Texas Instruments (TI) has unveiled the first single-chip DockPort interface
solution. The HD3SS2521 delivers audio/video (A/V), USB data and power over a single cable between a notebook, ultrabook or tablet PC and a docking station or dongle.
DockPort provides a lower cost alternative to proprietary implementations and
offers more features than standard USB docking stations. The HD3SS2521
controller enables DisplayPort, USB 3.0, USB 2.0 and power over a single
interconnecting cable, and provides the control logic and automatic switching
required on the cable's host side and dock side.
The HD3SS2521 enables system designers to create smaller, more affordable
docking stations that connect and synchronize computers with LCD monitors,
dongles, keyboard/mouse, Gigabit Ethernet, storage, audio speakers, DVD/Blu-ray
media player and smartphone.
Key features and benefits of the HD3SS2521:
- Single-cable solution: Bidirectional 2:1 switch manages DockPort detection, as
well as signal and power switching. It enables display, USB, power, and computer
docking interface over a single cable, which allows designers to create smaller,
more affordable docking stations.
- Reduced board size and BOM: Highly integrated 5-mm by 11-mm package reduces
board space by one-third and BOM costs by more than 50 percent, compared to
competitive implementations that provide data and A/V over a single
- Power and charging delivered over cable: Bidirectional power reduces the
number of connections by allowing upstream charging of host-side computers, or
downstream powering of one or more dongles.
- Multiple monitor support: Operating in two-lane mode with USB 3.0 data, the
HD3SS2521 supports one monitor with resolutions up to 4K2Kp at 30 frames per
second (fps) and 30 bits per pixel (bpp), or multiple monitors with resolutions
less than or equal to 1920 by 1200p at 60 fps. In four-lane mode with USB 2.0,
it supports the following configurations: 1) one 4K2Kp at 60 fps and 30 bpp, 2)
two 4K2Kp monitors at 30 fps and 30 bpp, or 3) four or more monitors with
resolutions less than or equal to 1920 by 1200p at 60 fps.
The HD3SS2521 is available in a 56-pin WQFN package for a suggested retail price
of US$1.85 in 1,000-unit quantities.