VSC7173

Revision 4.1 May 23, 2005 Confidential www.DataSheet4U.com VSC7173 Data Sheet Enhanced 2:1 Port Selector and 1:2 Port Multiplier for Serial ATA and Serial Attached SCSI FEATURES ● APPLICATIONS ● ● 2:1 port selector and 1:2 port multiplier for both Serial ATA (SATA) and Serial Attached SCSI (SAS) links Serial ATA 1.0 compliant at 1.5 Gbps (3.0 Gbps capable) Passes Serial ATA patterns transparently Programmable receiver sensitivity High output swing mode with pre-emphasis Compatible with VSC7175 and VSC7177 designs 0.7 W power dissipation 3.3 V power supply 32-pin, 7 mm x 7 mm QFP-N package Active-passive redundant failover systems Dual-port Serial ATA and Serial Attached SCSI disk arrays (JBODs) NAS servers RAID subsystems Disk-based backup systems Serial ATA and Serial Attached SCSI routing applications Buffers for externally connected links Serial ATA port replicators Serial ATA Host Bus Adapters selecting between internal and external connectors ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● To order the VSC7173 device, see “Ordering Information,” page 17. GENERAL DESCRIPTION The VSC7173 is a Serial ATA and Serial Attached SCSI multiplexer and buffer that implements a 2:1 port selector function for 1.5 Gbps and 3.0 Gbps links. This function is used when dual hosts, such as I/O controllers, must access single-port disk drives in high availability storage subsystems where redundancy and load sharing are important. The outputs from the I/O controllers are multiplexed to a Serial A...