Overview
The VSC7158HT-03, produced by Analog Devices Inc./Maxim Integrated, is a highly integrated 18-PHY Serial Attached SCSI (SAS) edge/fanout expander. 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 applications in Blade servers, JBODs (Just a Bunch of Disks), and RAID systems. The VSC7158HT-03 offers a robust solution for systems transitioning from parallel SCSI technology, leveraging its compatibility with existing SCSI-centric applications software and management solutions.
Key Specifications
| Parameter | Description |
|---|---|
| Number of PHYs | 18 SAS Expander PHYs with Integrated SerDes |
| PHY Operating Speeds | 1.5Gbps or 3.0Gbps per PHY |
| Configuration | Configurable as a SAS Fanout or Edge Expander |
| Switch Architecture | Nonblocking Switch Architecture (Any PHY to Any PHY Connectivity) |
| Routing | Table Routing |
| SMP and SSP Virtual PHY | 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 |
| PHY Speed Detection | Automatic PHY Speed Detection and Negotiation |
| SATA Drive Support | Serial ATA Drive Support Using Internal STP/SATA Bridging Functions (1 per PHY) |
| Signal Quality | Programmable Output Deemphasis and Input Signal Equalization Levels |
| Wide-Port Support | Variable Wide-Port Support |
Key Features
- 18 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
- Automatic PHY Speed Detection and Negotiation
- Serial ATA Drive Support Using Internal STP/SATA Bridging Functions (1 per PHY)
- Programmable Output Deemphasis and Input Signal Equalization Levels
- Variable Wide-Port Support
Applications
- Embedded applications in midrange and enterprise storage environments
- Blade servers
- JBODs (Just a Bunch of Disks)
- RAID systems
- Distributing SAS signals to an array of disk drives in servers or external enclosures
Q & A
- What is the VSC7158HT-03 used for?
The VSC7158HT-03 is used for SAS port expansion in midrange and enterprise storage environments, including Blade servers, JBODs, and RAID systems.
- How many PHYs does the VSC7158HT-03 support?
The VSC7158HT-03 supports 18 SAS Expander PHYs with Integrated SerDes.
- At what speeds can each PHY operate?
Each PHY can operate independently at 1.5Gbps or 3.0Gbps.
- What types of configurations are supported by the VSC7158HT-03?
The VSC7158HT-03 can be configured as a SAS Fanout or Edge Expander.
- Does the VSC7158HT-03 support SATA drives?
Yes, it supports Serial ATA drives using internal STP/SATA bridging functions (1 per PHY).
- What is the switch architecture of the VSC7158HT-03?
The VSC7158HT-03 features a nonblocking switch architecture allowing any PHY to any PHY connectivity.
- Does the VSC7158HT-03 have built-in enclosure management?
Yes, it includes an embedded enclosure management processor for local control and SES functions.
- What operating modes are supported by the VSC7158HT-03?
The VSC7158HT-03 supports four operating modes: Parallel Master, Parallel Slave, I²C Serial Interface Slave, and SPI™ Master.
- How does the VSC7158HT-03 handle PHY speed detection?
The VSC7158HT-03 features automatic PHY speed detection and negotiation.
- Can the VSC7158HT-03 adjust signal quality?
Yes, it allows for programmable output deemphasis and input signal equalization levels.
