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VIA Lab’s VL819i is advanced USB-C Hub Controller with USB 3.2 Gen1x1 and it features highly integrated, application specific design. VL819i features 1x upstream port and 4x/2x downstream ports, all of which support 5Gbps USB 3.2 Gen 1x1 operation. The downstream ports can support any combination of SuperSpeed (5Gbps), High Speed (480Mbps), Full Speed (12Mbps), and Low Speed (1.5Mbps) devices. VL819i’s integrated USB 2.0 hub features Multiple Transaction Translators, providing increased bandwidth and performance when multiple Full Speed devices are simultaneously used.
VL819i comes in two variants: VL819-Q8i utilizes the QFN88 10x10x0.85 mm package while VL819-Q7i utilizes the smaller QFN76 9x9x0.85mm package. The larger QFN88 variant features integrated 5Gbps Multiplexers for the Upstream Facing Port and two Downstream Facings Ports whereas the smaller QFN76 variant does not. The integrated 5Gbps Multiplexers are ideal for Data-Only USB-C applications that would otherwise require an external Multiplexer, with the advantage of potential board area savings and improved signal integrity. If additional USB-C Ports are need, separate CC Logic and Multiplexer solutions are needed.
VL819i features an optional USB Billboard Device for USB Power Delivery (USB-PD) Alternate Mode applications. It can interface with a PD controller through either the I²C interface or GPIOs. In addition, VL819i supports an optional USB HID endpoint for Media Control functions, including Play/Pause, Volume Up/Down, and other standard HID consumer control buttons.
VL819i features flexible firmware architecture, providing a framework for custom functions in addition to in-field updates. Various parameters including USB configuration, Tx equalization setting, and GPIO behavior are changeable via firmware. VL819i also features an optionally configurable USB Charging Controller for charging various devices such as smartphones and tablets that can be configure on a per-port basis.
VL819i-based hub devices work under Windows, Mac OS X, and various Linux kernels without additional drivers. VL819i -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.
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