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What is USB ?

What is USB  ?


USB is the abbreviation of Universal Serial Bus in English. It is an external bus standard used to regulate the connection and communication between computers and external devices. It is an interface technology applied in the PC field.


Universal Serial Bus, USB is an emerging data communication method that gradually replaces other interface standards. It was jointly formulated by computer companies and communication companies such as Intel, Compaq, Digital, IBM, Microsoft, NEC and Northern Telecom in 1995, and gradually Formed an industry standard


USB is a serial bus standard and a technical specification for input and output interfaces. It is widely used in information communication products such as personal computers and mobile devices, and is extended to photographic equipment, digital TV (set-top boxes), game consoles and other related products field


The latest generation is USB4, the transmission speed is 40Gbit/s, the three-stage voltage is 5V/12V/20V, the maximum power supply is 100W, and the new Type C interface allows positive and negative blind insertion.


Development path 


USB 1.0


USB 1.0 appeared in 1996, with a speed of only 1.5Mb/s (bits per second); it was upgraded to USB 1.1 in 1998, and the speed was greatly increased to 12Mb/s, which can be seen on some old devices interface.


USB1.1 is a relatively common USB specification, with a transfer rate of 12 Mbps in high-speed mode and 1.5 Mbps in low-speed mode.

USB 2.0


The USB2.0 specification is evolved from the USB1.1 specification.

Its transfer rate reaches 480Mbps, which is 60MB/s converted to MB, which is enough to meet the rate requirements of most peripherals.

The "Enhanced Host Controller Interface" (EHCI) in USB 2.0 defines an architecture that is compatible with USB 1.1.

It can drive USB 1.1 devices with USB 2.0 drivers. That is to say, all devices that support USB 1.1 can be used directly on the USB 2.0 interface without worrying about compatibility issues, and accessories such as USB cables, plugs, etc. can also be used directly.


USB 3.0


The USB 3.0 Promoter Group, composed of industry giants such as Intel, Microsoft, Hewlett-Packard, Texas Instruments, NEC, ST-NXP, etc., announced that the new-generation USB 3.0 standard formulated by the organization has been officially completed and publicly released.

The theoretical speed of USB 3.0 is 5.0Gb/s, but in fact it can only reach 50% of the theoretical value, which is also close to 10 times that of USB 2.0.
USB 3.0 will be referred to as "USB SuperSpeed" in actual device applications, conforming to the previous USB 1.1 FullSpeed ​​and USB 2.0 HighSpeed


USB 3.1


USB 3.1 Gen2 is the latest USB specification, which was initiated by companies such as Intel. The data transfer speed can be increased to a speed of 10Gbps.
USB 3.1 Gen2 is compatible with existing USB 3.0 (ie USB 3.1 Gen1) software stacks and device protocols, 5Gbps hubs and devices, and USB 2.0 products.

The latest USB naming convention of USB-IF, the original USB 3.0 and USB 3.1 will no longer be named, and all USB standards will be called USB 3.2. Considering compatibility, USB 3.0 to USB 3.2 are respectively called USB 3.2 Gen 1. USB 3.2 Gen 2, USB 3.2 Gen 2x2.


USB 4.0


The USB 4.0 specification was published on August 29, 2019 by the USB Implementers Forum. USB4 is based on the Thunderbolt 3 protocol. It supports 40 Gbit/s throughput, is Thunderbolt 3 compatible, and is backward compatible with USB 3.2 and USB 2.0.


Type of interface

USB A Type

USB Mini B 5 Pin Type


USB Mini B 4 Pin Type


USB Mini  8 Pin Type


Micro USB Type


USB 3.1 Type-C


Premier Cable D type socket USB female to female connector panel mounting


Premier Cable D-Shape USB Female Socket Chassis Panel Mount Connector

Premier Cable USB Feed through chassis D series panel mount adapter 


Premier Cable USB Type A Feedthru Panel Mount D Type Connector


Premier Cable USB Socket D-Type Module Panel Mount Bulkhead 


Premier Cable D-size Feed Through chassis USB2.0 A-A adapter 


USB Panel Mount Female to Female Coupler provide a more stable transmission environment for data in the electronic information environment

USB Connector Gold Plated Contact Pins ,  Easy to install front panel mount  , D shape XLR Housing panel connector 


Type : USB adaptor


Model : D-type USB 


Format :  USB D-shape housing


Gender : USB A Female to A Female


Style : Panel Chassis Mount ,  Flange Panel Mount



USB3.0 female to female connects two USB cables, which are widely used for digital TV and computer data transmission with USB interface.


USB D-size feed through chassis USB A-A adapter through rigorous testing to ensure high grade materials and quality that provide secure connections.


Can Be Installed : Standard D-type international installation port, can be installed in a fixed position, suitable for 86 panels, ground plugs, wall plugs, desk plugs.


D type socket USB female to female connector panel mountingD-Shape USB Female Socket Chassis Panel Mount ConnectorUSB Feed through chassis D series panel mount adapter


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