Industrial Embedded 4-Port USB 2.0 Hub OEM Board - Sealevel
ELUTENG PCIE USB 3.0 Card 4 Ports PCI Expree to USB Expansion Card Super Speed 5Gbps
USBHUB USB2.0 HUB 4 port controller USB extension module GL850G chip 4 USBHUB|Integrated Circuits| - AliExpress
DC 5V USB HUB USB2.0 Hub Concentrator 4 Female USB Expansion Board Module Four USB Expansion Interface 4 port Controller|Replacement Parts & Accessories| - AliExpress
Usb 2.0 Hub 4-port Usb High Speed Controller Module For Arduino - Docking Stations & Usb Hubs - AliExpress
TIDA-00288 reference design | TI.com
1pcs CJMCU-204 Hi-Speed USB 2.0 HUB DC Controller 4 Port USB Hub 5V 500mA | eBay
File:VIA Labs VL812 USB 3.0 4-Port Hub - Board with Coin.jpg - Wikimedia Commons
Amazon.com: SUNKY PS4 / PS4 Slim / PS4 Pro USB Hub, 4-Port USB 3.0 Hub High Speed Splitter Expansion Controller Charger Adapter for Sony Playstation 4 Slim Pro / PS3 / Xbox
USB553xB 2/3/4/7-Port USB Hub Controller - Microchip Technology | Mouser
威鋒電子
FE1.1 USB 2.0 High Speed 4-Port Hub Controller | Terminus USA | Fabless IC Design House
FL5502 - 4-Port USB 3.2 Gen 2 Hub Controller - Parade Technologies, Ltd.
FE8.1 USB2.0 High Speed 4 port hub controller | Terminus USA | Fabless IC Design House
USB Hubs | Microchip Technology
Quantum 4 Ports USB Hub Circuit Diagram IC - YouTube