Enhanced 36-PHY 1.5Gbps and 3.0Gbps SAS Edge/Fanout Expander 3.3V/1.8V/1.2V 564-Pin TBGA

The VSC7157XYS-03 is a 36-PHY Serial Attached SCSI (SAS) edge/fan out expander. The device provides SAS port expansion as defined by the ANSI T10 Serial Attached SCSI 1.0 and 1.1 specifications for both edge and fan out expanders. The VSC7157XYS-03 is targeted at embedded applications in the midrange and enterprise storage environments including blade servers, JBODs, and RAID systems. It offers an attractive technology upgrade for those systems that currently employ parallel SCSI technology and have substantial reliance on SCSI-centric applications software or management solutions. The VSC7157XYS-03 provides active port expansion for up to 36 connected PHYs with connections made via a high-performance internal non blocking cross-bar matrix.Programmable output preemphasis and input signal equalization ensure consistent high signal quality in lengthy in-and-out-of-box backplanes or cable infrastructures. The on-board CPU in the VSC7157XYS-03 performs the role of an SMP management application client and can participate in enclosure management functions through serial I²C interfaces, an embedded Ethernet controller, or vendor-specific SMP implementations. The VSC7157XYS-03 is a SAS expander containing all the functions needed to implement a 1.5Gbps or 3.0Gbps SAS enterprise server or JBOD system. This device is typically used in distributing SAS signals to an array of disk drives either in a server or an external enclosure. Commonly, two or more “initiator” ports connect to the SAS SAN and several disk ports connect to drives over a 3Gbps serial backplane. The embedded enclosure management controller, software/firmware-compatible with other Maxim enclosure management controllers, configures and monitors both the VSC7157XYS-03 and the entire enclosure through flexible low-speed interfaces.

• 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 Deemphasis 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
• 3.3V, 1.8V, and 1.2V Power
• 564-Pin, 35mm x 35mm TBGA
• End-to-End Zoning
• Comprehensive Statistics (per PHY)