With the popularity of various digital devices, especially mobile phones and tablets, the number of USB devices around us has gradually increased. Each mobile phone and tablet requires an adapter (charging head) to charge. However, although these devices use USB interface , the data cables of these devices are not exactly the same. If you go out with your friend and you can't find the adapter when your phone is about to run out of power, you can only buy a new one. After all, there are many brands, and these data cables are the same at one end of the PC, but when connecting to the device, various different interfaces are usually used for size considerations. Even if you look at the interfaces of the devices in your hands now, can you really call them their names? Make up for these possible missed knowledge today. Let’s learn about the definitions and differences between common USB, micro USB and Type-Ch! ! !
The three commonly used interfaces
Let’s take a look at the characteristics and differences of Type-c interface, USB, Micro, and USB:
Type-c interface: Commonly used on the bottom of a smartphone, used for charging, data transmission, etc.
Features: (The most common one is the wire of the iPhone~)
1. Thin: 0.83 cm long and 0.26 cm wide. The old USB port is 1.4 cm long and 0.65 cm wide.
2. Supports dual-sided insertion of USB interface, solving the big problem of "USB can never be plugged in accurately".
3. Fast speed: The maximum transmission rate is 10Gb per second. (Charge is fast~)
USB: The data transmission line connecting the computer to the device, including a computer interface and a mobile phone interface.
Features: Applied to information and communication products such as computers and mobile devices, and belongs to the interface technology in the PC field.
1. Convenient for computers to transmit data to the outside world.
2. Supports the device's plug-and-play and hot-plug functions.
Micro USB: Connection between various devices, data exchange, charging, etc.
Features: (Connect between various devices, performing data exchange, charging, etc.)
1. Portable: The interface is smaller, saving space.
2. It has a plug-in and unplugging life and strength of up to 10,000 times, and a blind plug-in structure design.
3. Supports the current OTG function of USB: it can provide charging and data transmission at the same time.
(1) Type-A: Standard version of USB interface
Type-A is our most common USB interface type and is commonly used on computers. But it has some significant problems: there are directional requirements. The connector (male port) must be inserted into the interface (female port) from a specific direction, but because the two sides of the USB male port are very close, this insertion process often goes wrong.
(2) Micro: USB standard for mobile devices
Currently, most Android phones use the Micro USB interface (i.e. USB Micro-B), which is still widely used in various mobile portable devices.
(3) Type-C: may become the mainstream
Type-C Although it has appeared for a short time, it can be foreseen that with the maturity of USB Type-C technology, various notebooks, tablets and even smartphones in the future will begin to popularize USB Type-C interface.
USB (Universal Serial Bus, abbreviated as USB), and it is abbreviated as "Serial Bus". The universal serial bus is a serial bus standard connecting computer systems with external device . It is also a technical specification for input and output interfaces. It is widely used in information and communication products such as personal computers and mobile devices. It is an interface technology applied in the PC field. The USB interface supports the device's plug-and-play and hot-swap functions. USB was jointly proposed by several companies such as Intel , Combat , IBM, Microsoft and other companies at the end of 1994.
The complicated interface system, coupled with the limitation of installing the driver and restarting it, will inevitably cause trouble for users. Therefore, it is inevitable to create a unified and hot-swap external transmission interface.It is a data transmission line for computer-connected devices, including a dual-head computer-type USB universal serial bus and a computer-type and 1 mobile phone.
Micro USB
Micro USB is a portable version of the USB 2.0 standard. It is smaller than the Mini USB interface used by some mobile phones, saves space, has a plug-in and unplugging life and strength of up to 10,000 times, and has a blind plug-in structure design. Micro-USB standard supports the current USB OTG function, that is, in the absence of a host (such as a personal computer), data transmission can be directly realized between portable devices, compatible with USB1.1 (low speed: 1.5Mb/s, full speed: 12Mb/s) and USB 2.0 (high speed: 480Mb/s), and provides data transmission and charging. It is especially suitable for high-speed (HS) or higher data transmission. It is the best choice for connecting small devices (such as mobile phones, PDAs, digital cameras, digital cameras, portable digital players, etc.). It can also provide convenience for the car. You only need a USB car charger and a MICRO USB data cable to charge the mobile phone emergency. And there is a 5V output interface directly on high-end cars and is connected to a MICRO USB cable to charge the phone. MICRO USB is widely versatile and easy to use.
