A bus-powered hub is a high-power device providing low-power ports. It draws 1 unit load for the hub controller and 1 unit load for each of at most 4 ports. The hub may also have some non-removable functions in place of ports. A self-powered hub is a device that provides high-power ports by supplementing the power supply from the host with its own external supply. 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. Universal phone charger standard approved—One-size-fits-all solution will dramatically cut waste and GHG emissions". ITU (press release). Pressinfo. 22 October 2009. Archived from the original on 5 November 2009 . Retrieved 4 November 2009. a b "USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector" (PDF). October 20, 2000. Archived from the original (PDF) on April 12, 2015 . Retrieved April 28, 2019– via www.usb.org. On January 8, 2018, USB-IF announced "Certified USB Fast Charger" logo for chargers that use "Programmable Power Supply" (PPS) protocol from the USB Power Delivery 3.0 specification. [70] Micro-USB was embraced as the "Universal Charging Solution" by the International Telecommunication Union (ITU) in October 2009. [18]

USB ports and connectors are often color-coded to distinguish their different functions and USB versions. These colors are not part of the USB specification and can vary between manufacturers; for example, the USB3.0 specification mandates appropriate color-coding while it only recommends blue inserts for Standard-A USB3.0 connectors and plugs. [8] Connector types [ edit ] USB-IF Introduces Fast Charging to Expand its Certified USB Charger Initiative". January 9, 2018 . Retrieved January 10, 2018.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] Peripheral Connectivity: USB cables are used to connect various peripheral devices to a computer, such as printers, scanners, keyboards, mice, game controllers, webcams, and external monitors.

Micro-USB was endorsed as the standard connector for data and power on mobile devices by the cellular phone carrier group Open Mobile Terminal Platform (OMTP) in 2007. [17] The Type-B plug: This plug has a near square cross-section with the top exterior corners beveled. As part of a removable cable, it inserts into an upstream port on a device, such as a printer. On some devices, the Type-B receptacle has no data connections, being used solely for accepting power from the upstream device. This two-connector-type scheme (A/B) prevents a user from accidentally creating a loop. [9] [10]The Chinese technical standard: "YD/T 1591-2006, Technical Requirements and Test Method of Charger and Interface for Mobile Telecommunication Terminal Equipment" (PDF). Dian yuan (in Chinese). Archived from the original (PDF) on 15 May 2011. Similarly, mini USB cables are also used to connect radio scanners to computers or power sources. They facilitate the transfer of programming data, firmware updates, and power supply for the scanner. This allows users to customize and update their radio scanner's settings, frequencies, and channels conveniently. Hruska, Joel (13 March 2015). "USB-C vs. USB 3.1: What's the difference?". ExtremeTech. Archived from the original on 11 April 2015 . Retrieved 9 April 2015. Mini USB cables have been widely used for connecting and powering various electronic devices, including sat nav systems and radio scanners. These cables feature a compact design with a mini USB connector on one end and a standard USB connector on the other, allowing for seamless connectivity to different devices.

The 24-pin double-sided connector provides four power–ground pairs, two differential pairs for USB2.0 data (though only one pair is implemented in a USB-C cable), four pairs for SuperSpeed data bus (only two pairs are used in USB 3.1 mode), two "sideband use" pins, V CONN +5V power for active cables, and a configuration pin for cable orientation detection and dedicated biphase mark code (BMC) configuration data channel. [27] [28] Type-A and Type-B adaptors and cables are required for older hosts and devices to plug into USB-C hosts and devices. Adapters and cables with a USB-C receptacle are not allowed. [29]

Order Approval

Lam, Crystal; Liu, Harry (October 22, 2007). "How to conform to China's new mobile phone interface standards". Wireless Net DesignLine. Archived from the original on May 14, 2014 . Retrieved June 22, 2010. Universal Serial Bus 2.0 Specification, Section 7.2.1.3 Low-power Bus-powered Functions" (ZIP). usb.org. 27 April 2000. Archived from the original on 10 September 2013 . Retrieved 11 January 2014.

Universal Serial Bus Type-C Cable and Connector Specification, Release 2.2. USB Implementers Forum (Technical report). USB 3.0 Promoter Group. October 2022 . Retrieved April 12, 2023. One size-fits-all mobile phone charger: IEC publishes first globally relevant standard". International Electrotechnical Commission. February 1, 2011. Archived from the original on January 3, 2012 . Retrieved February 20, 2012. 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. Higher-speed development of the USB standard gave rise to another family of connectors to permit additional data paths. All versions of USB specify cable properties; version 3. x cables include 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 240 watts. USB has been selected as the standard charging format for many mobile phones, reducing the proliferation of proprietary chargers. Mini USB connectors are found in some portable electronic devices like cameras and video game controllers. However, micro USB has commonly replaced many mini USB connectors. USB Versions The 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 in USB 3.2 in favor of Type-C. There are five speeds for USB data transfer: Low Speed, Full Speed, High Speed (from version 2.0 of the specification), SuperSpeed (from version 3.0), and SuperSpeed+ (from version 3.1). The modes have differing hardware and cabling requirements. USB devices have some choice of implemented modes, and USB version is not a reliable statement of implemented modes. 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 thinner Micro-USB connectors were intended to replace the Mini connectors in devices manufactured since May 2007, including smartphones, personal digital assistants, and cameras. [15] a b Universal Serial Bus 3.0 Specification: Revision 1.0. June 6, 2011. p.531. Archived from the original on December 30, 2013 . Retrieved April 28, 2019. Ngo, Dong (August 22, 2014). "USB Type-C: One Cable to Connect Them All". c|net. Archived from the original on March 7, 2015 . Retrieved December 28, 2014. Universal Serial Bus Revision 3.0 Specification, Sections 3.1.1.1 and 5.3.1.3". Usb.org. Archived from the original (ZIP) on 19 May 2014 . Retrieved 28 April 2019. It's important to note that USB cables can have different versions, such as USB 2.0, USB 3.0, USB 3.1, and USB 3.2, which determine their maximum data transfer speeds. The USB cable you need will depend on the specific devices you want to connect or charge. Where are USB cables used?