The Realtek RTL8211F-CG/RTL8211FD-CG/RTL8211FI-CG/RTL8211FDI-CG is a highly integrated Ethernet transceiver that complies with 10Base-T, 100Base-TX, and 1000Base-T IEEE 802.3 standards. It provides all the necessary physical layer_ functions to transmit and receive Ethernet packets over CAT.5 UTP cable. The RTL8211FI and RTL8211FDI are manufactured to industrial grade standards.
The RTL8211F(I)/RTL8211FD(I) uses state-of-the-art DSP technology and an Analog Front End (AFE) to enable high-speed data transmission and reception over UTP cable. Functions such as Crossover Detection & Auto-Correction, polarity correction, adaptive equalization, cross-talk cancellation, echo cancellation, timing recovery, and error correction are implemented in the RTL8211F(I)/RTL8211FD(I) to provide robust transmission and reception capabilities at 10Mbps, 100Mbps, or 1000Mbps.

Data transfer between MAC and PHY is via the Reduced Gigabit Media Independent Interface (RGMII) for 1000Base-T, 10Base-T, and 100Base-TX. The RTL8211F(I)/RTL8211FD(I) supports various RGMII signaling voltages, including 3.3, 2.5, 1.8, and 1.5V.

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