The LAN83C180 is a single chip CMOS physical layer (PHY) solution providing all necessary functions between the Media Independent Interface (MII) and the magnetics connected to Category 5 twisted pair media. It is designed for 10BASE-T and 100BASE-TX Ethernet, and is based on the IEEE 802.3 specifications. The LAN83C180 is compatible with the Auto Negotiation section of IEEE 802.3u and provides all the support needed for the IEEE 802.3x Full Duplex specification. The LAN83C180 can operate in adapter mode or repeater/switch modes.