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Vitesse Semiconductor
Vitesse Semiconductor

VSC7175 Datasheet Preview

VSC7175 Datasheet

Serial ATA 2:1 Fail-over Switch

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VSC7175 pdf
PHYSICADLALTAAYCOEMR PPRROODDUUCCTST
VSC7175
Serial ATA 2:1 Fail-over Switch
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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
Very Low Power
BENEFITS:
Simple Mux-based Serial ATA Fail-over Switching Capability (no re-
timing and Repeating Complexity)
Supports Both 2:1 and 1:2 Modes of Operation
High 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
Proven 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:
HAINP
HAINN
OOBDTA
OOB
HAOUTP
HAOUTN
En
HBINP
HBINN
OOB
HBOUTP
HBOUTN
En
HASLTD
0
S1
MODE1
MODE0
0
1S
En
DRVOUTP
DRVOUTN
0
1S
DRVINP
OOB DRVINN
OOBDTD
0
1S
MODE1
Edge-Triggered
Logic
SET
RST
Q
QN
HSTSELA HSTSELB
PB-VSC7175-001



Vitesse Semiconductor
Vitesse Semiconductor

VSC7175 Datasheet Preview

VSC7175 Datasheet

Serial ATA 2:1 Fail-over Switch

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VSC7175 pdf
VSC7175
Serial ATA 2:1 Fail-over Switch
GENERAL DESCRIPTION:
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:
I/O Controller A
VSC7175
I/O Controller B
Backplane
"Mudflap"
Serial ATA Drive
APPLICATION DIAGRAM FIGURE 2:
Serial ATA
Host Bus Adaptor
PCI Bus
Port A
Internal
Connector
Port B
VSC7175
Link Replicator
External
Connector
External
Connector
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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
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com


Part Number VSC7175
Description Serial ATA 2:1 Fail-over Switch
Maker Vitesse Semiconductor
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