• Host Bus: PCI Express base 2.0 specifications
  • USB 3.0 & eSATA Combo Host Adapter
  • Compliant with Universal Serial Bus 3.0 specification
  • Low Profile PCI Form Factor

U3S221-PCIE1XG201 is a USB 3.0 & eSATA to PCI Express Gen2 Host Bus Adapter.

The U3S221-PCIE1XG201 complies with Universal Serial Bus 3.0 Specification, and Intel’s eXtensible Host Controller Interface (xHCI).

The U3S221-PCIE1XG201 uses a PCI Express bus interface, and it is applicable for PCI Express solutions with host PC systems.

The U3S221-PCIE1XG201 supports data transfer up to 5 Gbps when connecting to USB 3.0 compliant peripherals, while maintaining compatibility with existing USB peripheral devices.

Technical Specifications

PCIe Host Bus

  • Compliant with PCI Express Base Specification 2.0
  • Supports PCI Bus Power Management Interface Specification revision 1.2
  • Operational registers are direct-mapped to PCI memory space
  • Supports Serial Peripheral Interface (SPI) type ROM

USB Features

  • Compliant with Intel’s eXtensible Host Controller Interface (xHCI) Specification revision 0.95
  • Supports one downstream ports at all speeds
  • Supports all USB compliant data transfer types as follows; Control / Bulk / Interrupt / Isochronous transfer
  • Supports USB legacy functions
  • USB3.0 PHY for super-speed Tx/Rx
  • Provides screw holes on bracket for supporting USB3 cable with Jackscrew in A-plug
USB Data Transfer Rate
  • Low-speed (1.5 Mbps)
  • Full-speed (12.0 Mbps)
  • High-speed (480.0 Mbps)
  • Super-speed (5.0 Gbps)
eSATA Features
  • Serial ATA Revision 3.0 Specification Compliant
    • SATA Gen2i/Gen2m (3Gbps) and SATA Gen1i/Gen1m (1.5 Gbps)
    • Supports SATA Hot Plug
  • Supports over 2-Terabytes and 4KB-sector Hard Drives
  • Supports both SATA HDDs and ODDs.
  • Supports SATA ODDs (BD/DVD/CD)
  • SATA host port supports write-protect function
Number of Ports
  • External USB 3.0 Host port with Screw Holes for thumbscrew locking Type USB 3.0 Cable
  • Internal SATA 7pin Host port
  • Write Protect Jumper
  • Activity LED
  • One Touch Backup Button
Computer Platform
  • Computer with PCI Express slot (x1, x4, x8, x16)

    For the best performance (5.0 Gbps), U3S221-PCIE1XG201 should be installed in a PCIe Gen 2 compliant slot in the host computer.  Most computers have PCIe Gen 2 (5.0 Gbps) throughput on x8 or x16 slots.
    A PCIe Gen 1 compliant slot reaches up to 2.5 Gbps throughput.

Operating System Requirements
  • Windows XP, Windows Vista, Windows 7
  • USB 3.0 Host Drivers
    x86 (32-bit) and x64 (64-bit)
    • Windows XP
    • Windows Vista
    • Windows 7
Kit includes
  • U3S221-PCIE1XG201
  • User's Guide
  • CD-title
    • USB 3.0 Host Drivers
    • iSmart Software
      • Detects multiple USB hard disk drives and provides detailed information of the disk drives; for example, model number, drive partitions, temperature, and so on.
      • Displays current values of S.M.A.R.T. attributes, giving you extensive information about the health of your USB hard drive.
      • Provides a quick S.M.A.R.T self-test feature to test your USB hard drive.
      • Provides a taskbar system tray icon to display USB hard disk drive information, USB speed mode, disk drive temperature, and disk free space capacity.
    • USB Fast Software
      • USB Fast will enable your USB HDD to have higher transfer efficiency.
    • Backup software