GENERAL DESCRIPTION
FEATURES
The KSZ8031RNL is a single-supply 10Base-T/100BaseTX Ethernet physical layer transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ8031RNL is a highly-integrated, compact solution. It reduces board cost and simplifies board layout by using on-chip termination resistors for the differential pairs, by integrating a low noise regulator to supply the 1.2V core, and by offering 1.8/2.5/3.3V digital I/O interface support. The KSZ8031RNL offers the Reduced Media Independent Interface (RMII) for direct connection to RMII-compliant MACs in Ethernet processors and switches. As the power-up default, the KSZ8031RNL uses a 25MHz crystal to generate all required clocks, including the 50MHz RMII reference clock output for the MAC. To facilitate system bring-up and debugging in production testing and in product deployment, parametric NAND tree support enables fault detection between KSZ8031RNL I/Os and board, while Micrel’s LinkMD® TDR-based cable diagnostics permit identification of faulty copper cabling.
Micrel
