KSZ8081RNACA Datasheet PDF - Micrel

●General Description

●The KSZ8081RNA is a single-supply 10Base-T/100Base TX Ethernet physical-layer transceiver  for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable.

●The KSZ8081RNA is a highly-integrated  PHY solution. It reduces board cost and simplifies board layout by using on chip termination resistors for the differential pairs  and  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.

●Features

●•  Single-chip 10Base-T/100Base-TX IEEE 802.3

●compliant Ethernet transceiver

●•  RMII v1.2 Interface support with a 50MHz reference clock output to MAC, and an option to input a 50MHz reference clock

●•  RMII back-to-back mode support for a 100Mbps copper repeater

●•  MDC/MDIO management interface for PHY register configuration

●•  Programmable interrupt output

●•  LED outputs for link and activity status indication

●•  On-chip termination resistors for the differential pairs

●•  Baseline wander correction

●•  HP Auto MDI/MDI-X to reliably detect and correct straight-through and crossover cable connections with

●disable and enable option

●•  Auto-negotiation to automatically select the highest link up speed (10/100Mbps) and duplex (half/full)

●•  Power-down and power-saving modes

●•  LinkMD TDR-based cable diagnostics to identify faulty copper cabling

●•  Parametric NAND Tree support for fault detection between chip I/Os and the board