Atheros LAN Chip for Ubiquiti Netowrks Nano and Loco Series and for Mikrotik RB411 Series (Spare Part)

it is a 10BaseT/100BaseTX/FX Physical Layer Transceiver, which provides an MII to transmit and receive data. It contains the 10BaseT Physical Medium Attachment (PMA), Physical Medium Dependent (PMD), and Physical Coding Sub-layer (PCS) functions.