【Colorful silk screen】USB2.0 HUB based on CH334R

(The rendering is for reference only)
USB HUB controller chip CH334
B station video,
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https://www.bilibili.com/video/BV1vv4y1475W/
Update log
2023-02-11 Color silk screen version verification completed
2023-02-01 First release
Overview
CH334 and CH335 are 4-port USB HUB controller chips that comply with the USB2.0 protocol specification. The upstream port supports USB2.0 high speed and full speed, and the downstream port supports USB2.0 high speed 480Mbps, full speed 12Mbps and low speed 1.5Mbps. It not only supports the low-cost STT mode (a single TT time-sharing scheduling 4 downstream ports), but also supports the high-performance MTT mode (4 TTs each correspond to 1 port, concurrent processing). Industrial-grade design, streamlined peripherals, can be applied to computer and industrial computer motherboards, peripherals, embedded systems, etc.
Project Description
This project is based on the USB2.0 HUB chip in CH334R QSOP-16 package launched by Nanjing Qinheng Microelectronics Co., Ltd. It supports MTT mode. Compared with the traditional SL2.1 and SL2.2S, it improves the transmission efficiency in full-speed and low-speed modes. At the same time, it solves the problem that the SL2.2S connected to the USB CDC serial port cannot be opened.
Advantages
4-port USB hub, providing 4 USB2.0 downstream ports, backward compatible with USB1.1 protocol specifications
Support high-performance MTT mode, providing independent TT for each port to achieve full-bandwidth concurrent transmission, and the total bandwidth is 4 times that of STT
SY6280 front-end overvoltage and overcurrent protection device to protect the computer USB port
Structure Description
USB TYPE-C input
CH334R USB2.0 HUB master control, with internal 3.3V LDO
SY6280 protection chip to provide power to the subsequent USB
Four USB2.0 female
color silk screen versions
have been completed and can be viewed in the display pictures.
Display pictures