Main Features

• Single and two-step IEEE1588 time stamping over encapsulated links including MPLS and PBB

• MPLS and Ethernet Y.1731 OAM support

• EcoEthernet 2.0 green technology for energy efficiency

Radiation Performances

• No Single Event Latch-up Below a LET Threshold of 78 MeV.cm2 /mg @125°C

• Total Ionizing Dose of 100 krad(Si)

Packages

• PBGA256, 256-lead Plastic Ball Grid array, 17 mm × 17 mm body size, 1 mm pin pitch, and 1.8 mm maximum height

• CQFP256, 256-lead CQFP, 36 mm x 36 mm body size, 0.5 mm pin pitch and 4.03 mm maximum height

The VSC8574RT is a radiation-tolerant, low-power, quad-port Gigabit Ethernet transceiver with four SerDes interfaces for quad-port dual media capability. It is developed to withstand the harsh aerospace environment with enhanced radiation performances, extreme temperatures, and vacuum while being highly reliable.

The VSC8574RT device features VeriTime™ IEEE 1588, Microchip’s patent-pending timing technology that delivers the industry’s most accurate IEEE 1588 network timing and synchronization timing. VSC8574RT supports four dual media copper/fiber ports with SGMII and QSGMII MAC interfaces. Recovered clock outputs and an integrated IEEE1588 network timing and synchronization timing packet engine enable the VSC8574RT device to meet the demands of applications requiring highly precise timing, without adding unnecessary complexity or increased cost to the design.

To meet Carrier demands for redundancy, the VSC8574RT device has dual recovered clock outputs for primary and secondary timing references for Synchronous Ethernet (SyncE) solutions. Programmable clock squelch control is included for inhibiting undesirable clocks from propagating and preventing timing loops. In addition to identifying PTP Y.1731 in Ethernet and IPv4/6 over Ethernet per IEEE 1588 network timing and synchronization, VSC8574RT supports various encapsulation links including IPover MPLS, Ethernet pseudowire over MPLS/MPLS-TP, QinQ, and MAC-in-MAC. VSC8574 supports Ring Resiliency™, a feature that enables PHY ports to switch between master and slave timing without interrupting the 1000BASE-T link. VSC8574RT has integrated temperature monitoring and is ideal for high-temperature applications. Microchip’s innovative EcoEthernet™ IEEE 802.3az Energy Efficient Ethernet technology supports Energy Efficient Ethernet (EEE) through ActiPHY™ automatic link power-down and the PerfectReach™ intelligent algorithm that adjusts power based on cable length. VSC8574 further supports reduced power consumption in all link operating speeds.

This space-qualified version of the product adds: Ceramic & Hermetic packages, extended temperature range -40°C to 110°C, extended qualification flow equivalent to QML-V or QML-Q space grade.