The KSZ8081MNXIA is a single-supply 10BASE-T/100BASE-TX Ethernet physical layer transceiver for data transmission over standard CAT-5 UTP cable. It features a Media Independent Interface (MII) for direct connection to MII-compliant Ethernet MACs and integrates on-chip termination resistors and a 1.2V core regulator to simplify board layout. Key features include HP Auto MDI/MDI-X for automatic cable correction, auto-negotiation for speed and duplex selection, and LinkMD® TDR-based cable diagnostics. Operating from a single 3.3V supply with I/O options for 1.8V, 2.5V, or 3.3V, this device is rated for the industrial temperature range of –40°C to +85°C. The KSZ8081MNXIA is ideal for applications such as IP phones, set-top boxes, game consoles, and printers.