4 layers40.6 × 17.8 mm
2 layers21.1 × 23.9 mm
FUSB302Breakout
Fortinbra/FUSB302BreakoutA minimal breakout board for the FUSB302BMPX — a programmable USB Type-C controller with USB Power Delivery (PD) support from onsemi.
- Size
- 21.1 × 23.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 9
- Pads
- 46
- Tracks, vias
- 69, 15
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 30 Mar 2025
- Updated
- 18 Jun 2026
Overview
FUSB302Breakout is an open-source printed circuit board by Fortinbra, from the Fortinbra/FUSB302Breakout repository on GitHub, published under the MIT licence. It is a 2-layer board of 21.1 × 23.9 mm with 11 parts on 9 nets, routed with 69 tracks and 15 vias.
It is built around the FUSB302BMPX. Its parts include 6 capacitors, 3 resistors, 1 IC and 1 connector.
Main components
1README
README.mdFUSB302Breakout
A minimal breakout board for the FUSB302BMPX — a programmable USB Type-C controller with USB Power Delivery (PD) support from onsemi. The board exposes the chip's I²C interface, interrupt line, and all USB Type-C signals on a 2.54 mm pin header.
Features
- FUSB302BMPX in WQFN-14 (2.5 × 2.5 mm) package
- I²C interface (fixed address 0x22) with 4.7 kΩ pull-up resistors on SDA and SCL
- Active-low interrupt line (INT_N) with pull-up resistor
- CC1 and CC2 lines broken out for cable orientation detection and PD communication
- VBUS and VCONN pins broken out
- Decoupling capacitors on VDD (100 nF + 1 µF)
- Bulk capacitance on VCONN rail
- 1.6 mm two-layer PCB
Bill of Materials
| Reference | Value | Footprint |
|---|---|---|
| U1 | FUSB302BMPX | WQFN-14-1EP, 2.5 × 2.5 mm, 0.5 mm pitch |
| R1, R2, R3 | 4.7 kΩ | 0603 |
| C3, C5 | 100 nF | 0603 |
| C4 | 1 µF | 0603 |
| C6 | 220 µF | 1206 (electrolytic / large MLCC) |
| C1, C2 | 600 pF | Radial THT, 4 mm diameter |
| J3 | 1×9 pin header | 2.54 mm pitch |
Getting Started
- Supply 3.3 V to the VDD pin and connect GND.
- Connect SDA and SCL to your microcontroller's I²C bus. The board includes 4.7 kΩ pull-ups, so no external pull-ups are needed unless the bus already has them.
- Optionally connect INT to a GPIO to receive interrupts from the FUSB302.
- Route CC1 and CC2 to your USB Type-C connector's CC pins.
- Connect VBUS and VCONN to the corresponding rails of your USB Type-C connector.
- Communicate with the chip over I²C at address 0x22.
Design Files
All KiCad 10 source files are located in src/.
License
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 4.7k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3 |
| 2 | 0.1uf | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C5 |
| 2 | 600pf | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C1, C2 |
| 1 | 1uf | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4 |
| 1 | 220uf | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C6 |
| 1 | Conn_01x09 | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J3 |
| 1 | FUSB302BMPX | Package_DFN_QFN:WQFN-14-1EP_2.5x2.5mm_P0.5mm_EP1.45x1.45mm | U1 |
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Questions
How big is the FUSB302Breakout PCB?
It measures 21.1 × 23.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the FUSB302Breakout use?
11 parts, built around the FUSB302BMPX. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the FUSB302Breakout KiCad files?
From the Fortinbra/FUSB302Breakout repository on GitHub, at the commit this page was made from: the board is src/FUSB302Breakout.kicad_pcb and its schematic src/FUSB302Breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the FUSB302Breakout design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).