The MB86615 is 1394 serial bus controller compatible with the IEEE 1394 "FireWire" standard (IEEE Standard 1394-1995). One built-in port plus a differential transceiver and comparator are provided to enable formation of networks in a 1394 cable environment. The MB86615 supports s100 data transfer speeds. By integrating the physical layer and link layer on one chip, The MB86615 is designed to reduce mounting area as well as power consumption.