Texas Instruments DP83825I Low Power 10/100Mbps Ethernet Physical Layer Transceiver is an ultra-small form factor, extremely low power Ethernet Physical Layer transceiver. This device has integrated PMD sublayers to support 10BASE-Te, 100BASE-TX Ethernet protocols. The device supports up to 150m reach over CAT5e cable. The device interfaces directly to twisted pair media through an external transformer. It interfaces to the MAC layer via Reduced MII (RMII) both in Master and Slave mode. It offers a 50MHz output clock in RMII Master Mode. This clock is synchronised to MDI derived clock to decrease the jitter in the system.
The device also supports Energy Efficient Ethernet, Wake-on-LAN and MAC isolation to lower the system power consumption even further. This mode can be activated through register configuration for legacy MACs not supporting EEE signalling over MAC. The device can work in unmanaged repeater mode. In this mode, the device operates as a repeater without register configuration. The device provides integrated cable diagnostic tools, built-in self-test and loopback capabilities for ease of development and debug.