Micro-USB pinout and list of compatible smartphones and other devices". pinoutsguide.com. Archived from the original on October 10, 2013. What Is the USB 3.0 Cable Difference". Hantat. May 18, 2009. Archived from the original on December 11, 2011 . Retrieved December 12, 2011. Universal Serial Bus Revision 3.1 Specification". USB.org. USB Implementers Forum. Archived from the original (ZIP) on 21 November 2014 . Retrieved 19 November 2014.

McVay, Bob (15 September 2011). "Understanding USB 3.0 in Windows 8 | Build2011 | Channel 9". Channel9.MSDN.com . Retrieved 19 January 2014. The VBUS, D−, D+, and GND pins are required for USB2.0 communication. The five additional USB3.0 pins are two differential pairs and one ground (GND_DRAIN). The two additional differential pairs are for SuperSpeed data transfer; they are used for full duplex SuperSpeed signaling. The GND_DRAIN pin is for drain wire termination and to control EMI and maintain signal integrity.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.

Intel released its first chipset with integrated USB 3.0 ports in 2012 with the release of the Panther Point chipset. Some industry analysts have claimed that Intel was slow to integrate USB 3.0 into the chipset, thus slowing mainstream adoption. [33] These delays may be due to problems in the CMOS manufacturing process, [34] a focus to advance the Nehalem platform, [35] a wait to mature all the 3.0 connections standards (USB 3.0, PCIe 3.0, SATA 3.0) before developing a new chipset, [36] [37] or a tactic by Intel to favor its new Thunderbolt interface. [38] Apple, Inc. announced laptops with USB 3.0 ports on 11 June 2012, nearly four years after USB 3.0 was finalized. The USB-C connector supersedes all earlier USB connectors and the Mini DisplayPort connector. It is used for all USB protocols and for Thunderbolt (3 and later), DisplayPort (1.2 and later), and others. Developed at roughly the same time as the USB3.1 specification, but distinct from it, the USB-C Specification 1.0 was finalized in August 2014 [24] and defines a new small reversible-plug connector for USB devices. [25] The USB-C plug connects to both hosts and devices, replacing various Type-A and Type-B connectors and cables with a standard meant to be future-proof. [24] [26] Europe gets universal cellphone charger in 2010". Wired. June 13, 2009. Archived from the original on August 18, 2010 . Retrieved June 22, 2010. Connectors [ edit ] Comparison of legacy USB connector plugs, omitting the current standard Type-C plugs

Unlike previous standards, the USB3.0 standard does not specify a maximum cable length, requiring only that all cables meet an electrical specification: for copper cabling with AWG 26 wires, the maximum practical length is 3 meters (10ft). [13] Power and charging [ edit ] Per the base specification, any device attached to a standard downstream port (SDP) must initially be a low-power device, with high-power mode contingent on later USB configuration by the host. Charging ports, however, can immediately supply between 0.5 and 1.5A of current. The charging port must not apply current limiting below 0.5A, and must not shut down below 1.5A or before the voltage drops to 2V. [50] Pros Seem to Outdo Cons in New Phone Charger Standard". News.com. September 20, 2007 . Retrieved November 26, 2007. Battery Charging Specification, Revision 1.1". USB Implementers Forum. April 15, 2009. Archived from the original on March 29, 2014 . Retrieved September 23, 2009. 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.