KSZ8051MNLU

KSZ8051MNLU/KSZ8051RNLU 10Base-T/100Base-TX Physical Layer Transceiver Data Sheet Rev. 1.0 General Description The KSZ8051 is an AEC-Q100 standard qualified singlesupply 10Base-T/100Base-TX Ethernet physical-layer transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable for automotive applications. The KSZ8051 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. The KSZ8051MNLU offers the Media Independent Interface (MII) and the KSZ8051RNLU offers the Reduced Media Independent Interface (RMII) for direct connection with MII/RMII-compliant Ethernet MAC processors and switches. A 25MHz crystal is used to generate all required clocks, including the 50MHz RMII reference clock output for the KSZ8051RNLU. The KSZ8051 provides diagnostic features to facilitate system bring-up and debugging in production testing and in product deployment. Parametric NAND tree support enables fault detection between KSZ8051 I/Os and the board. Micrel LinkMD® TDR-based cable diagnostics identify faulty copper cabling. The KSZ8051MNLU and KSZ8051RNLU are available in 32-pin, lead-free QFN packages (see “Ordering Information”). Data sheets and support documentation are available on Micrel’s web site at: www.micrel.com. Features Single-chip 10Base-T/100Base-TX IEEE 802.3 compliant Etherne...