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2nd Magnetic USB Cable Comes!!!
Shenzhen Chevytech Co.,Limited | Updated: Jul 19, 2016

USB Type-C (or USB-C)

Physically, the Type-C port and connector is about the same size as that of the Micro-B USB mentioned above. A Type-C port measure just 8.4mm by 2.6mm. This means it's small enough to work for even the smallest peripheral devices. With Type-C, a USB cable's both ends will be the same, allowing for reversible plug orientation. You also don't need to worry about plugging it in upside down.


A compatible Type-C USB cable from Aukey that has a Type-A end. Dong Ngo/CNET


Set to be widely available starting 2015, Type-C USB will support USB 3.1 with the top speed of 10Gbps and has much high power output of up to 20V(100W) and 5A. Considering most 15-inch notebook computers require just around 60W of power, this means in the future laptop computers can be charged the way tablets and smartphones are now, via their little USB port. In fact Apple's latest 12-inch Macbook is the first notebook that incorporates a Type-C USB as its power port.

Going forwards, USB-C will enable storage vendors to make bus-powered (no separate power adapter required) external hard drives of much larger capacity, since it provides enough power to run one or even multiple desktop hard drives. 

Type-C USB also allows for bi-directional power, so apart from charging the peripheral device, when applicable, a peripheral device could also charge a host device. All this means you can do away with an array of proprietary power adapters and USB cables, and move to a single robust and tiny solution that works for all devices. Type-C USB will significantly cut down the a amount of wires currently needed to make devices work.


Proprietary USB

Not all devices use standard USB cables mentioned above. Instead, some of them use a proprietary design in the place of the Type-B plug and connector. The most famous example of these devices are the iPhone and the iPad, where either a 30-pin or lightning connector takes place of the Type-B end. The Type-A end, however, is still the standard size. 


USB revisions


Top speedMax power outputPower directionCable configurationAvailability
USB 1.112Mbps2.5V, 500mAHost to peripheralType-A to Type-B1998
USB 2.0480Mbps2.5V, 1.8AHost to peripheralType-A to Type-B2000
USB 3.05Gbps5V, 1.8AHost to peripheralType-A to Type-B2008
USB 3.110Gbps20V, 5ABi-directionalType-C both ends, reversible plug orientation2015


USB versions

USB 1.1: Released in August 1998, this is the first USB version to be widely adopted (the original version 1.0 never made it into consumer products). It has a top speed of 12Mbps (though in many cases only performs at 1.2Mbps). It's largely obsolete.

USB 2.0: Released in April 2000, it has a max speed of 480Mbps in Hi-Speed mode, or 12Mbps in Full-Speed mode. It currently has the max power out put of 2.5V, 1.8A and is backward-compatible with USB 1.1.

USB 3.0: Released in November 2008, USB 3.0 has the top speed of 5Gbps in SuperSpeed mode. A USB 3.0 port (and connector) is usually colored blue. USB 3.0 is backward-compatible with USB 2.0 but its port can deliver up to 5V, 1.8A of power.

USB 3.1: Released in July 26, 2013, USB 3.1 doubles the speed of USB 3.0 to 10Gbps (now called SuperSpeed+ or SuperSpeed USB 10 Gbps), making it as fast as the original Thunderbolt standard. USB 3.1 is backward-compatible with USB 3.0 and USB 2.0. USB 3.1 has three power profiles (according to USB Power Delivery Specification), and allows larger devices to draw power from a host: up to 2A at 5V (for a power consumption of up to 10W), and optionally up to 5A at either 12V (60W) or 20V (100W). The first USB 3.1 products are expected to be available next year, and will mostly use USB Type-C design.


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