4 mm × 4 mm). | Targeted at active cables needing signal conditioning; not drop-in for passive-only designs. | Select when cable length exceeds passive limits and signal integrity restoration is required alongside e-marking. |
| STUSB4500LQTR | USB PD 3.0 controller with e-marker support but no integrated VCONN termination; requires external Ra network and level-shifting. | Higher BOM count and layout complexity; lacks native 28 V tolerance on CC/VCONN pins. | Choose only if existing design already uses ST's ecosystem and can accommodate additional discrete protection components. |
Compared with TI TUSB1146IRGTR and STUSB4500LQTR, the FUSB380CUCX delivers a fully self-contained, ultra-small-footprint solution optimized exclusively for passive cable e-marking - eliminating external components, simplifying layout, and reducing total system cost without compromising USB-IF certification readiness.
Availability
FUSB380CUCX is available at Aetrix Electronics and suitable for USB-C passive cable assembly, high-speed data cable certification, and industrial USB-C interconnect applications requiring stable component supply and long-term lifecycle support.
Supply support for FUSB380CUCX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The FUSB380CUCX belongs to onsemi's USB Type-C and Power Delivery product line, engineered specifically to simplify and miniaturize e-marker implementation in passive USB-C cables while meeting full USB-IF compliance requirements.
FAQ
What is the primary function of the FUSB380CUCX in a USB-C cable?
The FUSB380CUCX serves as an autonomous USB-C passive cable e-marker IC. It implements the full USB PD 3.0 protocol stack to authenticate cable identity, report capabilities (e.g., speed, power, latency), manage VCONN power, and ensure compliance with USB-IF specifications. The FUSB380CUCX performs these functions without external microcontroller support, making it ideal for compact, cost-sensitive passive cable designs.
Does the FUSB380CUCX support both VCONN1 and VCONN2 simultaneously?
Yes, the FUSB380CUCX supports independent VCONN1 and VCONN2 inputs with integrated isolation between them. This allows flexible deployment - either one FUSB380CUCX per cable using VCONN-through architecture, or two FUSB380CUCX devices (one in each plug) eliminating the need to route VCONN across the cable. Both configurations are validated in the official application diagrams.
What is the maximum number of times the FUSB380CUCX can be field-programmed?
According to the datasheet, the FUSB380CUCX supports up to five field-programming cycles via Vendor Defined Messages. Each cycle allows full customization of Discover Identity VDOs, including VID/PID, firmware/hardware versions, cable serial number, and mode support. Programming occurs in-system and does not require special test equipment beyond standard USB-PD communication.
How does the FUSB380CUCX handle VCONN discharge after cable detachment?
Upon cable detachment, the FUSB380CUCX detects VCONN voltage decay below the vVCONNDiscconnect threshold (0.8–2.4 V) and automatically switches from RA (800–1200 kΩ) to RA_WEAK (18–22 kΩ). This ensures VCONN discharges to ≤800 mV within ≤230 ms under a 10 µF load - satisfying USB-C specification requirements for safe hot-unplug behavior. The FUSB380CUCX then re-applies RA once VCONN drops below the reconnect threshold.
Is the FUSB380CUCX RoHS compliant and lead-free?
Yes, the FUSB380CUCX is Pb-free, halogen-free/BFR-free, and RoHS compliant as confirmed in the official datasheet. The WLCSP12 package uses lead-free solder bump technology and meets all applicable environmental regulations for commercial and industrial electronics manufacturing.
FUSB380CUCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 12-UFBGA, WLCSP
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- -
- Interface:
- USB
- Standards:
- USB 3.0
- Voltage - Supply:
- 2.4V ~ 5.5V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-WLCSP (1.21x1.67)
- Grade:
- -
- Qualification:
- -
FUSB380CUCX FAQ
1.How can I place an order for FUSB380CUCX through Aetrix?
Please submit a Request for Quotation (RFQ) for FUSB380CUCX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for FUSB380CUCX reliable?
The price and inventory of FUSB380CUCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FUSB380CUCX is usually 5 days.
3.What payment methods are accepted for FUSB380CUCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FUSB380CUCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FUSB380CUCX?
FUSB380CUCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FUSB380CUCX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for FUSB380CUCX?
For technical support, including FUSB380CUCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FUSB380CUCX requirements.
6.How does Aetrix verify that FUSB380CUCX is sourced from the original manufacturer or authorized distributors?
All FUSB380CUCX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FUSB380CUCX meets industry standards.
7.What is the process for return or replacement of FUSB380CUCX?
All FUSB380CUCX units undergo pre-shipment inspection (PSI). If there is an issue with FUSB380CUCX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The FUSB380CUCX part is unused and in its original packaging.
Return procedure for FUSB380CUCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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