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> 1 pc. vitesse# VSC7177YI, 2:1 failover switch for seria
1 pc. vitesse# VSC7177YI, 2:1 failover switch for seria
The following item has just been added to our store in a larger qty. This item is for 1 pc. only!
IC Communications, Enhanced 2:1 Failover Switch for Serial ATA and Serial Attached SCSI
Active-Passive Redundant Failover Systems
Dual-ported Serial ATA and Serial Attached SCSI Disk
Serial ATA and Serial Attached SCSI Routing Applications
Buffers for Externally Connected Links
2:1 Failover Switch for Both Serial ATA (SATA) and Serial
Serial ATA 1.0 Compliant at 1.5 Gb/s and 3.0 Gb/s
Compliant to Serial ATA II Port Selector Specification 1.0
Passes Serial ATA and Serial Attached SCSI Patterns
High Output Swing Mode with Pre-Emphasis
Compatible with Legacy Designs (VSC7175); Provides
Enhanced Connectivity and Signal Pre-emphasis
0.6 - 0.8W Power (depending on operating mode)
32-Pin, 7mm x 7mm QFP-N Package
The VSC7177 is a Serial ATA and Serial Attached SCSI
multiplexer/buffer that 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-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 the Serial ATA or Serial Attached SCSI drive. The output from the drive is
buffered and replicated to the I/O controllers. When switching from one I/O controller
to the other, the Serial ATA link must be reinitialized with out of band signals that are
transferred through the VSC7177 transparently. The VSC7177 provides high output
swings, pre-emphasis and improved receiver sensitivity needed to drive long
backplanes and external cables. Port connectivity for the device can be configured
using two different methods. The device can be configured by driving external I/O pins
or through protocol-based port selection as defined by the SATA II Port Selection
