USB


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USB

Universal Serial Bus: a standard for connection sockets on computers and other electronic equipment

USB

(computer science)

USB

(architecture)

USB

(communications)

USB

(1) See USB drive and USB port.

(2) (Universal Serial Bus) USB is a hardware interface for up to 127 peripherals that is governed by the USB Implementers Forum (see USB-IF). USB is used to attach keyboards, mice, printers, external storage and mobile devices to the computer. It is also used for charging a wide variety of portable products (see USB power). After debuting in 1997, USB soon replaced the earlier serial port, parallel port and Apple Desktop Bus.

Hot Swappable Drives
USB devices can be plugged and unplugged while the computer is on. This feature, combined with easy-to-reach ports on every computer, gave rise to the ubiquitous USB drive for transport (a manual "eject" is however required). See USB drive, USB device class, USB OTG, USB switch and USB toy.


Connecting via USB
Host sockets are Type A, and peripherals use B, Micro-B, Mini-B, USB-C and Lightning. In time, USB-C is expected to replace A, as well as every other USB connector. Today, some laptops have only USB-C ports, while all other computers have Type A. See USB Type C, USB hub, Mini USB, Micro USB and Lightning connector.


Connecting via USB
Host sockets are Type A, and peripherals use B, Micro-B, Mini-B, USB-C and Lightning. In time, USB-C is expected to replace A, as well as every other USB connector. Today, some laptops have only USB-C ports, while all other computers have Type A. See USB Type C, USB hub, Mini USB, Micro USB and Lightning connector.






USB 2.0 and SuperSpeed
SuperSpeed is 10 times faster than USB 2.0, and all modern computers support it. As indicated in the above chart, there are, unfortunately, multiple designations for the same speed. DisplayPort requires USB-C cables (see USB Type C). See USB-IF and USB 3.2.




USB 2.0              Data Rate

 USB 2.0 High Speed    480 Mbps
 USB 2.0 Full Speed     12 Mbps
 USB 2.0 Slow Speed    1.5 Mbps


 USB 3.2              Data Rate  LanesSuperSpeedUSB 3.2 Gen 1x1         5 Gbps   1
 (a.k.a. USB 3.0)
 (a.k.a. USB 3.1 Gen 1)

 SuperSpeed+USB 3.2 Gen 2x1        10 Gbps   1
 (a.k.a. USB 3.1
 (a.k.a. USB 3.1 Gen 2)

 USB 3.2 Gen 1x2**      10 Gbps   2
 USB 3.2 Gen 2x2**      20 Gbps   2
 ** Dual-lane requires USB-C cables


USB Is Often Power Only
USB is widely used as a power source for phones, tablets and other devices. This Chromecast streaming stick plugs into the TV's HDMI port but is powered by USB (see Chromecast and USB power). (Image courtesy of Google Inc.)



USB Is Often Power Only
USB is widely used as a power source for phones, tablets and other devices. This Chromecast streaming stick plugs into the TV's HDMI port but is powered by USB (see Chromecast and USB power). (Image courtesy of Google Inc.)
References in periodicals archive ?
The USB-C standard's 2.4-mm-high connector plug is also significantly smaller than the current 4.5-mm USB Standard-A connector, enabling easier integration for a wider range of devices.
And for people work with libraries of large image files, such as movies or pictures, the StoreJet 25MC is a high capacity portable hard drive with a reversible USB Type-C cable for the next generation devices that also feature Type-C ports.
This vendor has launched a new family of low-cost USB analog I/O modules--the USB-AIO family.
The SanDisk USB OTG 64GB pen drive offers the same features as the 32GB one which we mentioned earlier in the list.
As you can see in the table, USB 3.0 devices are more than 10 times faster than USB 2.0 devices, while USB 3.1 and 3.2 devices are 20 to 40 times faster than USB 2.0 devices.
A major misconception about USB Type-C on smartphones, however, is that data transfer speeds are extremely high.SPEED AND POWERThe USB Type-C simply refers to the physical connector shape or design it is not a new standard.
Alt Mode allows for protocols other than USB to be transferred over a USB connection, such as DisplayPort, HDMI, MHL or Thunderbolt over the Type-C interface.
Targus USB-C4-Port USB Hub (ACH224AP) is priced at Rs.
Firing -200V into the USB controller via the drive will typically cause critical damage to modern SoCs and can even lead to total destruction.
* The ability for each USB port to simultaneously provide correct charging currents of up to 2.1 A.
Well, sort of: We're already seeing some fragmentation in terms of the new USB-C connector, which could eventually replace USB, as well aswhat is thankfully turningout to be a short-lived obsession Samsung had with larger USB Micro-B connectors for its Galaxy line.