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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. The Micro plug design is rated for at least 10,000 connect-disconnect cycles, which is more than the Mini plug design. [13] [16] The Micro connector is also designed to reduce the mechanical wear on the device; instead, the easier-to-replace cable is designed to bear the mechanical wear of connection and disconnection. The Universal Serial Bus Micro-USB Cables and Connectors Specification details the mechanical characteristics of Micro-A plugs, Micro-AB receptacles (which accept both Micro-A and Micro-B plugs), Double-Sided Micro USB, and Micro-B plugs and receptacles, [16] along with a Standard-A receptacle to a Micro-A plug adapter. USB currently has four major versions and three types. The version increments, from USB 1.0 through USB4, primarily mark speed increases. For example, the original USB 1.0 had a data rate of 1.5 megabits per second at a slow rate, increasing to 12 megabits per second at full speed. The data rate has improved significantly over the years, with USB 3.2 offering 20 gigabits per second. The most recent USB4 specification, released in 2019, will provide an impressive 40 gigabits per second when fully implemented through USB-C cables. chargers". EU: EC. 29 June 2009. Archived from the original on 23 October 2009 . Retrieved 22 June 2010. USB Power Delivery — Introduction" (PDF). July 16, 2012. Archived (PDF) from the original on January 23, 2013 . Retrieved January 6, 2013.
Common Charging and Local Data Connectivity". Open Mobile Terminal Platform. February 11, 2009. Archived from the original on March 29, 2009 . Retrieved February 11, 2009. 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] USB Power Delivery" (PDF). usb.org. USB-IF. October 20, 2016. Archived from the original (PDF) on December 20, 2016. Ensure your office environment has sufficient opportunities for charging USB devices by considering the number and types of ports in the charging station. Our recommended USB charging hub: USB Cable Length Limitations" (PDF). cablesplususa.com. November 3, 2010. Archived from the original (PDF) on October 11, 2014 . Retrieved February 2, 2014.
By design, it is difficult to insert a USB plug into its receptacle incorrectly. The USB specification requires that the cable plug and receptacle be marked so the user can recognize the proper orientation. [1] The USB-C plug however is reversible. 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. a b c "USB Power Delivery Specifications 2.0 and 3.1" (PDF (Zipped)). USB.org. October 26, 2021. Archived (PDF (Zipped)) from the original on November 3, 2021 . Retrieved November 3, 2021. With these cables, the type is whichever end of the cable isn’t the standard USB Type-A connector. So, for example, a cable with both a USB Type-A and a Type-C connector is a USB Type-C cable. a b c "10 Power Rules", Universal Serial Bus Power Delivery Specification revision3.1, version1.0, USB Implementers Forum , retrieved September 5, 2017
Smith, Ryan (September 22, 2014). "DisplayPort Alternate Mode for USB Type-C Announced - Video, Power, & Data All Over Type-C". AnandTech. Archived from the original on December 18, 2014 . Retrieved December 28, 2014. No. Many devices use different USB connectors based on connector size and reversibility instead of speed. Why isn’t USB Type-B as common as other types?Cai Yan (31 May 2007). "China to enforce universal cell phone charger". EE Times. Archived from the original on 29 September 2007 . Retrieved 25 August 2007. The different A and B plugs prevent accidentally connecting two power sources. However, some of this directed topology is lost with the advent of multi-purpose USB connections (such as USB On-The-Go in smartphones, and USB-powered Wi-Fi routers), which require A-to-A, B-to-B, and sometimes Y/splitter cables. See the USB On-The-Go connectors section below for a more detailed summary description. Connectors [ edit ] Comparison of legacy USB connector plugs, omitting the current standard Type-C plugs
USB PD continues the use of the bilateral 5% tolerance, with allowable voltages of PDO ±5% ±0.5V (eg. for a PDO of 9.0V, the maximum and minimum limits are 9.95V and 8.05V, respectively). [42] a b Kumar, Ajay; Winkelman, Steven; LeClair, Dave (July 27, 2022). "What Is Fast Charging?". PCMag . Retrieved May 21, 2023.a b "Deprecation of the Mini-A and Mini-AB Connectors" (PDF) (Press release). USB Implementers Forum. 27 May 2007. Archived from the original (PDF) on 6 March 2009 . Retrieved 13 January 2009. ACAs have three ports: the OTG port for the portable device, which is required to have a Micro-A plug on a captive cable; the accessory port, which is required to have a Micro-AB or type-A receptacle; and the charging port, which is required to have a Micro-B receptacle, or type-A plug or charger on a captive cable. The ID pin of the OTG port is not connected within plug as usual, but to the ACA itself, where signals outside the OTG floating and ground states are used for ACA detection and state signaling. The charging port does not pass data, but does use the D± signals for charging port detection. The accessory port acts as any other port. When appropriately signaled by the ACA, the portable device can charge from the bus power as if there were a charging port present; any OTG signals over bus power are instead passed to the portable device via the ID signal. Bus power is also provided to the accessory port from the charging port transparently. [50] USB Power Delivery [ edit ] The USB Type-C Charging logo ( USB4 20Gbps port) USB PD Rev. 1.0 source profiles [55] Profile
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] 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. Often referred to as “male”, as they plug into a “female” port, it is important to understand that there are two elements of USB standard to consider; the physical connector shape and the underlying protocol (speed). USB Type A 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 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.USB-C also does away with the variety of previous sizes found for both USB-A and USB-C. It is only slightly larger than the previous micro-B connector, meaning that it is suitable for various devices, from small mobiles and tablets to larger visual displays. This simplicity means USB-C cables are highly interchangeable, so users can store fewer cables. Of course, laptop and desktop ports can also be simplified. Programming and Debugging: USB cables are essential for programming and debugging certain electronic devices. Part 2 - Electrical". MQP Electronics. Archived from the original on December 24, 2014 . Retrieved December 29, 2014. USB Type-B connectors, officially called Standard-B connectors, are square in shape,with chamfered outer corners at the upper ends, depending on the USB version.
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