Overview
The VSC7156XYT-03 is a 24-PHY Serial Attached SCSI (SAS) edge/fanout expander produced by Analog Devices Inc./Maxim Integrated. This device is designed to provide SAS port expansion in accordance with the ANSI T10 Serial Attached SCSI 1.0 and 1.1 specifications. It is particularly suited for midrange and enterprise storage environments, including blade servers, JBODs (Just a Bunch of Disks), and RAID systems. The VSC7156XYT-03 offers a significant technology upgrade for systems currently using parallel SCSI technology, allowing for seamless integration with existing SCSI-centric applications and management solutions.
Key Specifications
| Parameter | Description |
|---|---|
| Number of SAS Expander PHYs | 24 |
| PHY Operating Speeds | 1.5Gbps and 3.0Gbps |
| Configuration | Configurable as a SAS Fanout or Edge Expander |
| Switch Architecture | Nonblocking Switch Architecture (Any PHY to Any PHY Connectivity) |
| Routing | Table Routing |
| Virtual PHY Engines | SMP and SSP Virtual PHY with Initiator and Target Capability |
| Enclosure Management | Embedded Enclosure Management Processor for Local Control and SES Functions |
| Operating Modes | Parallel Master, Parallel Slave, I²C Serial Interface Slave, and SPI™ Master Modes |
| PHY Speed Detection | Automatic PHY Speed Detection and Negotiation |
| SATA Support | Serial ATA Drive Support via Internal STP/SATA Bridging Functions |
| Signal Quality | Programmable Output Deemphasis and Input Signal Equalization Levels |
| Power Supply | 3.3V, 1.8V, and 1.2V |
| Package | 484-Pin, 31mm x 31mm TBGA |
| Zoning | End-to-End Zoning |
| Statistics | Comprehensive Statistics (per PHY) |
Key Features
- 24 SAS Expander PHYs with Integrated SerDes
- Each PHY Can Operate Independently at 1.5Gbps or 3.0Gbps
- Configurable as a SAS Fanout or Edge Expander
- Nonblocking Switch Architecture (Any PHY to Any PHY Connectivity)
- Table Routing
- SMP and SSP Virtual PHY with Initiator and Target Capability
- Embedded Enclosure Management Processor for Local Control and SES Functions
- Four Operating Modes: Parallel Master, Parallel Slave, I²C Serial Interface Slave, and SPI™ Master Modes
- Automatic PHY Speed Detection and Negotiation
- Serial ATA Drive Support via Internal STP/SATA Bridging Functions
- Programmable Output Deemphasis and Input Signal Equalization Levels
- End-to-End Zoning
- Comprehensive Statistics (per PHY)
Applications
- Blade Servers
- Disk-Based Backup Storage
- Enterprise Storage Environments
- Fabric Attached Storage (FAS) Systems
- Fixed-Content Storage Systems
- JBOD Arrays
- Modular Direct-Attached Storage (DAS)
- Near-Line Storage Replacement Systems
- Network Attached Storage (NAS) Systems
- Rack-Mounted Servers with RAID
- Storage Area Network (SAN) Appliances
Q & A
- What is the primary function of the VSC7156XYT-03?
The VSC7156XYT-03 is a 24-PHY Serial Attached SCSI (SAS) edge/fanout expander, providing SAS port expansion as defined by the ANSI T10 Serial Attached SCSI specifications.
- What are the operating speeds of the PHYs in the VSC7156XYT-03?
The PHYs in the VSC7156XYT-03 can operate at 1.5Gbps or 3.0Gbps.
- What types of configurations are supported by the VSC7156XYT-03?
The VSC7156XYT-03 can be configured as a SAS Fanout or Edge Expander.
- What is the switch architecture of the VSC7156XYT-03?
The VSC7156XYT-03 features a nonblocking switch architecture, allowing any PHY to connect to any other PHY.
- Does the VSC7156XYT-03 support SATA drives?
Yes, the VSC7156XYT-03 supports Serial ATA drives via internal STP/SATA bridging functions.
- What are the power supply requirements for the VSC7156XYT-03?
The VSC7156XYT-03 requires 3.3V, 1.8V, and 1.2V power supplies.
- What is the package type and size of the VSC7156XYT-03?
The VSC7156XYT-03 is packaged in a 484-Pin, 31mm x 31mm TBGA.
- Does the VSC7156XYT-03 support enclosure management functions?
Yes, the VSC7156XYT-03 includes an embedded enclosure management processor for local control and SES functions.
- What operating modes are supported by the VSC7156XYT-03?
The VSC7156XYT-03 supports Parallel Master, Parallel Slave, I²C Serial Interface Slave, and SPI™ Master Modes.
- Does the VSC7156XYT-03 provide comprehensive statistics?
Yes, the VSC7156XYT-03 provides comprehensive statistics per PHY.
