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onsemi FUSB302BUCX
- Part No.:
- FUSB302BUCX
- Manufacturer:
- onsemi
- Category:
- Controllers
- Package:
- 9-UFBGA, WLCSP
- Datasheet:
-
FUSB302BUCX.pdf
- Description:
- IC USB TYPE C CTLR PROGR 9WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:8,440
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Product details
Overview
FUSB302BUCX from onsemi is a USB Type-C port controller IC implementing BMC physical layer, CC detection, DRP toggle logic, VCONN switching, and USB Power Delivery 2.0 protocol support. It operates from 2.7–5.5 V, consumes 25 µA in toggle standby mode, and integrates 48-byte Tx/Rx FIFOs for PD packet handling. It enables dual-role port functionality in compact portable devices requiring USB-C connectivity with up to 100 W power negotiation.
For engineers reviewing the FUSB302BUCX datasheet, pinout, applications, or equivalent options, key selection criteria include its 9-ball WLCSP package, I²C slave address 0x42 (R/W), BMC timing compliance per USB PD 2.0, VCONN current capability up to 560 mA, and integrated DAC-based CC voltage measurement with 42 mV/step resolution.
Technical Context
The FUSB302BUCX implements a full BMC physical layer with 4B5B encoding/decoding, CRC32 generation and checking, and automatic GoodCRC response when AUTO_CRC is enabled. Its dual-role port (DRP) behavior is controlled via TOGGLE register bit with configurable tTOG1 (30–60 ms) and tTOG2 (20–40 ms) timing windows.
CC detection uses programmable DAC-based comparators (BC_LVL[1:0]) with hysteresis control (vBC_LVLhys = 20 mV), supporting Ra (5.1 kΩ), Rd (5.1 kΩ), and Rp pull-up configurations. VCONN switching includes over-current protection (800 mA typical), thermal shutdown at 145 °C, and soft-start (1.5 ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Package | 9-ball WLCSP (1.215 mm × 1.260 mm, 0.4 mm pitch), Case 567TN |
| Supply Voltage (VDD) | 2.7–5.5 V - supports direct connection to 3.3 V or 5 V system rails |
| VBUS Detection Range | 4.0–21.0 V - enables robust attach/detach detection across USB PD voltage profiles |
| I²C Interface | Fast Mode Plus up to 1 MHz - allows high-speed register access without bus contention |
| VCONN Output Current | 560 mA max - powers full-featured USB-C cables and accessories compliant with USB 3.1 spec |
| CC Measurement Resolution | 42 mV per MDAC step - enables precise Ra/Rd/Rp identification and orientation detection |
| PD Packet FIFO | 48-byte Tx + 80-byte Rx - accommodates full SOP/SOP'/SOP'' packets including headers and CRC |
Pinout & Package
9-ball Wafer-level Chip Scale Package (WLCSP), 0.4 mm pitch, top view marking "H4", thermal pads connected to GND on bottom side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CC1 | Configuration Channel 1 | Bi-directional BMC I/O for cable orientation detection, Rp/Rd sensing, and PD communication |
| CC2 | Configuration Channel 2 | Bi-directional BMC I/O mirroring CC1; used for alternate orientation and accessory detection |
| VBUS | Power Input | OVP-protected input for attach/detach detection when operating as sink; monitors host-supplied power |
| VCONN | VCONN Power Switch | Regulated output switched to CC1 or CC2 to power active cables and adapters (up to 560 mA) |
| VDD | Supply Voltage | Main power rail (2.7–5.5 V); powers internal logic, BMC PHY, and measurement blocks |
| GND | Ground Reference | System ground reference; two dedicated balls for low-impedance return and thermal dissipation |
| INT_N | Interrupt Output | Active-low open-drain signal indicating status changes (e.g., I_VBUSOK, I_TOGDONE, I_BC_LVL) |
| SCL | I²C Clock Input | Input for synchronous serial interface; supports Fast Mode Plus (≤1 MHz) |
| SDA | I²C Data I/O | Open-drain bidirectional data line; requires external pull-up to VDD or I²C bus voltage |
Key Features
| Feature | Design Value |
|---|---|
| USB PD 2.0 Compliance | Full BMC PHY with CRC32, 4B5B, automatic GoodCRC response, and retry/hard-reset handling per spec |
| DRP Toggle Automation | Hardware-controlled role swap with configurable tTOG1/tTOG2 timing and low-power disable state |
| VCONN Switch Protection | Integrated OCP (800 mA typ), thermal shutdown (145 °C), and soft-start (1.5 ms) for safe accessory powering |
| Programmable CC Thresholds | DAC-based BC_LVL comparators with 42 mV/step resolution and user-configurable hysteresis |
| Low-Power Operation | 25 µA standby current in toggle mode; <5 µA disabled current - extends battery life in portable systems |
Applications
| Smartphone Charging Port | USB-C Docking Station |
|---|---|
Use Scenario: Mobile phone implementing dual-role USB-C port for charging, data, and display output. IC Role / Device Role / Timing Role: FUSB302BUCX detects cable insertion/orientation, negotiates power role (SRC/SNK), enables VCONN for active cables, and handles PD messaging. Use Value: Enables seamless 100 W power delivery and DisplayPort Alt Mode support using single compact WLCSP device. | Use Scenario: Multi-port desktop dock providing host-side USB-C connectivity to laptop, peripherals, and displays. IC Role / Device Role / Timing Role: FUSB302BUCX acts as upstream-facing DRP controller, managing VBUS sourcing, CC signaling, and BMC PD negotiation with attached devices. Use Value: Supports simultaneous PD contract establishment, VCONN power delivery, and accessory detection without external logic. |
| Portable Power Bank | USB-C Monitor Hub |
Use Scenario: Compact battery-powered bank offering bi-directional charging via USB-C. IC Role / Device Role / Timing Role: FUSB302BUCX toggles between source and sink roles based on cable attach, measures VBUS, and controls power path switches. Use Value: Achieves true dual-role operation with <25 µA toggle current, minimizing quiescent drain on Li-ion cells. | Use Scenario: Monitor-integrated hub delivering video, USB data, and power via single USB-C uplink. IC Role / Device Role / Timing Role: FUSB302BUCX manages downstream port CC detection, VCONN supply to connected peripherals, and PD policy engine handshaking. Use Value: Integrates BMC PHY, DRP logic, and VCONN switch into 1.26 mm × 1.215 mm footprint - critical for space-constrained PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB Type-C port controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STUSB4500QTR | Integrated 3.3 V LDO; no VCONN switch; supports USB PD 3.0; 16-pin QFN | Lacks VCONN capability; requires external VCONN driver for full-featured cables | Select when PD 3.0 features (e.g., PPS) are required and VCONN is not needed |
| TUSB320LAIRTER | Fixed SRC/SNK mode only; no DRP toggle; 10-pin WSON; no integrated PD protocol engine | Requires external MCU for PD messaging; limited to static role assignment | Select for cost-sensitive, single-role designs where full PD stack resides in host processor |
Compared with STUSB4500QTR and TUSB320LAIRTER, the FUSB302BUCX uniquely combines DRP toggle automation, integrated VCONN switching, and full BMC PD 2.0 protocol handling in a 9-ball WLCSP - making it optimal for space-constrained dual-role applications requiring full USB-C feature set.
