The DM9101 is a physical-layer, single-chip, low-power transceiver for 100Base-TX, and 10Base-T operations. On the media side, it provides a direct interface either to Unshielded Twisted Pair Category 5 Cable (UTP5) for 100Base-TX Fast Ethernet, or UTP5/UTP3 Cable for 10Base-T Ethernet. Through the IEEE 802.3u Media Independent Interface (MII), the DM9101 connects to the Medium Access Control (MAC) layer, ensuring a high interoperability among products from different vendors. The DM9101 uses a low-power and high-performance CMOS process. It contains the entire physical layer functions of 100Base-TX as defined by IEEE 802.3u, including the Physical Coding