[2.0] 8-port 100M switch RTL8309N

This is an 8-port 100M switch (VT2.0), which has been verified and tested for 7*24h (no minor problems have been found so far).
 
If you want to copy the homework directly, please download the bill of materials in the attachment directly! ! !
 
This is the 8-port 100M switch 2.0 version. The RJ45 interface type has changed from the original single network port (with network port transformer) to a 2X4 type combined RJ45 interface
VT1.0: single network port (with network port transformer) 8-port 100M switch RTL8309N
 
VT2.0: 2X4 type combined RJ45 interface (welding skills need to be improved!!!)
 
Chip introduction and debugging:
The chip used is from Realtek. Model RTL8309NB-VB-CG (new) or RTL8309NB-CG (old) In fact, the two chips are the same, but the difference between the new version and the old version is that the new framework has lower power consumption. The reference datasheet is marked with the RTL8309NB-CG chip model.
 
This 8-port 100M switch has an internal LDO input of 3.3V and an output of 1.0V (but there are only a few words about LDO in the datasheet). I guess the usage and instructions are the same as those of my other open source project, the 5-port 100M switch. After all, it is the same company's chip (RTL8305NB-CG datasheet has detailed instructions on the internal LDO).
 
Component selection and main matters:
If you are an electronics enthusiast or a student, then you will have the same components as mine. Don't pick out components that you don't need to buy (such as resistors and capacitors 0603 commonly used 1k 10k 100nf 1uf)
If you have other USB interfaces (such as Type-C female sockets, you can clone them to modify the schematics and PCB by yourself)
If you don't understand anything and have nothing, please purchase directly according to the component list in the attachment! ! !
0603 packaged LED lights do not specify what color to use. If you have other colors, you can solder them yourself! ! !
All components are mainly for saving money! ! !
 
Soldering instructions:
Those marked on the schematic are reserved and do not need to be soldered! ! ! The schematic diagram indicates that it is reserved and does not need to be soldered!!! The schematic diagram indicates that it is reserved and does not need to be soldered!!!
 
Finally, I will post a few pictures of the finished product:
Power consumption diagram:
 
Back view:
 
Demonstration video: Download the demonstration video of the project attachment!!! (It has been placed on the computer case, so it looks a bit dark, please understand!!!)
 
 
My ability is limited and I can only update 1-2 works per month for the time being!!! (In fact, LiChuang can only make boards twice a month)
 
Copyright statement:
Attention! Attention! Attention!
The project is not for any commercial purpose!!! Please comply with the relevant open source agreement!!!
 
If it is useful to you, please like and collect it to support my research and development.
If it is useful to you, please like and collect it to support my research and development.
If it is useful to you, please like and collect it to support my research and development.
(Important things are said three times!!!)