Micrel has introduced the KSZ8051/8031 family of low-power, single-port 10/100 Mbps physical layer Ethernet transceivers. The ICs provide the MII or RMII interface to transmit and receive data over standard CAT-5 unshielded twisted pair (UTP) cable or fibre. The solution is based on Micrel’s enhanced mixed-signal design which enables power consumption to be reduced by half compared to the previous device generation. The devices integrate on-chip termination and regulator.
Full compliance to the IEEE 802.3/802.3u standard ensures that the devices will work seamlessly with other standards-compliant devices. The single external power supply (3,3 V), with integrated regulator, enables core operation at 1,2 V with I/O at 1,8 V/2,5 V/3,3 V. The KSZ8051MLL/FLL comes in a 48-pin LQFP package and provides a MII MAC interface with the option to interface to copper or fibre media. The KSZ8051MNL/RNL is a copper transceiver housed in a 32-pin QFN with the option for a MII or RMII MAC interface. The KSZ8031RNL offers the smallest package, 24-pin QFN, with an RMII MAC interface. Auto MDI/MDIX crossover support eliminates the need for a crossover cable and easy to use LinkMD TDR-based cable diagnostics allow for identification of common cabling problems, including those not addressed by IEEE standards.
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