The Microchip media independent interface (MII), includes all the functions of a 10/100BASE-T/TX/FX switch system that combines a switch engine, frame buffer management, address look-up table, queue management, MIB counters, Media Access Controllers (MAC) and PHY transceivers. The device offers comprehensive programmable 2 LED indicators support for link, activity, full-/half-duplex and 10/100 speed operations. These LED pins are directly controllable. This 64 pin device has an industrial temperature range from –40°C to +85°C.

Single 3.3V power supply with optional VDD input and output for 1.8 V, 2.5 V, or 3.3 V
Non-blocking store-and-forward switch fabric ensures fast packet delivery
Loopback modes for remote failure diagnostics
Three Internal Media Access Control Units