Realtek RTL8211FS-CG Gigabit Ethernet PHY Transceiver RGMII/SGMII Interface Supports Fiber SyncE IEEE1588 QFN-48

RTL8211FS-CG Product Overview

The Realtek RTL8211FS-CG is a highly integrated Gigabit Ethernet precision transceiver (PHY) from Realtek Semiconductor, part of the RTL8211FS series. Housed in a 48-pin QFN (6×6mm) green package, the RTL8211FS-CG is fully compliant with 10Base-T, 100Base-TX, and 1000Base-T IEEE 802.3 standards, providing all the necessary physical layer functions to transmit and receive Ethernet packets over CAT.5 UTP cable. The chip supports both RGMII (Reduced Gigabit Media Independent Interface) and SGMII (Serial Gigabit Media Independent Interface) for MAC connectivity, and can be flexibly configured as SGMII, 1000Base-X, or 100Base-FX. As an upgraded model in the RTL8211F series, the RTL8211FS-CG is manufactured on a 55nm advanced process with ultra-low power consumption, making it an ideal PHY solution for Network Interface Cards (NICs), embedded systems, industrial controls, routers, switches, and various other network devices.

RTL8211FS-CG Key Features

The RTL8211FS-CG embodies Realtek's deep expertise in high-performance Ethernet PHY design through its robust architecture and feature set. It supports 10Mbps, 100Mbps, and 1000Mbps tri-speed auto-negotiation, utilizing advanced DSP technology and Analog Front End (AFE) for high-speed data transmission and reception. The RTL8211FS-CG integrates comprehensive signal processing functions including Crossover Detection & Auto-Correction, polarity correction, adaptive equalization, cross-talk cancellation, echo cancellation, timing recovery, and error correction, ensuring robust transmission and reception even in challenging environments. The chip supports up to 120 meters for CAT.5 cable in 1000Base-T mode. The RTL8211FS-CG supports flexible RGMII signaling voltages (1.5V, 1.8V, 2.5V, and 3.3V), supports 25MHz external crystal or OSC input, and provides a 125MHz clock source for the MAC. The chip also features 3 network status LEDs and programmable LED indication. The RTL8211FS-CG supports IEEE 802.3az-2010 Energy Efficient Ethernet (EEE) and Link Down power saving. The chip integrates built-in switching regulator and LDO, and supports Synchronous Ethernet (SyncE) and IEEE 1588 Precision Time Protocol (PTP) timestamping. The RTL8211FS-CG also supports Fiber interface (1000Base-X/100Base-FX), Fiber-to-UTP Media Converter mode, and SGMII-to-RGMII Bridge mode. The chip features UTP/Fiber Auto Detection, Parallel Detection, and Interrupt function. The RTL8211FS-CG operates from 1.5V, 1.8V, 2.5V, and 3.3V multi-voltage supplies, with an operating temperature range of -40℃ to +85℃, meeting industrial-grade standards.

RTL8211FS-CG Applications

With its highly integrated PHY functionality, flexible interface configuration, and ultra-low power consumption, the RTL8211FS-CG is widely deployed in various networking applications. It is an ideal choice for Network Interface Cards (NICs) for desktops, servers, and laptops. The RTL8211FS-CG is also suitable for routers, switches, and Network Attached Storage (NAS) devices and PoE switches. In embedded systems, the RTL8211FS-CG is commonly used in industrial control systems, IoT devices, and embedded motherboards requiring Ethernet connectivity. The chip is also widely deployed in consumer products such as IP cameras, Digital TVs (DTV), game consoles, printers, and office equipment. The RTL8211FS-CG is also suitable for industrial automation, smart cities, robotics, drones, healthcare, renewable energy, telecom base stations, and controllers.

RTL8211FS-CG Key Advantages

The RTL8211FS-CG stands out as a mature, commercially available Gigabit Ethernet PHY transceiver that strikes an excellent balance between high performance, low power consumption, and flexible configuration. Housed in a 48-pin QFN (6×6mm) compact package, it delivers complete Gigabit PHY functionality while minimizing PCB footprint. The RTL8211FS-CG supports both RGMII and SGMII MAC interfaces, offering maximum flexibility for different SoC and FPGA platforms. The RTL8211FS-CG supports Fiber interface (1000Base-X/100Base-FX), Fiber-to-UTP Media Converter mode, and SGMII-to-RGMII Bridge mode, enabling both copper and fiber network media applications. The RTL8211FS-CG supports IEEE 802.3az Energy Efficient Ethernet (EEE) and Link Down power saving, significantly reducing power consumption during low traffic periods. The RTL8211FS-CG provides full hardware support for SyncE and IEEE 1588 Precision Time Protocol (PTP) , accurately timestamping each PTP packet for applications requiring precise clock synchronization. The RTL8211FS-CG supports 1.5V, 1.8V, 2.5V, and 3.3V RGMII signaling voltages, offering flexible voltage compatibility with different host platforms without external level shifters. Manufactured on a 55nm advanced process, the RTL8211FS-CG delivers ultra-low power consumption. The RTL8211FSI-CG and RTL8211FSI-VS-CG variants are manufactured to industrial-grade standards, supporting a -40℃ to +85℃ wide temperature range for reliable operation in harsh industrial environments. Realtek provides comprehensive driver support and reference designs for the RTL8211FS-CG,offering system integrators and OEMs a highly competitive Gigabit Ethernet PHY solution.

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FAQs:

1 What is the RTL8211FS-CG chip
RTL8211FS-CG is a Gigabit Ethernet physical layer transceiver chip from Realtek mainly used for high speed data transmission between the host controller and the Ethernet network.

2 What package pin count and dimensions does it use
RTL8211FS-CG uses a QFN48 no lead surface mount package with 48 pins and a standard footprint of 6 by 6 millimeters with an exposed thermal pad on the bottom.

3 What network speeds and interfaces does it support
RTL8211FS-CG supports auto negotiation of 10M 100M and 1000M Ethernet speeds and communicates with the host MAC layer via the RGMII Gigabit interface.

4 What are the operating voltage and temperature ranges
For RTL8211FS-CG, the core voltage is typically 1 point 1V or 1 point 2V and the I/O voltage supports configurable 1 point 8V 2 point 5V or 3 point 3V. The industrial grade temperature range is from minus 40 degrees Celsius to plus 85 degrees Celsius.

5 What application scenarios is this chip suitable for
RTL8211FS-CG is widely used in Gigabit routers network switches smart set top boxes industrial control boards and embedded development boards requiring Gigabit wired networking.

6 What hardware network features does it support
RTL8211FS-CG supports Auto MDI X automatic crossover detection eliminating the need to distinguish between straight through and crossover cables. It also supports the IEEE 802 point 3az Energy Efficient Ethernet standard.

7 How should it be connected to the host controller
RTL8211FS-CG connects to the embedded MAC controller of the host CPU MCU or FPGA via the standard RGMII interface for high speed data exchange.

8 What are the PCB design considerations for the QFN package
For RTL8211FS-CG, the thermal pad on the bottom must be grounded to a large copper area on the PCB for heat dissipation and signal quality. Strict length matching and 100 ohm impedance control for RGMII differential traces are also required.

9 What external components are needed
RTL8211FS-CG typically requires an external 25 megahertz crystal oscillator for clock reference and must be used with an Ethernet magnetic isolation transformer and an RJ45 connector at the Ethernet interface.

10 Does this chip support PoE power over Ethernet directly
No it does not. RTL8211FS-CG is solely responsible for data communication. If PoE is required for the system a dedicated PoE power management module must be added to the Ethernet circuit.