The DP83TD555J-Q1 is an IEEE802.3cg 10BASE-T1S and Open Alliance (OA) TC10, TC14 compliant Serial Peripheral Interface (SPI) MAC-PHY Ethernet transceiver. The device supports 10Mbps multi-drop or point-to-point half-duplex communication over unshielded twisted pair cables with extended common mode voltage tolerance. The device communicates to a host controller or switch using OA SPI. The DP83TD555J-Q1 integrates IEEE802.3 Media Access Controller (MAC) that enables microcontrollers with SPI to seamlessly connect to Ethernet networks using the 10BASE-T1S bus. The DP83TD555J-Q1 incorporates TC10 wake/sleep features to enable efficient system-level power consumption. The device supports remote wake-up over the Ethernet data line. When a wake-up event is detected, the DP83TD555J-Q1 initiates system start-up by driving INH high. The device also integrates IEEE 1588v2 /802.1AS to enable accurate time synchronization and hardware timestamping for time-critical automotive and industrial applications. The DP83TD555J-Q1 is equipped with diagnostic features such as cable fault detection, undervoltage and overtemperature monitoring to streamline system development and maintenance.