The RTL8211BN-GR is an Ethernet physical layer transceiver from Realtek that is used to connect Ethernet devices to a Local Area Network (LAN). It is a single-chip Fast Ethernet PHYceiver which supports 10/100Mbs transmission speeds. It integrates a Media Access Control (MAC) controller, Physical-Coding Sub Layer (PCS) and PMD sub layers and several analog blocks such as an on-chip Phase Lock Loop (PLL). The device is compliant with IEEE 802.3, 802.3u, 802.3x and other standards. It supports half and full-duplex operation and provides diagnostic LEDs. The device is available in a 48-pin QFN package.