20 Facts About Mini USB

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

The Mini 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.

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

Three sizes of USB 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.

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

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

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

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

Standard USB has a minimum rated lifetime of 1,500 cycles of insertion and removal, the mini-USB receptacle increases this to 5,000 cycles, and the newer Micro-USB and USB-C receptacles are both designed for a minimum rated lifetime of 10,000 cycles of insertion and removal.

The Mini USB 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.

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

In Europe, micro-Mini USB 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.

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

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

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

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

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