VSC7153XSS-02

Overview

The VSC7153XSS-02 is a multimode, user-configurable 24-PHY Serial Attached SCSI (SAS) expander designed for edge and fanout topologies. It supports SAS port expansion as defined by the ANSI T10 Serial Attached SCSI 1.0 and 1.1 specifications. The device provides active port expansion for up to 24 connected PHYs via a high-performance internal nonblocking cross-bar matrix. Each PHY operates independently at 1.5Gbps or 3.0Gbps speeds with automatic detection and negotiation capabilities. The integrated architecture includes 24 10-bit serializer/deserializers (SerDes), per-PHY diagnostics, retiming elasticity buffers, and an embedded Stanford-1 32-bit RISC CPU for enclosure management.

Feature Summary

• Supports configurable SAS Fanout or Edge Expander topologies with nonblocking switch architecture enabling any-to-any PHY connectivity.
• Features an embedded Stanford-1 32-bit RISC processor for local control, SES functions, and SMP management application client participation.
• Includes programmable output deemphasis and input signal equalization levels to ensure consistent high signal quality across backplanes.
• Provides table routing supporting up to 320 destination addresses alongside SMP and SSP virtual PHY engines with initiator and target capability.

Applications

• Blade Servers
• JBOD Arrays
• Enterprise Storage Environments
• Rack-Mounted Servers with RAID
• Storage Area Network (SAN) Appliances

Procurement Notes

Verify component status before procurement as this product is Not Recommended for New Designs. Some versions may be No Longer Available or being discontinued and subject to Last Time Buy, after which new orders can not be placed. Confirm package availability and lead times directly with authorized distributors or the manufacturer to ensure supply continuity for existing designs.

Selection Notes

Select this component for midrange and enterprise storage environments requiring SAS port expansion. Ensure compatibility with existing parallel SCSI technology and SCSI-centric applications software. Verify that the system design accommodates the TESBGA package dimensions of 961mm² with 484 pins. Consider the need for embedded enclosure management capabilities and support for both 1.5Gbps and 3.0Gbps signaling rates.

Part Context

The VSC7153XSS-02 belongs to the VSC7153 series of SAS expanders manufactured by Analog Devices Inc./Maxim Integrated. This series targets systems transitioning from parallel SCSI to serial architectures. The specific X suffix denotes the package variant within the TESBGA family. The device integrates all necessary functions to implement a 1.5Gbps or 3.0Gbps SAS enterprise server or JBOD system.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the device is marked Not Recommended for New Designs, consult official sources for potential end-of-life alternatives or next-generation replacements.