USB cable

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The result of scientists' efforts are smartphones that can be used not only for their intended purpose, but also as mini-computers. It is also possible to fill the device with information directly via the internet or to use the resources of other devices. In the second case, a USB cable is needed to transfer data from one device to another.

A USB cable is a common accessory that is usually used to connect various devices. The product is a cable whose ends are equipped with special connectors to connect devices and provide the activity channel required for information transfer. The cable allows you to connect a smartphone to a computer or laptop and some tablet models. Once the devices are connected, information can be downloaded from the phone to the computer and vice versa.

To ensure that the cable provides a smooth flow of information to the device without fading or interruption, you should consider the following points when selecting a cable:
Length of the product. The longer it is, the more nuances need to be gathered and checked, so a shorter product is more suitable for the layman. Also make sure the length matches the markings on the wire.
Type of connector. This can be type A, B or C, mini, standard or micro. Some models have both A and B connectors.

Connector types:

There are different versions of USB connectors, and each has its own purpose.

  • Type A is the standard flat, rectangular connector found on one side of most USB cables. This type of connector is found on game consoles, TVs, keyboards, flash drives, etc.
  • Type B is a more square connector used for printers, scanners and other powered devices connected to a computer. Rarely used as most devices have moved to a more compact connection.
  • Mini - B is a smaller connector type that was the standard connector for mobile devices for a long time (until Micro USB came along). Today it is found on some cameras, players, PS3 controllers, digital cameras, etc.
  • Micro - B was the most widespread in recent years. Most smartphones used this type of connection until Type C came along. Still current today.
  • Type C is a new USB standard that has faster data transfer speeds and more power compared to previous formats and can be plugged in on both sides. Today it can be found in new MacBook laptops, some mobile phones and Nintendo Switch Pro controllers. USB C is suitable for data transfer as well as powering devices, screen output and other functions. Unlike Type A, USB C is the same at both ends of the cable, which allows for maximum power usage. But USB C to USB A cables are also popular because of their compatibility with older devices.
  • The standard hasn't been adopted everywhere yet, so it's only found on certain device models, and you often have to buy adapters.
  • Lightning - not a standard USB, but is used by Apple for its devices (iPhone, iPad, AirPods). Similar to USB-C, this connector is also bidirectional.

 

The main types of USB speed (USB data transfer rates):

  • USB 1.0 (Full Speed USB) - the first speed standard that is no longer used anywhere
  • USB 2.0 (Hi-Speed USB) - One of the modern standards that includes support for mini and micro cables, OTG and a few others. Represents the slowest speed to date. It is found on cheap flash drives, mice, keyboards and other similar devices. Most PCs have multiple USB 2.0 inputs
  • USB 3.0 is currently the fastest USB standard and has a higher speed. Often found on hard drives and high quality USB sticks. It can be recognised by its blue colour or the SS (Super Speed) symbol. Most modern computers have at least one USB 3.0 port
  • It is possible to use a USB 2.0 port on a USB 3.0 port and vice versa, but the higher speed of the new format is not exploited. Note that the micro USB cable is different for 2.0 and 3.0.
  • To understand USB data transfer rates, you need to know a little about the design of the USB C connector. A USB Type-C connector has four pairs of pins called "lanes" that transmit (TX) and receive (RX) data (see highlighted pins in Figure 1 below). USB 3.0 (5 Gbit/s) and USB 3.1 (10 Gbit/s) use one TX lane and one RX lane, depending on the orientation of the connector. USB 3.2 uses all four lanes to achieve a data rate of 20 Gbit/s
     

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