In September 2007, the Open Mobile Terminal Platform group (a forum of mobile network operators and manufacturers such as Nokia, Samsung, Motorola, Sony Ericsson, and LG) announced that its members had agreed on Micro-USB as the future common connector for mobile devices. As of 14June2007 [update], all new mobile phones applying for a license in China are required to use a USB port as a power port for battery charging. In addition to the above cable assemblies comprising two plugs, an "adapter" cable with a Micro-A plug and a standard-A receptacle is compliant with USB specifications.

The GSM Association (GSMA) followed suit on February 17, 2009, [88] [89] [90] [91] and on April 22, 2009, this was further endorsed by the CTIA – The Wireless Association, [92] with the International Telecommunication Union (ITU) announcing on October 22, 2009, that it had also embraced the Universal Charging Solution as its "energy-efficient one-charger-fits-all new mobile phone solution," and added: "Based on the Micro-USB interface, UCS chargers will also include a 4-star or higher efficiency rating—up to three times more energy-efficient than an unrated charger. To allow for voltage drops, the voltage at the host port, hub port, and device are specified to be at least 4. In addition to limiting the total average power used by the device, the USB specification limits the inrush current (i.

On some devices, the Type-B receptacle has no data connections, being used solely for accepting power from the upstream device. Cabling [ edit ] A USB twisted pair, in which the Data+ and Data− conductors are twisted together in a double helix. Standard USB has a minimum rated lifetime of 1,500 cycles of insertion and removal, [4] the Mini-USB receptacle increased this to 5,000 cycles, [4] and the newer Micro-USB [4] and USB-C receptacles are both designed for a minimum rated lifetime of 10,000 cycles of insertion and removal. provides two additional differential pairs (four wires, SSTx+, SSTx−, SSRx+ and SSRx−), providing full-duplex data transfers at SuperSpeed, which makes it similar to Serial ATA or single-lane PCI Express.

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. Optionally, the hub controller may draw power for its operation as a low-power device, but all high-power ports must draw from the hub's self-power. USB ports and connectors are often color-coded to distinguish their different functions and USB versions. If USB host commands are unanswered by the USB device within the allowed time, the host considers the command lost.The USB standard specifies tolerances for compliant USB connectors to minimize physical incompatibilities in connectors from different vendors. OTG devices attached either to a peripheral-only B-device or a standard/embedded host have their role fixed by the cable, since in these scenarios it is only possible to attach the cable one way. All current OTG devices are required to have one, and only one, USB connector: a Micro-AB receptacle. Power for USB4 operation is established and managed as defined in the USB Type-C Specification and the USB PD Specification. In 2022, the Radio Equipment Directive 2022/2380 made USB-C compulsory as a mobile phone charging standard from 2024, and for laptops from 2026.

The Micro-AB receptacle is capable of accepting Micro-A and Micro-B plugs, attached to any of the legal cables and adapters as defined in revision 1.They allow users to keep their sat nav devices charged and ready for use, ensuring uninterrupted guidance on the road. Whether you’re looking for a network cable or a pair of noise-cancelling headphones, you’ll find top-quality solutions here. Micro-USB connectors, which were announced by the USB-IF on January 4, 2007, [13] [14] have a similar width to Mini-USB, but approximately half the thickness, enabling their integration into thinner portable devices. The power configuration protocol can use BMC coding over the CC wire if one is present, or a 24MHz BFSK-coded transmission channel on the V BUS line. USB devices have some choice of implemented modes, and USB version is not a reliable statement of implemented modes.

provides for a maximum cable length of 5 meters (16ft 5in) for devices running at high speed (480Mbit/s). It is commonly used in point of sale systems to power peripherals such as barcode readers, credit card terminals, and printers. Modes are identified by their names and icons, and the specification suggests that plugs and receptacles be color-coded (SuperSpeed is identified by blue).The intent is to permit uniformly charging laptops, tablets, USB-powered disks and similarly higher-power consumer electronics, as a natural extension of existing European and Chinese mobile telephone charging standards.