physical layer product VSC7175 applications: active-passive redundant failover systems dual-ported serial ata disk arrays (jbods) nas servers raid subsystems disk-based back-up systems serial ata routing applications buffers for externally connected links serial ata port multipliers/replicators serial ata host bus adapters selecting between internal and external connectors features: 2:1 fail-over switch for serial ata links serial ata 1.0 compliant at 1.5 gb/s (3.0 gb/s capable) passes out-of-band (oob) patterns transparently increased receiver sensitivity high output swing mode with pre-emphasis v ery low power serial ata 2:1 fail-over switch benefits: s imple mux-based serial ata fail-over switching capability (no re- timing and repeating complexity) supports both 2:1 and 1:2 modes of operation h igh output swing mode with pre-emphasis provides for lengthy backplane or cable infrastructure interconnects interoperability with vsc7174 quad serial ata host bus controller delivers end-to-end serial ata solutions oob agnostic p roven technology (based on a long-running vitesse production design) specifications: high output swing mode with pre-emphasis 600 mw maximum power 3.3v power supply 32-pin, 7x7 mm qfp-n package VSC7175 block diagram: datacom products pb-VSC7175-001 0 1 0 1 s 0 1 s hainp hainn oobdta drvoutp drvoutn drvinp drvinn oobdtd haoutp haoutn hboutp hboutn hasltd hbinp hbinn oob s edge-triggered logic 0 1 s oob oob en en en set rst hstsela hstselb mode1 mode1 mode0 q qn
for more information on vitesse products visit the vitesse web site at www.vitesse.com or contact vitesse sales at (800) vitesse or sales@vitesse.com ?2003 vitesse semiconductor corporation 741 calle plano camarillo, ca 93012, usa t el: +1 805.388.3700 fax: +1 805.987.5896 www.vitesse.com the VSC7175 is a serial ata multiplexer/buffer which implements a 2:1 failover switch function for 1.5 gb/s and 3.0 gb/s links. this function is used when dual hosts, such as i/o controllers, must access single-ported disk drives in high availability storage subsystems where redundancy and load sharing are important. the outputs from the i/o controllers are multiplexed to the serial ata drive. the output from the serial ata drive is buffered and replicated to the i/o controllers. the VSC7175 provides the high output swings, pre-emphasis and improved receiver sensitivity needed to drive long backplanes and external cables. application diagram figure 1: general description: application diagram figure 2: serial ata 2:1 fail-over switch VSC7175 "mudflap" backplane VSC7175 i/o controller a i/o controller b serial ata drive link replicator external connector VSC7175 port a port b internal connector serial ata host bus adaptor pci bus external connector
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