The Realtek RTL8305N-CG is a 5-Port 10/100M Fast Ethernet Switch Controller. It is designed for small office/home office (SOHO) applications, providing a cost-effective solution for building a small network with multiple devices. It integrates all the necessary functions of a switch controller into a single chip, simplifying system design and reducing overall cost.

Applications

• SOHO routers and switches
• Desktop switches
• Network Interface Cards (NICs) with multiple ports
• Embedded systems requiring multiple Ethernet ports

Features

• 5-Port 10/100Mbps Fast Ethernet switch controller
• Compliant with IEEE 802.3u standards
• Supports non-blocking wire-speed forwarding
• Integrated address lookup table (ALT) with automatic learning and aging
• Supports VLAN tagging and QoS features
• Store-and-forward architecture
• Supports loop detection and prevention
• Green Ethernet power-saving features

Benefits

• Provides a cost-effective solution for building a small network
• Simplifies system design with its integrated features
• Ensures high-speed data transfer with non-blocking wire-speed forwarding
• Improves network performance with VLAN and QoS support
• Enhances network reliability with loop detection and prevention
• Reduces power consumption with Green Ethernet features

Technical Specifications

The RTL8305N-CG supports both full-duplex and half-duplex operation at 100 Mbps and 10 Mbps. It operates from a 3.3V power supply and includes power-saving features to minimize energy consumption. The chip integrates the MAC and PHY layers for all five ports. It typically comes in a QFN package.

The integrated address lookup table automatically learns and ages MAC addresses, ensuring efficient packet forwarding. The VLAN tagging and QoS features allow for prioritizing network traffic and segmenting the network for improved security and performance. The loop detection and prevention mechanism helps to prevent network loops, enhancing network stability.