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Mobile Casting

Wireless USB-C Video Solution

Many laptops, tablets and phones only have USB-C, so casting starts with finding an adapter, and every visitor brings a different device. This design turns the TX into a USB-C dongle: a USB-C (DP Alt Mode) to HDMI chip on the carrier board feeds video to the module. Plug it into a device that supports video output over USB-C and cast; the RX outputs HDMI to a large display or portable monitor.

Guest casting in meeting roomsShowroom and trade-show demosClassrooms and training roomsLaptop to portable monitorTablet to large display
PAIN POINTS

Pain Points

01

Devices with USB-C only

Thin laptops and tablets often have just one or two USB-C ports, and the HDMI cable on the table does not fit. People hunt for an adapter before the meeting, and if none turns up they copy files to someone else's laptop to present.

02

Every visitor brings something different

Meeting rooms and showrooms host whatever devices visitors bring, across many brands, operating systems and ports. Keeping an adapter and driver for each one is impractical, and failed connections regularly hold up meetings.

03

Cables across the table

Wired presenting means a cable running from the table to the wall or display, unplugged and replugged every time the presenter changes. Constant pulling wears the connectors, and the cable clutters the table or display stand.

SOLUTION

How We Solve It

Laptop / Tablet / Phone
▶
USB-C Dongle TX
▶
Wireless
▶
RX
▶
Display

USB-C dongle: plug in and cast

The TX is built as a USB-C dongle with a USB-C (DP Alt Mode) to HDMI chip on its carrier board. Plug it into the device and the picture goes wirelessly to the RX, with no HDMI cable or adapter to find.

Paired at the factory, nothing to set up

TX and RX ship as a pre-paired set and link automatically at power-up, so visitors install no software and configure no network. The RX reads the display's real EDID and passes it back to the source, which cuts down on black screens, missing audio and downscaled output.

HDMI out at the RX, with audio

The RX outputs HDMI to a meeting-room display, projector or portable monitor. Embedded HDMI audio travels with the video, and the RX also has an analog audio output that switches over automatically when headphones are plugged in.

Touch, keyboard and mouse back to the source

Touchscreens, keyboards, mice and other USB HID devices connected to the RX are passed back over the link and recognized by the source as local USB devices, with no drivers. People can work the source from the display side.

Plug in and castDP Alt ModeConverted on carrier board
SELECTION

Selection & Design Notes

  1. Not every USB-C device supports video output (DP Alt Mode), and many phones do not. Say so clearly in your product documentation.
  2. Whether the system reaches 4K60 depends on the USB-C to HDMI chip you choose, so check its specs before committing the carrier board design.
  3. Keep the VBUS supplied to the module within 3.7 to 5.1 V. Anything above 5.1 V will damage it.
  4. On the 4K60 models the TX and RX need separate carrier boards because their pinouts differ. On the 4K30 models the TX and RX can share one board.
  5. Pick a wireless range tier for the site (roughly 30-100 m, 100-300 m or 300-1000 m). The range tier does not affect resolution.
FAQ

FAQ

Q1Will every phone work with the USB-C dongle?
No. The device's USB-C port must support video output (DP Alt Mode), and many phones do not. A device without it shows no picture through the dongle, so state the requirement in your product documentation.
Q2Can the USB-C design run at 4K60?
With the 4K60 models (ATE9460 / ATE9461), the wireless link itself carries 4K60. Whether the finished product reaches 4K60 also depends on the USB-C to HDMI chip on your carrier board and on what the source device can output.
Q3What does an end user need to set up?
Nothing. TX and RX ship pre-paired and link automatically at power-up. Plug the dongle into a device that supports video output and the picture appears.
Q4Can you build the USB-C casting adapter as OEM / PCBA?
Yes. We design the boards to your form factor, interfaces and range, handle ODM development and PCBA production, and offer white-label OEM; or buy the modules and design the carrier yourself. Validate link, range and picture with the ATE946X-KIT before prototyping.

Get a Recommendation for Your Project

Tell us the resolution, range and interfaces you need. We reply with the module set, carrier-board documents and sample pricing.

Send Requirements Start with the Kit
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