VSC7173XYI

Specialized Overview

The VSC7173XYI is a Serial ATA and Serial Attached SCSI multiplier and buffer implementing a 2:1 port selector for 1.5 Gbps and 3.0 Gbps links. It supports a 1:2 port multiplier mode where one host connects to two drives. The device operates on a single 3.3 V power supply with a typical total current of 170 mA in normal swing mode and 235 mA in high swing mode. Total power dissipation ranges from 625 mW to 850 mW depending on the output configuration. The component features programmable receiver sensitivity, high output swings with pre-emphasis, and transparent OOB signal transfer. It is housed in a 32-pin, 7 mm x 7 mm QFP-N package.

Specialized Feature Summary

• Implements 2:1 port selector and 1:2 port multiplier functions for SATA and SAS links
• Provides high output swings with pre-emphasis to drive extended length media
• Supports transparent out-of-band (OOB) signal transfer between ports
• Features programmable receiver sensitivity and configurable OOB threshold levels

Specialized Applications

• Active-passive redundant failover systems
• Dual-port Serial ATA and Serial Attached SCSI disk arrays
• Serial ATA Host Bus Adapters selecting between internal and external connectors
• NAS servers and RAID subsystems

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and lead-free status. Confirm that the design environment meets the specified operating temperature range of 0°C to +90°C. Ensure proper board layout guidelines are followed for the QFP-N package thermal pad connection.

Specialized Selection Notes

Select this component when dual hosts require access to single-port drives or when a single host needs to connect to multiple drives. Verify compatibility with Serial ATA 1.0 specifications at 1.5 Gbps and ensure the system can accommodate the required 3.3 V power supply. Consider the thermal resistance characteristics if operating in high swing mode.

Specialized Part Context

The VSC7173XYI belongs to the VSC7173 series of Serial ATA and SAS multipliers. It is designed by Maxim Integrated Products. The device provides buffering and multiplexing capabilities essential for storage subsystems requiring redundancy and load sharing between I/O controllers and disk drives.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided datasheet.