VSC7170XYQ-01

Overview

The VSC7170XYQ-01 is a Serial ATA (SATA) multiplexer and buffer manufactured by Analog Devices Inc./Maxim Integrated. It implements a 2:1 failover-switch function for 1.5Gbps and 3.0Gbps links, supporting both active-active and active-passive configurations. The device features three independent SATA channels with auto-negotiation capabilities. It conforms to Serial ATA II specifications including Port Multiplier Revision 1.1, Port Selector Revision 1.0, and PHY Electrical Specification Revision 1.0. The component operates on a single 3.3V power supply with typical power consumption of 1.5W. It is housed in a 52-pin QFN package measuring 64mm².

Feature Summary

• Supports 2:1 port selector configuration for dual-host access to single drives and 1:2 port multiplier mode for connecting one host to two devices.
• Provides high output swings with programmable preemphasis, input line equalization, and analog LOS thresholds configurable via pins.
• Includes built-in self-test (BIST) with diagnostic loopback and supports asynchronous signal recovery and spread-spectrum clocking.
• Features active-active circuitry allowing multiple initiators in port selector mode and staggered drive spin-up in port multiplier mode.

Applications

• Active-Passive or Active-Active Redundant Failover Systems
• High-Availability, Critical Data Storage Systems
• RAID Subsystems
• NAS Servers
• SATA HBAs Selecting Between Internal and External Connectors

Procurement Notes

Verify the current availability status as the product is designated Not Recommended for New Designs. Confirm Last Time Buy deadlines before placing orders. Ensure compatibility with existing Serial ATA II standards during integration planning.

Selection Notes

Select this component for applications requiring redundant storage access or port expansion using SATA interfaces. Evaluate the need for active-active versus active-passive modes based on system redundancy requirements. Consider the 3.3V power supply constraint and thermal management for the QFN package.

Part Context

The VSC7170 series serves as a specialized interface solution for storage subsystems requiring link buffering and switching. It bridges the gap between host bus adapters and storage devices in complex array environments. The device simplifies design by integrating multiplexing logic and signal conditioning into a single chip.

Replacement Considerations

No direct public substitute part numbers are confirmed. As the device is not recommended for new designs, alternative solutions may require redesigning the storage interface architecture to accommodate different switching topologies or utilizing discrete components.