Overview
The VSC7157XYS-03 is a highly integrated 36-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 embedded applications in midrange and enterprise storage environments, including blade servers, JBODs, and RAID systems. The VSC7157XYS-03 offers a robust solution for systems transitioning from parallel SCSI technology, leveraging its comprehensive features and high-performance capabilities.
Key Specifications
| Specification | Details |
|---|---|
| Number of SAS Expander PHYs | 36 |
| PHY Speed | 1.5Gbps or 3.0Gbps |
| PHY Speed Detection and Negotiation | Automatic |
| Serial ATA Drive Support | Internal STP/SATA Bridging Functions (1 per PHY) |
| Output Preemphasis and Input Signal Equalization | Programmable levels (per port) |
| Wide-Port Support | Up to n PHYs wide |
| Configuration Modes | SAS Fanout or Edge Expander |
| Switch Architecture | Nonblocking cross-bar matrix |
| Operating Modes | Parallel Master, Parallel Slave, I²C Serial Interface Slave, and SPI™ Master Modes |
| Power Supply | 3.3V, 1.8V, and 1.2V |
| Package Type | 564-Pin, 35mm x 35mm TBGA |
| End-to-End Zoning | Supported |
| Comprehensive Statistics | Per PHY |
Key Features
- 36 SAS Expander PHYs with Integrated SerDes
- Each PHY can operate independently at 1.5Gbps or 3.0Gbps
- Automatic PHY speed detection and negotiation
- Serial ATA drive support via internal STP/SATA bridging functions (1 per PHY)
- Programmable output preemphasis and input signal equalization levels (per port)
- Wide-port support (up to n PHYs wide)
- 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
- 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 VSC7157XYS-03 used for?
The VSC7157XYS-03 is used for SAS port expansion in storage systems, particularly in midrange and enterprise storage environments. - How many SAS Expander PHYs does the VSC7157XYS-03 have?
The device has 36 SAS Expander PHYs. - What are the supported PHY speeds for the VSC7157XYS-03?
The PHYs can operate at 1.5Gbps or 3.0Gbps. - Does the VSC7157XYS-03 support SATA drives?
Yes, it supports SATA drives via internal STP/SATA bridging functions. - What is the package type of the VSC7157XYS-03?
The package type is a 564-Pin, 35mm x 35mm TBGA. - What are the power supply options for the VSC7157XYS-03?
The device operates with 3.3V, 1.8V, and 1.2V power supplies. - Can the VSC7157XYS-03 be configured as both a fanout and an edge expander?
Yes, it can be configured as both a SAS fanout and an edge expander. - What kind of switch architecture does the VSC7157XYS-03 use?
The device uses a nonblocking cross-bar matrix switch architecture. - Does the VSC7157XYS-03 support end-to-end zoning?
Yes, it supports end-to-end zoning. - What kind of statistics does the VSC7157XYS-03 provide?
The device provides comprehensive statistics per PHY. - What are some common applications of the VSC7157XYS-03?
Common applications include blade servers, JBOD arrays, and storage area network (SAN) appliances.
