The three sizes of USB connectors are the default or standard format intended for desktop or portable equipment, the mini intended for mobile equipment, and the thinner micro size, for low-profile mobile equipment such as mobile phones and tablets. USB has been selected as the standard charging format for many mobile phones, reducing the proliferation of proprietary chargers.Ĭomparison of USB connector plugs, excluding USB-C type plugs 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.
All versions of USB specify cable properties version 3.X cables include additional data paths. Higher-speed development of the USB standard gave rise to another family of connectors to permit additional data paths. The initial versions of the USB standard specified connectors that were easy to use and that would have acceptable life spans revisions of the standard added smaller connectors useful for compact portable devices. Type-A receptacle (inverted, so the contacts are visible.(This strongly resembles the 8-pin Micro-B plug which often has only 5 pin positions occupied.) 8-pin Mini-B plug, a proprietary connector used on many older Japanese cameras for both USB and analog AV output.
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