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VSC7177
Enhanced 2:1 Port Selector for Serial ATA and Serial Attached SCSI
Enhanced Low-Power SAS/SATA 2:1 Failover Switch
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Status
| Part Number |
Status |
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VSC7177
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Active: In Production. But some versions of the family are Not Recommended for New Designs. See Ordering Information. |
Description
The VSC7177 is a Serial ATA and Serial Attached SCSI multiplier/buffer that implements a 2:1 port selector function for 1.5Gbps and 3.0Gbps 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 ATA or Serial Attached SCSI drive. The output from the Serial ATA drive is buffered and replicated to the I/O controllers. When switching from one I/O controller to the other, a Serial ATA link must be re-initialized with out-of-band (OOB) signals, which are transferred through the VSC7177 transparently. The VSC7177 provides high output swings, preemphasis, and programmable receiver sensitivity that are needed to drive long backplanes and external cables.
Port connectivity for the device can be configured using driving external I/O pins or through protocol-based port. See the block diagram on page 2 of the full data sheet.
To receive additional supporting documentation for this device, email .
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Data Sheet
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Key Features
- 2:1 Port Selector for Both Serial ATA (SATA) and Serial Attached SCSI (SAS) Links
- Serial ATA 1.0 Compliant at 1.5Gbps (3.0Gbps Capable)
- Sideband Port Selection
- Complies with Serial ATA II: Port Selector Specification 1.0, Including Failover Control
- Passes Serial ATA Patterns Transparently
- Programmable Receiver Sensitivity
- High Output Swing Mode with Preemphasis
- Compatible with Legacy Designs (VSC7173 and VSC7175); Provides Enhanced Connectivity and Signal Preemphasis
- 0.6W to 0.8W Power Dissipation (Depending on Operating Mode)
- 3.3V Power Supply
- 32-Pin, 7mm x 7mm QFP-N Package
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Applications/Uses
- Active-Passive Redundant Failover Systems
- Buffers for Externally Connected Links
- Disk-Based Backup Systems
- Dual-Port Serial ATA and Serial Attached SCSI Disk Arrays (JBODs)
- NAS Servers
- RAID Subsystems
- Serial ATA and Serial Attached SCSI Routing applications
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Key Specifications:
| Serial ATA (SATA) Port Multipliers/Selectors |
| Part Number |
POUT
(W) |
VCC
(V) |
Data Rate
(Gbps) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Oper. Temp.
(°C) |
| max w/pins |
| VSC7177 |
0.8 |
3.3 |
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50.4 |
0 to +70 |
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See All Serial ATA (SATA) Port Multipliers/Selectors (2)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Block Diagram
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| VSC7177EKN
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Active |
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QFN;32 pin;50.4 mm²
Land Pattern: Not Available
Use pkgcode/variation: G3277+2*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| VSC7177XYI
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NRND |
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QFN;32 pin;50.4 mm²
Land Pattern: Not Available
Use pkgcode/variation: G3277+2*
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0°C to +70°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| VSC7177YI
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NRND |
VSC7177XYI
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QFN;32 pin;50.4 mm²
Land Pattern: Not Available
Use pkgcode/variation: G3277-2*
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0°C to +70°C
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RoHS/Lead-Free: No
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Rev 0;
2007-12-06
This page last modified: 2009-08-26
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