The DP83891 is the first fully integrated, feature rich Physi- s Fully integrated 10BASE-T,100BASE-TX and cal Layer transceiver with integrated PMD sublayers to sup1000BASE-T capable port 10BASE-T,100BASE-TX and 1000BASE-T Ethernet s Single Quad TX-Transformer interface for all speeds protocols. It operates on existing CAT5 cables which s Fully compliant to IEEE 802.3u 100BASE-TX and IEEE reduces deployment costs.