22 Facts About USB connector

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

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

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

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

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

The USB connector mounted on the host or device is called the receptacle, and the USB connector attached to the cable is called the plug.

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

USB cables and small USB devices are held in place by the gripping force from the receptacle, with no screws, clips, or thumb-turns as other connectors use.

In standard USB, the electrical contacts in a USB connector are protected by an adjacent plastic tongue, and the entire connecting assembly is usually protected by an enclosing metal shell.

The USB connector 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 connector was standard for transferring data to and from the early smartphones and PDAs.

The Micro USB connector is designed to reduce the mechanical wear on the device; instead, the easier-to-replace cable is designed to bear the mechanical wear of connection and disconnection.

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

In Europe, micro-USB connector 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 connector cables exist with various combinations of plugs on each end of the cable, as displayed below in the USB connector cables matrix.

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

Intent is to permit uniformly charging laptops, tablets, USB connector-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 connector ports are marked with the standard USB connector symbol with an added lightning bolt or battery icon on the right side.

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

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

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