Availability
FUSB302BUCX is available at Aetrix Electronics and suitable for smartphone charging ports, USB-C docking stations, and portable power banks requiring stable component supply, automotive-grade temperature range (−40°C to +85°C), and long-term lifecycle availability.
Supply support for FUSB302BUCX 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The FUSB302BUCX belongs to onsemi's USB Type-C port controller product line, designed specifically to simplify implementation of USB-C connectivity with integrated BMC PHY, DRP logic, VCONN switching, and USB PD 2.0 protocol support in space-constrained portable electronics.
FAQ
What is the I²C slave address of the FUSB302BUCX?
The FUSB302BUCX has a fixed 7-bit I²C slave address of 0x42 (0b1000010) for read/write operations. This address is hard-coded and shared across all WLCSP variants (FUSB302BUCX, FUSB302BMPX, FUSB302BVMPX) as confirmed in Table 15 of the datasheet. No external address pins are present, eliminating configuration overhead during system integration.
Does the FUSB302BUCX support USB Power Delivery 3.0?
No, the FUSB302BUCX implements USB PD 2.0 protocol compliance only. It supports SOP, SOP', SOP'' packets, GoodCRC, Hard/Soft Reset, and standard PD message structures defined in Revision 2.0. It does not support PD 3.0 features such as Programmable Power Supply (PPS), Extended Messages, or Fast Role Swap - those require newer controllers like the FUSB304 or STUSB4500.
How does the FUSB302BUCX handle VCONN power delivery to USB-C cables?
The FUSB302BUCX integrates a dedicated VCONN power switch that delivers regulated current to either CC1 or CC2 based on cable orientation. It provides over-current protection (800 mA typical), thermal shutdown at 145 °C, and soft-start (1.5 ms) to prevent inrush. The switch is controlled via VCONN_CC1/VCONN_CC2 bits in Switches0 register (0x02), enabling safe powering of full-featured USB 3.1 cables.
What is the minimum VBUS detection threshold for attach detection in the FUSB302BUCX?
The FUSB302BUCX triggers the I_VBUSOK interrupt when VBUS exceeds 4.0 V (typical), as specified in Table 10 (vVBUSthr parameter). This threshold is fixed and not user-programmable. The device uses an internal DAC-based comparator to monitor VBUS, ensuring reliable attach detection across USB PD voltage ranges (5 V to 20 V).
Can the FUSB302BUCX operate as a pure source or sink without DRP toggle?
Yes, the FUSB302BUCX can be configured for fixed-source or fixed-sink operation by clearing the TOGGLE bit (Control2 register, bit 0). When TOGGLE = 0, the device remains in its initial role (determined by HOST_CUR[1:0] and PU_EN/PDWN settings) indefinitely. This eliminates automatic role swapping while retaining full BMC PD messaging, CC detection, and VCONN control capabilities.
FUSB302BUCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- 9-UFBGA, WLCSP
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Controller
- Interface:
- USB
- Standards:
- USB 3.1
- Voltage - Supply:
- 2.8V ~ 5.5V
- Current - Supply:
- 25µA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 9-WLCSP (1.21x1.26)
- Grade:
- -
- Qualification:
- -
FUSB302BUCX FAQ
1.How can I place an order for FUSB302BUCX through Aetrix?
Please submit a Request for Quotation (RFQ) for FUSB302BUCX 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 FUSB302BUCX reliable?
The price and inventory of FUSB302BUCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FUSB302BUCX is usually 5 days.
3.What payment methods are accepted for FUSB302BUCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FUSB302BUCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FUSB302BUCX?
FUSB302BUCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FUSB302BUCX 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 FUSB302BUCX?
For technical support, including FUSB302BUCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FUSB302BUCX requirements.
6.How does Aetrix verify that FUSB302BUCX is sourced from the original manufacturer or authorized distributors?
All FUSB302BUCX 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 FUSB302BUCX meets industry standards.
7.What is the process for return or replacement of FUSB302BUCX?
All FUSB302BUCX units undergo pre-shipment inspection (PSI). If there is an issue with FUSB302BUCX, 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 FUSB302BUCX part is unused and in its original packaging.
Return procedure for FUSB302BUCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FUSB302BUCX Tags
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