22 Facts About USB hardware

Higher-speed development of the USB hardware standard gave rise to another family of connectors to permit additional data paths.

The USB hardware standard included power supply to peripheral devices; modern versions of the standard extend the power delivery limits for battery charging and devices requiring up to 100 watts.

USB hardware has been selected as the standard charging format for many mobile phones, reducing the proliferation of proprietary chargers.

Three sizes of USB hardware connectors are the default or standard format intended for desktop or portable equipment, the mini intended for mobile equipment, which was deprecated when it was replaced by the thinner micro size, all of which were deprecated with the release of Type-C.

USB hardware devices have some choice of implemented modes, and USB hardware version is not a reliable statement of implemented modes.

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Unlike other data buses, USB hardware connections are directed; a host device has "downstream" facing ports that connect to the "upstream" facing ports of devices.

Connectors the USB hardware committee specifies support a number of USB hardware's underlying goals, and reflect lessons learned from the many connectors the computer industry has used.

The USB hardware specification requires that the cable plug and receptacle be marked so the user can recognize the proper orientation.

USB hardware standard specifies tolerances for compliant USB hardware connectors to minimize physical incompatibilities in connectors from different vendors.

The USB hardware specification defines limits to the size of a connecting device in the area around its plug, so that adjacent ports are not blocked.

Mini-B connectors are still supported, but are not On-The-Go-compliant; the Mini-B USB hardware connector was standard for transferring data to and from the early smartphones and PDAs.

Thinner Micro-USB hardware connectors were intended to replace the Mini connectors in devices manufactured since May 2007, including smartphones, personal digital assistants, and cameras.

Micro-USB hardware was endorsed as the standard connector for data and power on mobile devices by the cellular phone carrier group Open Mobile Terminal Platform in 2007.

Micro-USB hardware was embraced as the "Universal Charging Solution" by the International Telecommunication Union in October 2009.

In Europe, micro-USB hardware became the defined common external power supply for use with smartphones sold in the EU, and 14 of the world's largest mobile phone manufacturers signed the EU's common EPS Memorandum of Understanding.

USB hardware cables exist with various combinations of plugs on each end of the cable, as displayed below in the USB hardware cables matrix.

USB hardware On-The-Go introduces the concept of a device performing both master and slave roles.

Intent is to permit uniformly charging laptops, tablets, USB hardware-powered disks and similarly higher-power consumer electronics, as a natural extension of existing European and Chinese mobile telephone charging standards.

On Dell, HP and Toshiba laptops, sleep-and-charge USB hardware ports are marked with the standard USB hardware symbol with an added lightning bolt or battery icon on the right side.

Some USB hardware devices require more power than is permitted by the specifications for a single port.

USB hardware devices are required to automatically enter ultra low-power suspend mode when the USB hardware host is suspended.

Examples include USB hardware-powered keyboard lights, fans, mug coolers and heaters, battery chargers, miniature vacuum cleaners, and even miniature lava lamps.