RTL8152B Ultra-small USB Wired Network Adapter Module

Design requirements dictate
that onboard computer platforms such as NUCs or Nvidia NX typically have only one wired network port. When multiple devices requiring network communication are needed, a USB network adapter is often added for expansion. Existing USB wired network adapters are primarily designed for laptops, which presents space and weight waste issues on small robot platforms (such as ultra-small drones with wheelbases of only 250mm or 180mm). Therefore, the existing USB network adapter design based on the RTL8152B was significantly simplified and its size reduced, removing unnecessary Flash, LED, and transformer functions, and using two SH1.0 ports for USB 2.0 and four-wire 100Mbps network communication respectively.
Dimensions: 20.3mm * 7.5mm * 3.7mm (using 0.8mm board thickness)
Weight: ~0.55g (excluding cable)
 
Comparison with common USB wired network cards and RJ45 connectors
 
Test method:
You can make a USB to SH1.0 4P and an RJ45 to SH1.0 4P adapter yourself and test it on a personal computer first. Taking Win10 as an example, the new network card can be directly recognized by the computer after normal wiring.
Note: Connect the RX of the wired network card to the TX of the RJ45, and connect the TX of the wired network card to the RX of the RJ45.
 
Application example:
Nvidia Orin NX connects to Livox Mid-360 LiDAR and SIYI A8 mini gimbal at the same time.
 
Note:

Due to the size, the network port uses capacitive isolation instead of electromagnetic isolation, so it is not suitable for long-distance communication (>1m).
According to the RTL8152B datasheet, Pin An 18-pin pull-up resistor is required when using a 25MHz crystal oscillator, while a pull-down resistor is required when using a 48MHz crystal oscillator.
Because there is no flash memory, there is a limit to the number of times MAC address and other configuration settings can be changed. The product comes with a default MAC address. For plug-and-play
USB to SH1.0 4P and Ethernet to SH1.0 4P adapters, you need to make your own wiring; the wiring sequence is silkscreened on the back of the PCB.