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The Most Comprehensive Knowledge Of All The USB Port Types

Jul. 23, 2021

Just last weekend, while I was busy moving, I got a call from my mom asking me what kind of cable would connect her old Android phone to dad's new car, because the USB-B to USB-C cable the salesman sold her, didn't seem right.


"Ah!" I thought to myself, if I answered, "Look for a box that says 'USB-A to USB-Micro' cable," it would be like a Harvard entrance exam question for my mom. Me,  from AIKE  ELECTRONICS, realized it was a topic worth sharing...... 

all types of ports

All Types A

When USB first appeared, there were only two types of connectors, called USB-A and USB-B. Some peripherals, such as mice and keyboards, have integrated cables with USB-A connectors on the end that plug into the computer. In this case, the computer supplies power to the peripheral device, and the peripheral device in turn supplies data to the computer.

When it comes to peripherals such as printers and some external hard drives, a USB-A to USB-B cable may be used to connect the two devices together. In this case, the rectangular USB-A connector plugs into the host computer, while the square USB-B connector plugs into the peripheral device. 

A kind

All Types B

The data transfer rates achievable with the original USB (now called USB 1.x) were quite good according to the standards of the 1990s, but they soon began to lose momentum as users wanted to transfer more and more data. The significantly faster USB 2.0 specification was released around the year 2000. It uses the same physical connector as USB 1.x. 

B kind

blue USB 3.x

In 2008, the significantly faster USB 3.0 was released, followed by USB 3.1 in 2013. if you look at a USB-3.x Type-A port on your computer, you'll see that it's blue on the inside; if it's not blue, it's not USB 3.x. 

In 2012, Apple introduced the Lightning connector to replace the 30-pin dock connector on its mobile devices (iPod, iPad, iPhone). In addition to its small size, one of the great things about the Lightning connector is that it's non-polarized, which means you can connect it any way you want.

New Types: C

Meanwhile, the USB folks continued their research in the background with the introduction of USB Type-C in 2014. In addition to supporting higher power distribution and the same high-speed communication as USB 3.x, the USB-C connector is also non-polarized. That means you can charge in both directions.

C kind.jpg

Later, my mom asked me what phones are type c charging ports (she wanted something besides Apple), because she was fed up with this having micro USB charging ports and always having to plug them in several times before linking them when plugging in her phone!!! Today's Type-c interface, whether positive or negative plug can be inserted directly, saving a lot of time and effort, which is why she likes type-c, right?

In addition to the positive and negative, type-c interface is not only compatible with older versions of USB2.0/3.0, but also supports the USB3.1 standard, faster data transfer rates up to 10Gbps. at the same time, the slimness of its port, portability, scalability, coupled with the vigorous promotion of the crowd of manufacturers, making the interface of the device gradually unified, so it has become the most mainstream smartphone interface now.


USB AM 2.0 to Type C (USB-C) Male Cable   VSUSB AM 3.0 to Type C (USB-C) Male Cable


In the near future, everything will have USB-C connectors and we will be using USB-C to USB-C cables for all our (small device) power and data needs. You can expect USB-C connections to replace all the old USB-A connections and other ports. However, this conversion may take several years. 

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