Micro-USB is the next generation specification of Mini-USB. The definition of the Micro series includes the Micro-B series slots used for standard equipment; the Micro-AB slots used for OTG equipment; Micro-A and Micro-B plugs, and cables. What's unique about the Micro series is that they include a stainless steel shell, and it's no problem to plug and unplug it tens of thousands of times.
Type-Ch
Type-C interface, referred to as USB-Ch, is located at the bottom of a smartphone and is used for charging, data transmission and other purposes most of the time. The biggest feature of the Type-C double-sided pluggable interface is that it supports dual-sided insertion of USB interface, which officially solves the global problem of "USB can never be plugged in accurately", and plug in the front and back sides at will. At the same time, the USB data cable used with it must also be thinner and lighter.
1, USB Type-C 1. Ultra-thin appearance
Thinner body requires thinner ports, which is one of the reasons why USB-C came into being. The USB-C port is 0.83 cm long and 0.26 cm wide. The old USB port is 1.4 cm long and 0.65 cm wide, it looks outdated. This also means that the end of the USB-C data cable will be one-third of the size of the standard USB-A type data cable plug.
2, no forward and reverse
Like Apple's Lightning interface, the front and back of the USB-C port are the same. That is to say, no matter how you plug in this port, it is correct. Users don't have to worry about the positive and negative problems caused by traditional USB ports.
3, fast speed
Theoretically, the maximum transmission rate of the USB-C port is 10Gb per second. But Apple says the USB-C port of the new MacBook has a maximum transfer rate of 5Gbps. The maximum output voltage is 20 volts, which can speed up charging time. The USB-A model has so far the ultimate transmission rate is 5Gbps and the output voltage is 5V.
The emergence of the Type-C interface can be said to have saved obsessive-compulsive disorder and Virgo, and also allowed headache-inducing problems such as the "law of attraction" and "Murphy's Law" to disappear.
OK, although I know what functions the Type-C interface can implement and what it is, many people may have a question like being stuck in their throat, that is, "Why is it called Type-C? Where did A and B go?" Indeed, where did A and B go? This is indeed a good question. In addition, the following will discuss the development of USB standards and interfaces in depth to let everyone understand clearly.
find out all specifications USB interface
Since there is Type-C, there will definitely be Type-A and Type-B. What exactly Type-A and Type-B look like? You can see at a glance in the picture below:
From left to right are the standard Type-A interface, Type-B interface and Type-C interface. After reading the picture, you should suddenly realize: It turns out that the Type-A interface is the most commonly used standard USB interface! Indeed, the English name of the Type-A interface is "Standard Type-A USB", which means it is a standard USB interface, and other shapes of USB interfaces are its derivatives.
For the Type-B USB interface, although its appearance rate is far less than that of the standard Type-A interface, I believe everyone is familiar with it, because many external USB devices such as printers, monitor USB HUBs and other external USB devices use Type-B USB interfaces. Generally speaking, the USB interfaces on PC are standard Type-A, while external devices mostly use Type-B.
Finally, there is the newly released Type-C interface. It has a much smaller size than Type-A and Type-B, and its size is even comparable to Mini-USB and Micro-USB, making it the latest USB interface form factor standard. In addition, Type-C is an interface type that can be applied to both PC (master device) and external device (slave device), which is epoch-making. Let’s take a look at the Mini-USB and Micro-USB mentioned just now....
