【Verified】 USB Docking Station 2.0

Note: It is USB2.0, not USB3.0, and it has been verified to be effective.
The transmission speed is between 6MB/S and 8MB/S, which is comparable to the speed of the expansion dock I bought on Taobao before, but the production cost is much cheaper than buying it directly.
1. SL2.1A is a highly integrated, high-performance, low-power USB2.0 hub master chip; the chip adopts STT technology, single power supply mode, the chip power supply voltage is 5v, internal integrated 5V to 3.3V, only need to add filter capacitor to the external power supply; the chip comes with a reset circuit, and the low-power technology makes it more outstanding. The chip has its own crystal, and the official manual recommends using a 12MHZ external crystal oscillator, which can make the circuit work more stably.
2. The reference wiring diagram provided by the official:
3. A few points about the pitfalls I stepped on during the production process are shared with you to avoid repeating my mistakes and causing production failure:
(1) The Type-c interface must use 16Pin. For the specific reasons, please refer to the article of the big brother in CSDN: Type-C
(2) The routing of DM and DP in the circuit design must use differential pair routing.
These two mistakes were made in the first version, which caused the first version to be scrapped. After consulting the information, I made the current second version. I would like to thank Jia Li Chuang for its free proofing twice a month, so that my DIY can meet you, Jia Li Chuang YYDS! ! ! ! !
4. This part uses a plug-in because I have inventory in hand. If you want to replicate it, you can directly order the PCB or modify this part to SMD components and then place an order.
5. An interactive BOOM table that is easy to solder. You can download it in the attachment.