USB Type-C Trend is Really Coming

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This article will talk about some technical specifcations first then will talk about the trend in the end. Do you know the USB Type-C (or USB-C) connector was inspired by Apple’s Lightning? Check below picture from Apple’s old patent filings, this is an Apple Lightning connector, 2 Piano keys boards in the red circles (8 pins for each side) are the signal receivers inside your iPhone jack, but both of them have the same functions of signal transmission, which means when you plug in either side of Lightning cable, only one side is working*. The cost is lower than Type C and the durability is better. However, it provided a brand new experience of dual orientation charging cable in the time iPhone 5 launched, but it also restrained the bandwidth of transmission, because only 8 pins were working.

Healson digital handheld probe type ultrasound machine is with USB type C port which can be connected to smart devices such as tablet and smart phone. This portable utrasound machine is released by Healson technology and have good feedback from users. 



On the other hand, Type C uses an expensive way to fulfill this “reversible” function. All of its 24 pins can function, so how it can distinguish which side is the right side? It uses the female side’s pin D+ (A6, B6) and pin D- (A7, B7) to detect the male side’s pin D+ (A6) and pin D-(A7). In below picture, you can find the male side has only one set of D-/D+ pins, therefore, when you plug in, the female side will automatically switch to the right path. That is why the pins in both sides are symmetric. Ground to ground, Vbus to Vbus... At last but not least, this kind of mechanical design for plug (Receptacle’s tongue has to be wrapped by plug’s shell) requires extremely strong metal cover for protection, so do not “buy or sell” cheap Type C cable, if you value your quality image, especially for the applications for Laptop or iPad Pro charging.


(Source: Wikipedia)


Now let’s talk about why all platforms start to support Type C. First of all, it has 24 pins  (lightning has 16 pins, micro-USB has only 5 pins), so it can satisfy all kinds of expending demands, such as HDMI 2.0, DVI, DisplayPort 1.3, USB3.1, USB PD (Power Deliver), besides, it has 2 extra pins for further usages. Second, Fast charging trend is coming on mobile phone application, in the meantime, wireless “fast” charging still has a long long way to go. The micro-USB cannot welly support QC3.0 (Qualcomm quick charge). This is the most critical reason, because low price micro-USB cables and Andriod devices are everywhere. If you use a cheap and old micro-USB cable on QC3.0 devices for fast charging, there will be high possibility to see firework in your house, like Galaxy Note7. More than that, Type C is smaller, thinner and is cleaner cut, compare with micro-USB. Although Type C is a little bigger than Lightning.


(Source: AndroidPIT, 2017)


If you observe the 3C market well, new desktops start having more than 1 Type C port and new laptop start supporting Type C expending, then I can assure you that the Type C trend is really forming. I don’t mean Type C will replace lightning, but Apple will have more portable devices to support Type C for fast charging, and micro-USB will suddenly disappear after 2 years. USB2.0 and USB3.0 ports’ quantities will less than Type C ports on PC devices. However, Type C docking for New Macbook Air is very popular recently (Click Here). Check for more Type C products (Click Here). 


Type C Trend:

(Source: Matebook X from HUAWEI, iPad Pro from Apple, GP62 from MSI, USB-C Power Adapter from Ebay)


(Source:, 2017)



* Here it indicates E75/C48 version, it supports maximum 5Gbs (equals to USB3.0 level) 5.2V/2.4A. In new version of E77/C10 (Lightning to Type C adapter for iPad Pro), all of 16 pins have full function, so it can support maximum 12Gbps, 14.5V /2A (29W QC).



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2017/08/30 15:30
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