KSZ8051RNLI

The KSZ8051RNLI from Micrel Inc. is a single-supply Ethernet physical layer transceiver designed for automotive applications. It is AEC-Q100 qualified and supports both 10Base-T and 100Base-TX IEEE 802.3 compliant standards.

This transceiver features an RMII interface with a 50 MHz reference clock output to the MAC, and an option to input a 50 MHz reference clock. It also supports back-to-back mode for a 100 Mbps copper repeater. Key electrical features include a single 3.3V power supply with VDD I/O options for 1.8V, 2.5V, or 3.3V, and a built-in 1.2V regulator for the core.

Additional functionalities include auto-negotiation for automatic speed and duplex selection, HP Auto MDI/MDI-X for reliable cable connection detection, power-down and power-saving modes, and LinkMD TDR-based cable diagnostics for identifying faulty copper cabling. It also provides programmable interrupt output and LED outputs for link, activity, and speed status indication. The device includes on-chip termination resistors for differential pairs and supports loopback modes for diagnostics.

The KSZ8051RNLI is available in a 32-pin 5 mm x 5 mm QFN package, making it suitable for automotive in-vehicle networking applications. Its operating temperature range is from -40°C to 105°C.