FUSB3301MPX

FUSB3301MPX is a USB Type-C port controller (from the FUSB family, originally Fairchild/now Onsemi) used to implement a single USB-C port without a full PD engine. It handles the CC logic, cable orientation detection, role detection (source/sink), and basic current advertisement, plus protection features and an I2C control/status interface.
Key points:
- Provides CC negotiation data and port state, and drives port protection (fault/short-circuit, overvoltage as specified).
- I2C interface for configuring and reading status; suitable to pair with a microcontroller or a PD controller for more advanced USB PD contracts.
- MPX suffix denotes a specific packaging/variant (compact QFN-type package).
Typical applications:
- USB-C charging ports, docking stations, power banks, and USB-C hubs that don’t require a full PD controller.
Bottom line: quick Type-C port implementation with integrated CC logic and protections; PD negotiation handled externally if needed. For exact electrical specs and pinout, see the official datasheet.

Functional equivalents are other USB Type‑C CC/port‑controller ICs. Common substitutes include TI TUSB320/TUSB322, STMicroelectronics STUSB4500 (and STUSB1602 family), Infineon/Cypress CCG1/CCG2 family, and Microchip/MCA’s USB‑C controller chips. Verify pinout, feature set (DRP/CC, PD support, VCONN/FETs) and firmware/PCB compatibility before replacing.

Here are the typical features of the FUSB3301MPX (USB Type-C Port Controller):
- USB Type-C port controller with dual‑role port (DRP) capability
- CC1/CC2 detection for plug orientation and cable/charger detection
- VCONN control for active cables
- Fast role swap (FRS) and dead-battery support
- I2C interface for host MCU control and status monitoring
- Drives external MOSFETs to implement the VBUS power path
- Protection and safety: overcurrent/short-circuit protection, UVLO, fault/interrupt reporting
- VBUS voltage monitoring and status reporting
- Compact MPX package (small 8‑pin footprint) with low standby power
- Wide operating supply range (typical 2.7–5.5 V) and suitable for USB-C without PD or with PD via an external controller
Note: Exact current advertisement, PD compatibility, and electrical specs should be confirmed from the latest datasheet for your specific application.

- Manufacturer: ON Semiconductor (ON Semiconductor Corp.), often branded ON Semi.
- What kind of company: An American multinational semiconductor company that designs, manufactures, and sells energy-efficient integrated circuits and systems for automotive, industrial, communications, and consumer electronics.

FUSB3301MPX is a USB Type-C Port Controller with Power Delivery negotiation. Typical applications:
- USB-C charging ports in chargers, power banks, and adapters
- Front-end controller for laptops, tablets, smartphones, and 2-in-1s
- USB-C hubs, docking stations, and accessories requiring PD/role swap
- USB-C displays and peripherals using power delivery and alternate modes
- VBUS, CC and cable-orientation protection in consumer electronics
Notes: used wherever safe VBUS control, CC negotiation and PD-driven power negotiation are needed for USB‑C ports.

16-pin QFN package (4.0 x 4.0 mm) with exposed pad.