Don’t be dizzy after reading it: USB interface family photo
After the Type-C interface was released, a friend asked: “Is Mini-USB called Type-A, Micro-USB called Type-B, and the new one called Type-C?” In fact, the author has told you that this is not the case. After reading the family photo of the USB interface below, I believe everyone will understand.
USB interface family portrait (except Type-C)
Nothing is as intuitive as a picture. The Mini-USB and Micro-USB that we often use are all born based on the USB2.0 transmission protocol. What's amazing is that they are also divided into Type-A and Type-B respectively. In the USB3.0 era, due to the increase in transmission speed, only the Type-A USB3.0 interface remains the same as before, and both Type-B and Micro-USB have changed their appearance (increased in size).
Since Apple's MacBook first used the USB Type-C interface, the outside world has questioned whether Apple's radical use of such a "weird" interface will bring a lot of inconvenience to users? Unexpectedly, in less than a year, Android manufacturers launched devices using USB Type-C interfaces, and Apple once again successfully drove the development direction of the entire industry, like fingerprint recognition. To insert the USB flash drive at least 3 times before it can be successful? Do you have Apple fans and Android fans at home, and you can change the charging cable back and forth? Forgot to bring a converter when taking a tablet to a company meeting? Now, since the USB Type-C, these connection problems have not existed, after all, it may gradually become the mainstream interface in the next few years.
USB, micro USB and Type-Ch
For friends who don’t know, it is easy to think that USB and Type-C are two either-or existences, but this is not the case.
The mobile phone USB interface we usually refer to as micro USB, which can transmit data and charge the mobile phone.
This is also a data interface that mobile phones have been using in the past few years. This data transmission speed has been continuously improved, but the shape has not changed much.
10 years ago, there was still a considerable gap in the USB data cable models of various mobile phone brands, so the data cables between mobile phone manufacturers were not universal.
Since 2014 and 2015, most Android phones have used the same data interface, which also makes cross-using data cables between mobile phones more convenient and fast. Although the interface is the same, different phones have different interface directions. For example, Huawei's interface is forward, while Xiaomi's interface is reverse.
Type-C interface is actually a USB interface standard, and the Type-C interface is not the same as the commonly known USB3.1. Type-C is the interface standard, while USB 3.1 is the transmission standard.
The Type-C interface standard began to be recognized in 2015. In 2015, Apple applied the Type-C interface to MacBook. In 2016, the Type-C interface became popular, and major flagship mobile phones began to match the Type-C interface, abandoning the commonly used data interface. The first batch of mobile phones that support Type-C in China include ZUK Z1 and OnePlus 2.
The difference between micro USB and Type-C
micro USB and Type-C are both USB, and both have the functions of transmitting data and charging your phone. Their differences are mainly reflected in these aspects:
1, the appearance difference is obvious
micro USB is narrower than Type-C interface, but it has a stronger sense of heaviness. Although Type-C is relatively wide, it looks lighter and thin.
2. The direction design is different
Type-C interface does not have a distinction between forward and reverse directions, both forward and reverse can be inserted. Micro USB can be divided into front and reverse directions. Incorrect insertion will not only affect the cable plug itself, but also easily damage the mobile phone interface.
3. Differentiated transmission speed
micro USB specifications limit the output of the highest voltage and have limitations in charging technology. The Type-C interface solves the problem of port voltage limit, and the maximum output power has increased significantly. Increased charging speed.
In addition, Type-C's data transfer speed is much faster than micro USB.
micro USB or Type-C?
Although Type-C is more functional, it is still slightly worse in practicality. Because not all domestic mobile phones use Type-C interfaces, most mobile phones continue with the previous micro USB interface.
If you are away one day and forget to bring a Type-C data cable, charging will be very troublesome. On the contrary, a micro USB socket is much more convenient and quick, and it is easy to find a micro USB data cable.
In general, the application scope of the Type-C data cable is still limited by a functional data cable. It is expected that there will be more room for development in the future smartphone market.
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