OVERVIEW
   The VSC8540RT device is a radiation tolerant single port Fast Ethernet copper PHY targeting space-constrained 10/ 100BASE-TX applications. It is designed to withstand the harsh aerospace environment with enhanced radiation performances, extreme temperatures, and vacuum while being highly reliable. It features integrated line-side termination to conserve board space, lower EMI, and improve system performance. Additionally, integrated RGMII timing compensation eliminates the need for on-board delay lines.

   Microchip’s EcoEthernet™ v2.0 technology supports IEEE® 802.3az Energy-Efficient Ethernet (EEE) and power-saving features to reduce power based on link state and cable reach. VSC8540RT device optimizes power consumption in all link operating speeds and features a Wake-on-LAN (WoL) power management mechanism for bringing the PHY out of a low-power state using designated magic packets.

   Fast link failure (FLF) indication for high availability networks identifies the onset of a link failure for 10BASE-T/100BASE-TX links. Potential link failure events can be more flexibly monitored using an enhanced FLF2 state machine, which goes beyond FLF indication by enabling signaling of the link potentially going down within 150 µs.

   The device includes recovered clock output for Synchronous Ethernet applications. Programmable clock squelch control is included to inhibit undesirable clocks from propagating and to help prevent timing loops.