RTL8309N-CG

The RTL8309N-CG is a low-power, 9-port 10/100 Ethernet switch controller from Realtek. It integrates 8 MACs, supports auto-negotiation, and features auto MDI/MDIX for simplified cabling.
Key features:
- 9 ports: 8 × 10/100Mbps + 1 × MII/RMII for uplink.
- Store-and-forward architecture with 1K MAC entries.
- QoS support: 4 priority queues with 802.1p/DSCP.
- Energy-efficient Ethernet (EEE) for reduced power consumption.
- VLAN support: Port-based and 802.1Q tagging.
- Loop detection and broadcast storm control.
Applications include SOHO switches, IP cameras, and embedded networking. The RTL8309N-CG is cost-effective, requires minimal external components, and operates at 3.3V.
For details, refer to Realtek’s datasheet.

The RTL8309N-CG is a 9-port 10/100 Ethernet switch controller. Equivalent alternatives include:
- RTL8309SB: Similar 9-port switch with basic features.
- RTL8306N: 6-port variant, suitable for fewer ports.
- KSZ8863RLL: 3-port switch by Microchip with similar functionality.
- IP175CH: 5-port switch by IC Plus.
Check pin compatibility and feature requirements before substitution.

The RTL8309N-CG is a low-power, 9-port 10/100M Ethernet switch controller with the following key features:
- 9-Port Configuration: 8x 10/100M Ethernet ports + 1x MII/RMII uplink port.
- Integrated MAC/PHY: Built-in 10/100M PHYs for all ports.
- Auto-Negotiation: Supports speed/duplex auto-detection.
- Flow Control: IEEE 802.3x flow control and backpressure.
- VLAN Support: Port-based VLAN for traffic segmentation.
- QoS: 4 priority queues with WRR/SP scheduling.
- Energy-Efficient: Supports Green Ethernet (EEE 802.3az).
- Management Options: MII/RMII for CPU interface, optional EEPROM for configuration.
- Low Power: Typically consumes <1.5W.
- Package: 128-pin LQFP.
Ideal for unmanaged switches, IP cameras, and IoT networking.

The RTL8309N-CG is a 9-port 10/100M Ethernet switch controller with an integrated 5-port PHY.
- Pin Count: 128-pin LQFP package.
- Key Functions:
- Supports 9 Ethernet ports (5 integrated PHYs + 4 external MAC/PHY interfaces).
- Auto-negotiation, auto-MDI/MDIX, and QoS (802.1p).
- VLAN support (802.1Q) and port-based traffic control.
- Low power consumption and industrial temperature range support.
It is commonly used in embedded networking applications.

The RTL8309N-CG is manufactured by Realtek Semiconductor Corp., a Taiwanese company specializing in networking and multimedia ICs. Realtek is a leading fabless semiconductor company known for its cost-effective solutions in Ethernet controllers, Wi-Fi chips, audio codecs, and other consumer electronics components. The RTL8309N-CG is a low-power, 9-port 10/100 Ethernet switch controller, commonly used in embedded and networking applications. Realtek serves a broad market, including PC peripherals, IoT, and industrial devices.

The RTL8309N-CG is a low-power, 9-port 10/100M Ethernet switch controller. Its key application areas include:
1. Home/SOHO Networking – Used in routers, gateways, and small switches.
2. Industrial Ethernet – Supports harsh environments in automation and control systems.
3. Embedded Systems – Integrated into IoT devices, smart appliances, and NAS.
4. Surveillance Systems – Connects IP cameras and NVRs in security networks.
5. Legacy Network Upgrades – Provides cost-effective 10/100M switching for older networks.
It features auto-negotiation, QoS, and low power consumption, making it versatile for compact and energy-efficient designs.