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What is an E-Marker

2023-03-31
An E-Marker (electronic marker) is a chip that is used in the latest USB connector iteration, USB Type-C, to communicate between power source and power sink devices. The chip is used to communicate with connected devices to ensure safe data and power delivery to and from the source and sink. The E-Marker provides the cable characteristics including the cable length, the maximum supported current and voltage, the type of USB signal, the vendor and product ID, any alternate mode support, and much more. An E-Marker is required on all USB Type-C cables that support 5 amps and/or exceed 60 watts of power carrying capability. USB Type-C cables that are expected to have data transfer rates above 480 Mbps, or High-speed USB 2.0, are also required to have an E-Marker chip embedded in the connectors of the cables. Applications that exceed 480 Mbps fall in the USB 3.1 realm, meaning any USB 3.1 Cable is going to, with very minimal exceptions, be required, by the USB-IF community, to include an E-Marker in the Type-C cable.

USB Type-C and Thunderbolt
Since the introduction of USB 3.0 version of the USB protocol and Type-C connectors, there has been a need to regulate how a cable works across all available applications. The Type-C cable was developed to simplify device connectivity and to create a cable that could be [universally" used across the majority of common applications. With its blazing fast transfer speeds of up to 10 Gbps, ability to continuously support up to 100W of power, and ultra-high video bandwidth capabilities, USB Type-C was built to make all other cables obsolete.


Universal Compatibility Jpg


Ucoax Type-C cable and power adapters

With such an ambitious mission the Type-C cable had to be made in a way to work across a multitude of different applications. For instance, HDMI has been the protocol that is used primarily in the transfer of video data. The USB protocol was not originally designed to handle the display and broadcast of video streams to a monitor or TV so originally this application used, almost exclusively, an HDMI Cable. Now however, USB Type-C and Thunderbolt are taking on the challenge of not only adding video streaming capabilities to the protocol but simultaneously powering the TV or monitor through a single cable input. This is an incredible feat and is extremely complex technically. With a single cable connection, one can not only stream ultra-high video content while also powering the device but they can also use that same cable to charge a smaller less demanding device such as headphones or a tablet. These two applications are governed by the same USB Power Delivery, or PD, protocol but require drastically different things from the same cable.

Ucoax OEM Cable Assembly

Usb4 Cable

About this item
More possibilities - This Usb 4 Cable for thunderbolt 4 cable compatibility with thunderbolt 3 /4 devices and hosts. It is also backward compatible with USB-C 3.2, 3.1, and 2.0 speeds and devices. Supports data transfer 2x faster than standard USB C thunderbolt cable.

240W Leading Fast Charging Technology - VCOM 240W USB4 Cable for thunderbolt 3 charging cable is the first cable with 240W fast charging technology on the market, which has upgraded the previous 60W and 100W cables and taken the charging speed to the next era.


Multi Core Coax Jpg


Powerful display support - This usb 4.0 cable for thunderbolt 3 cable can drive one 4K@60Hz displays at the same time.Notice: if you connect to USB C port for video output, please make sure your USB C device supports Display Port Alternate Mode (Alt Mode).

Very Durable - Our cable for usb 4 thunderbolt display cable Built in E-Marker smart chip to ensure more stable charging , 6.6FT(2.0 Meter)USB4 Cable to USB C with High-Quality aluminum alloy shell provides better heat insulation. Can withstand more than 30,000+/180 degree bends lifespan, ensuring more stable signal transmission.


Wide Compatibility - 100% USB-C Compatible,Compatible with your Thunderbolt 3 Windows PCs. The usb c data cable support Mac book Pro, iMac, iMac Pro, Mac book Air, Windows Thunderbolt 3 Laptop & PCs, Docking Stations, High Speed Storage and Peripheral Devices.

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