What is USB?

The term USB is an acronym – whose meaning is acronym pronounced as a Word and ending by the use by lexicalizar-Universal Serial Bus or Bus Universal Serial Bus equivalent name in Spanish. Created from Intel, together with Compaq, Digital Equipment Corporation, IBM, NEC, Microsoft, and Northern Telecom, which was released in its first specification 1.0 in 1996. It is an industry standard that required terminals, cables and protocols that are used on a bus for pcs, electronic and peripheral devices can communicate, connect and supply of electricity.

What is USB

Definition of USB

You can be considered the first definition of USB as a socket which is used on computers. Or put another way, you can set it as a port that has a high speed and that connects computers with peripherals. It supports 12 MBps transfers. And each such port can connect 127 peripherals such as printers, mouses, keyboards, among others.

However at present application refers to any electronic component, such as Blu-ray players Disc. But its greater importance given in smart phones, consoles, among others, since it replaced the proprietary connectors.


It is classified into:

Low speed (1.0) whose transfer rate of up to 1.5 Mbit/s is used in devices of human interface such as keyboard, mouse, etc.

Full speed (1.1): with a transfer rate of up to 12 Mbit/s.

High speed – HiSpeed (2.0): it has a transfer rate of up to 480 Mbit/s although its actual maximum rate of 280 Mbit/s. 2.0 cable has 4 lines, one pair for data and one for power.

Superhigh speed – SuperSpeed (3.0) that has a transfer rate of up to 4.8 Gbit/s. It is ten times faster than the 2.0 because 5 added contacts were introduced, and the fiber optic connector left side.

The second definition refers to the so-called USB memory, also popularly called pendrive which is a small external device used to store information or store data, using the USB port for data transfer. These pen drives are useful for the transport of information, which has led them to impersonate (now disused) diskettes, DVDs and CDs; they are also used as MP3 players. Storage capacity can range from 32 MB up to 60 GB.

These memories have several advantages, among them are: the resist dirt and scratches; they can be rewritten about a million times; When buying them, they are very cheap and can keep the information up to 10 years.

Usage examples and phrases

“You have connected your camera to the USB port to download the images in your notebook”. It refers in this case to one of the peripherals that use this type of port.

“The Licentiate in economy bought a USB stick to transfer the information of their clients to his office.” This example used as equivalent to the Flash drive to store data.

“It employs a USB OTG for connecting a mouse to your tablet”. It applies here referring to a specification of these devices that allows tablets to act as servers.