Description

VIA Lab’s VL122 / VL122i is a USB 2.0 Hub Controller, full compliance with USB 2.0 specification. VL122 / VL122i offered in 2/4-port configurations: two/four USB 2.0 ports and features integrated voltage regulators, new lower-power design. VL122 / VL122i supports any combination of High Speed (480Mbps), Full Speed (12Mbps), and Low Speed (1.5Mbps) devices, and the integrated USB 2.0 hub’s Single Transaction Translators feature. The integrated regulator of 5V to 3.3V and 3.3V to 1.8V inside of VL122 / VL122i, therefore no external Voltage Regulator is required and can enable VL122 /  VL122i to be powered directly from USB VBus(5V), reducing BOM cost. VL122 / VL122i supports flexible configuration for customers, The VID, PID, and number of downstream ports and Non-removable downstream port setting etc. through the external EEPROM (24C02) or SMBUS or I/O Strapping (QFN28 package only).   VL122 / VL122i-based hub devices work under Windows, Mac OS X, and various Linux kernels without additional drivers. VL122 / VL122i-based hub devices are also compatible with non-x86 devices and platforms that support USB hub functions such as smart phones, tablets, and set-top boxes. It is well suited for all USB hub applications such as standalone USB hubs, Notebook/Ultrabook docking stations/port-replicators, desktop PC front panel, motherboard on-board hub, and USB hub compound devices.

Block Diagram

Key Features

• USB 2.0 Compliant
  - Compliant to Universal Serial Bus 2.0 Specification
  - Compliant to Universal Serial Bus 1.1 Specification
  - USB 2.0 Hub Supports STT
  - In-house USB PHY employs advanced CMOS process for low power consumption
• Certification
  - Earned USB 2.0 USB-IF certification TID# 14201
• Power Management and Flexible Configure Support
  - Supports both Individual and Ganged Mode Operation
  　◆ QFN28 - USBPE1#. The only one power enable output for GANG mode.
  　◆ QFN24 - USBPE1#/USBPE2#. The power enable output for Individual mode.
  - Support LPM L1 By External EEPROM (24C02) configure
  - Support Customized VID/PID By External EEPROM (24C02) or SMbus.
  - Support Downstream Ports Configure, Non-Removable By External EEPROM (24C02) or SMbus or I/O Strapping(QFN28 only)

• Support operation in extended-temperature environments from -40°C to +85°C
• Power and Package
  - 12MHz Xtal
  - Integrated Voltage Regulators Generate All Required Voltages from 5V Input
  *5V to 3.3V Voltage Regulator
  *3.3V to 1.8V Voltage Regulator
  - QFN 28 green package (5x5x0.75 mm)*Support will be discontinued starting in 2027. Please refer to the package height PCN(#2618-01) for details.
  - QFN 28 green package (5x5x0.85 mm)
  - QFN 24 green package (4x4x0.85 mm)