Project Overview

This project is a 4-port + 1-port Gigabit Ethernet switch, utilizing the Realtek RTL8367S chipset. It integrates a native SGMII 1.25G optical interface leading to an SFP port, making it ideal for high-speed network connections. The design employs a cost-effective double-layer PCB layout with the minimum number of peripheral components to reduce expenses.

Key Features

Single-chip 5+2 port 10/100/1000 Mbps non-blocking switch architecture

Integrated 5-Port 10/100/1000Base-T PHY for efficient connectivity

Each port supports full-duplex 10/100/1000 Mbps communication

High-speed serial SGMII interface (1.25GHz) for the optical port

Supports jumbo packet forwarding with a maximum length of 9216 bytes at wire speed

Includes Realtek Cable Test (RTCT) functionality for enhanced diagnostics

Schematic Overview:

1. DC-DC Section: This section uses the MT2492 DC-DC converter to step down the 5V USB input to 3.3V. The MT2492 is housed in a compact SOT23 package, and its peripheral circuit design is simple, eliminating the need for a freewheeling diode. This approach offers a small footprint and reduces cost.

2. 1.1V Power Supply Section:

For the 1.1V power supply, the design utilizes the on-chip integrated DC-DC output, complemented by an external 2.2uH inductor. It's essential to include a 10uF capacitor in the circuit, as it cannot be omitted for proper functionality.

Software Descript_ion:

The firmware for this project is provided in the attached file "RTL8367S-4GE+SFP.bin." To upload the firmware, use a CH341A programmer. Please note that this firmware is protected under REALTEK copyright and is intended for non-commercial use only.

2D and 3D preview

Shell Design

The updated shell has been verified for correct sizing, and you can choose between acrylic cutting or 3D printing based on your preference. The model file is attached for reference.

• Stud Size: M3*5+6
• Acrylic Thickness: 2mm
• Fan Mounting: Reserved holes for a 25257mm (2507) fan

Sponsorship Request

Given PCBWay's strong commitment to supporting innovative electronic projects, I would like to request your generous sponsorship for the fabrication of the PCBs for this project. Your sponsorship would enable me to produce high-quality, professional-grade boards that are crucial to the success of this design.