Amazon Basics USB 2.0 A-Male to Micro B Cable, 3 feet, Black

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In June 2009, the European Commission organized a voluntary Memorandum of Understanding (MoU) to adopt micro-USB as a common standard for charging smartphones marketed in the European Union. The specification was called the common external power supply. The MoU lasted until 2014. The common EPS specification (EN 62684:2010) references the USB Battery Charging Specification and is similar to the GSMA/OMTP and Chinese charging solutions. [94] [95] In January 2011, the International Electrotechnical Commission (IEC) released its version of the (EU's) common EPS standard as IEC 62684:2011. [96] The standard connectors were designed to be more robust than many past connectors. This is because USB is hot-swappable, and the connectors would be used more frequently, and perhaps with less care, than previous connectors.

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chargers". EU: EC. 29 June 2009. Archived from the original on 23 October 2009 . Retrieved 22 June 2010. For a product developer, using USB requires the implementation of a complex protocol and implies an "intelligent" controller in the peripheral device. Developers of USB devices intended for public sale generally must obtain a USB ID, which requires that they pay a fee to the USB Implementers Forum (USB-IF). Developers of products that use the USB specification must sign an agreement with the USB-IF. Use of the USB logos on the product requires annual fees and membership in the organization. [12] History [ edit ] The basic USB trident logo [15] USB logo on the head of a standard Type-A (Standard-A) plugBefore the Battery Charging Specification was defined, there was no standardized way for the portable device to inquire how much current was available. For example, Apple's iPod and iPhone chargers indicate the available current by voltages on the D− and D+ lines. When D+ = D− = 2.0V, the device may pull up to 900mA. When D+ = 2.0V and D− = 2.8V, the device may pull up to 1A of current. [53] When D+ = 2.8V and D− = 2.0V, the device may pull up to 2A of current. [54] Accessory charging adapters (ACA) [ edit ] Micro-USB was embraced as the "Universal Charging Solution" by the International Telecommunication Union (ITU) in October 2009. [18] Low-power and high-power devices remain operational with this standard, but devices using SuperSpeed can take advantage of increased available current of between 150mA and 900mA, respectively. [30] :9–9 OMTP Local Connectivity: Data Connectivity". Open Mobile Terminal Platform. September 17, 2007. Archived from the original on October 15, 2008 . Retrieved February 11, 2009.

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Pros Seem to Outdo Cons in New Phone Charger Standard". News.com. September 20, 2007 . Retrieved November 26, 2007. The charging device identifies a charging port by non-data signaling on the D+ and D− terminals. A dedicated charging port places a resistance not exceeding 200Ω across the D+ and D− terminals. [50] :§ 1.4.7; table 5-3 High-speed USB2.0 hubs contain devices called transaction translators that convert between high-speed USB2.0 buses and full and low speed buses. There may be one translator per hub or per port. UAC 1.0 devices are still common, however, due to their cross-platform driverless compatibility, [70] and also partly due to Microsoft's failure to implement UAC 2.0 for over a decade after its publication, having finally added support to Windows 10 through the Creators Update on 20 March 2017. [73] [74] [72] UAC 2.0 is also supported by macOS, iOS, and Linux, [67] however Android only implements a subset of the UAC 1.0 specification. [75] Installing a device that relies on the USB standard requires minimal operator action. When a user plugs a device into a port on a running computer, it either entirely automatically configures using existing device drivers, or the system prompts the user to locate a driver, which it then installs and configures automatically.USB connectors have been increasingly replacing other types as charging cables of portable devices. The Wireless Association Announces One Universal Charger Solution to Celebrate Earth Day" (Press release). CTIA. 22 April 2009. Archived from the original on 14 December 2010 . Retrieved 22 June 2010.