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. Voltage tolerance and limits [ edit ] Worst-case voltage drop topology of a USB 2.0 host to low-power device chain, at steady state Plummer, Gregg (20 September 2017). "Ampliozone: USB Audio Class 2.0 Support in Windows 10, FINALLY!!!!". Ampliozone. Archived from the original on 7 May 2018 . Retrieved 7 May 2018.

Upstream USB connectors supply power at a nominal 5V DC via the V_BUS pin to downstream USB devices. Bright, Peter (4 March 2019). "Thunderbolt 3 becomes USB4, as Intel's interconnect goes royalty-free". Ars Technica. Archived from the original on 13 February 2021 . Retrieved 4 March 2019. Universal Serial Bus ( USB) is an industry standard that allows data exchange and delivery of power between many various types of electronics. It specifies its architecture, in particular its the physical interface, and communication protocols for data transfer and power delivery to and from hosts, such as personal computers, to and from peripheral devices, e.g. displays, keyboards, and mass storage devices, and to and from intermediate hubs, which multiply the number of a host's ports. [2] USB was originally designed to standardize the connection of peripherals to computers, replacing various interfaces such as serial ports, parallel ports, game ports, and ADB ports, [3] and prior versions of USB became commonplace on a wide range of devices, such as keyboards, mice, cameras, printers, scanners, flash drives, smartphones, game consoles, and power banks. [4] [5] It has evolved into a standard to replace virtually all common ports on computers, mobile devices, peripherals, power supplies, and manifold other small electronics. In the current standard the USB-C connector replaces the many various connectors for power (up to 240W), displays (e.g. DisplayPort, HDMI), and many other uses, as well as all previous USB connectors.Various legacy USB and related connectors (left to right): USB Micro-B plug, proprietary UC-E6 plug, USB Mini-B plug, Standard-A-like receptacle (non-compliant), Standard-A plug, Standard-B plug. Shown with a centimeter ruler. Thunderbolt 3 uses USB-C cables; the USB4 specification allows hosts and devices and requires hubs to support interoperability with the standard using the Thunderbolt 3 Alternate Mode. The USB interface defines protocols for recovery from common errors, improving reliability over previous interfaces. [12] Powerbook Explodes After Comcast Plugs in Wrong Cable". Consumerist. 8 March 2010. Archived from the original on 25 June 2010 . Retrieved 22 June 2010. Includes new USB4 Gen2×2 (64b/66b encoding) and Gen3×2 (128b/132b encoding) modes and introduces USB4 routing for tunneling of USB3.2, DisplayPort1.4a and PCI Express traffic and host-to-host transfers, based on the Thunderbolt3 protocol; requires USB4 Fabric.

Battery Charging v1.2 Spec and Adopters Agreement" (ZIP). USB Implementers Forum. 7 March 2012. Archived from the original on 6 October 2014 . Retrieved 13 May 2021. Upstream USB connectors supply power at a nominal 5 V DC via the V_BUS pin to downstream USB devices. Kars, Vincent (July 2012). "USB versus USB". The Well-Tempered Computer. Archived from the original on 22 April 2018 . Retrieved 7 May 2018. Synchronous is not used in a quality DAC as it is very jittery. ... asynchronous is the better of these modes. USB 3.0 Technology" (PDF). HP. 2012. Archived from the original on 19 February 2015 . Retrieved 2 January 2014. USB connectors have been increasingly replacing other types as charging cables of portable devices.Garney, John (June 1996). "An Analysis of Throughput Characteristics of Universal Serial Bus" (PDF).

Metz, Cade (25 February 2003). "The Great Interface-Off: FireWire Vs. USB2.0". PC Magazine. Archived from the original on 30 September 2007 . Retrieved 25 August 2007.Debugging USB 2.0 for Compliance: It's Not Just a Digital World" (PDF). Keysight Technologies. Technologies Application Note. Keysight (1382–3). The functionality of a USB device is defined by a class code sent to a USB host. This allows the host to load software modules for the device and to support new devices from different manufacturers. bit Atmel Microcontroller Application Note" (PDF). Atmel Corporation. 2011. Archived (PDF) from the original on 6 May 2016 . Retrieved 13 April 2016.

a b c d Axelson, Jan (2015). USB Complete: The Developer's Guide, Fifth Edition, Lakeview Research LLC, ISBN 1931448280, pp. 1-7. Neither USB 1.0 nor 1.1 specified a design for any connector smaller than the standard type A or type B. Though many designs for a miniaturized type B connector appeared on many peripherals, conformity to the USB1. x standard was hampered by treating peripherals that had miniature connectors as though they had a tethered connection (that is: no plug or receptacle at the peripheral end). There was no known miniature type A connector until USB2.0 (revision 1.01) introduced one.

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Thunderbolt 3 and Thunderbolt 4 use USB-C. [117] [118] [119] Thunderbolt3 has two physical 20Gbit/s bi-directional channels, aggregated to appear as a single logical 40Gbit/s bi-directional channel. Thunderbolt 3 controllers can incorporate a USB3.1 Gen2 controller to provide compatibility with USB devices. They are also capable of providing DisplayPort Alternate Mode as well as DisplayPort over USB4 Fabric, making the function of a Thunderbolt3 port a superset of that of a USB3.1 Gen2 port. High Speed USB Maximum Theoretical Throughput". Microchip Technology Incorporated. 23 March 2021. Archived from the original on 26 March 2021 . Retrieved 23 March 2021. USB 2.0 Specification Engineering Change Notice (ECN) #1: Mini-B connector" (PDF). 20 October 2000. Archived (PDF) from the original on 12 April 2015 . Retrieved 29 December 2014– via www.usb.org. USB4 Version 2.0 from Simulation to Tx, Rx, and Interconnect Test | Signal Integrity Journal". www.signalintegrityjournal.com . Retrieved 22 July 2023. Axelson, Jan. "USB 3.0 Developers FAQ". Archived from the original on 20 December 2016 . Retrieved 20 October 2016.