The KSZ8041 is a single supply 10Base-T/100Base-TX Physical Layer Transceiver, which provides MII/RMII/SMII interfaces to transmit and receive data. A unique mixed signal design extends signaling distance while reducing power consumption. HP Auto MDI/MDI-X provides the most robust solution for eliminating the need to differentiate between crossover and straight-through cables. The KSZ8041 represents a new level of features and performance and is an ideal choice of physical layer transceiver for 10Base-T/100Base-TX applications. The KSZ8041RNL is an enhanced RMII version of the KSZ8041NL that does not require a 50MHz system clock. It uses a 25MHz crystal for its input reference clock and outputs a 50MHz RMII reference clock to the MAC. The KSZ8041NL and KSZ8041RNL are available in 32-pin, lead-free QFN packages. The KSZ8041TL and KSZ8041FTL are available in 48-pin, lead-free TQFP packages. The KSZ8041MLL is provided in the 48-pin, lead-free LQFP package.Single-chip 10Base-T/100Base-TX physical layer solution Fully compliant to IEEE 802.3u Standard Low power CMOS design, power consumption of <180mW HP auto MDI/MDI-X for reliable detection and correction for straight-through and crossover cables with disable and enable option Robust operation over standard cables Power down and power saving modes SMII interface support with external 125MHz system clock and 12.5MHz sync clock from MAC MIIM (MDC/MDIO) management bus to 6.25MHz for rapid PHY register configuration Fiber support: 100Base-FX (KSZ8041FTL only) Interrupt pin option Programmable LED outputs for link, activity and speed ESD rating (6kV) Single power supply (3.3V) Built-in 1.8V regulator for core Available in 48-pin TQFP (KSZ8041TL/FTL) packages