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    What is a USB Cable?

    We know that technology evolves faster and further every day and it can sometimes 
 
feel overwhelming. That’s why we’ve partnered with StarTech.com, a global leader in 
 
manufacturing top-quality USB cables and connectivity solutions, to bring you this <a 
 
href="http://www.china-topscable.com/usb-cable/" target="_self">USB Cable Guide.

   

    Here, you’ll learn everything you need to know about the various types of USB 
 
cables, what the USB versions mean for transferring your data, and how they work.

   

    USB stands for Universal Serial Bus and is an umbrella term used to describe the 
 
most common port type: the rectangular USB, known as USB A. Typically, USB ports are 
 
found across multiple devices, such as phones, PCs, and gaming consoles.

   

    Initially developed in the mid-90s, the USB connection was created to standardize 
 
ports for peripherals. This is so secondary devices, like printers and keyboards, can 
 
connect to a wider range of computers and hosts, rather than a select few with 
 
specific receptacles.

   

    Today, there are a variety of USB types, but the main use of all USBs has remained 
 
the same: to transfer data and power. Over time, new versions have been released to 
 
improve transfer speeds and power output.

   

    StarTech.com are the experts when it comes to how this technology works. The 
 
industry leaders explain a <a href="http://www.china-topscable.com/usb-cable/usb-2-0-
 
cable/" target="_self">USB 2.0 cable connection like this:

   

    “If you were to open up a USB cable, you would notice 4 different USB wire 
 
colours: white and green, which carry data, and red and black, which are used for 
 
power. Red carries 5 volts and acts as the positive wire, while black is the negative 
 
wire, otherwise known as the ground wire.

   

    Each type of USB connection (USB cable type A, B, C, micro and mini) has a pinout 
 
system, these are the small metal strips inside the connector, designed to access each 
 
of these wires and their capabilities.”

   

    Over the last 25 years, there have been several different USB cables and 
 
iterations, depending on the USB protocol. The USB started with version 1.0, which 
 
transfers up to 12Mbps and was released in 1995. The latest today is USB version 4, 
 
which transfers up to a massive 40Gbps.

   

    StarTech.com know that users want the best USB for the job, which is why they have 
 
created a table below to help decipher the speed and capabilities of each version.

   

    As with USB versions, the shape of the USB connection has also seen drastic 
 
changes over the years. With each new evolution of USB type, their form factor 
 
generally becomes smaller to accommodate for new, much thinner devices that are 
 
popular during the time of release.

   

    The USB C design, which is the latest USB release, is unique because it’s the 
 
only USB that fits into another port type not specifically created for it: Thunderbolt 
 
3. They are both the same shape and users can employ Thunderbolt 3 and USB C cables 
 
and ports interchangeably. All other male and female USB connector types only fit 
 
their corresponding male and female ports. For example, a USB port type b will only 
 
accept a USB type B connector.

   

    The version or speed of the technology is dictated by the host device, connecting 
 
peripheral, and the version of the <a href="http://www.china-topscable.com/usb-
 
cable/usb-3-0-cable/" target="_self">USB 3.0 cable, not the shape of the port.

   

    Backwards compatibility means that the latest version of something is still 
 
capable of using previous versions. For example, a USB A 3.0 port is capable of 
 
recognising and utilising a USB A 2.0 peripheral.

   

    For the newer USB C, it’s still possible to connect older USB supported devices 
 
to a USB C port or host, via an adapter. StarTech.com provide an extensive range of <a 
 
href="http://www.china-topscable.com/usb-cable/usb-2-0-cable/90-degree-usb-cable.html" 
 
target="_self">90 Degree USB Cable, which can be used if the host and peripheral 
 
have different port types. Adapters, or connectors, can be found for all USB types and 
 
are not limited to USB C.

   

    When using previous USB versions, the performance is limited to the earliest 
 
version that’s being used. For example, if you want to transfer files from a 2.0 USB 
 
A enabled hard drive to a laptop with USB A 3.0 ports, the transfer rate (USB speeds) 
 
would be limited to 480Mbps.

   

    USB-C is the latest advancement in USB connectivity and has been dubbed by many as 
 
“future proof.” It is conveniently reversible and has a much more compact shape 
 
compared to previous USB cable types. A USB C cable not only deals with data and 
 
power, but also video. It supports multiple protocols and carries DisplayPort and HDMI 
 
signals (when in Alt mode), as well as Thunderbolt 3 for equipped devices. Also, like 
 
other USBs, it’s capable of backwards compatibility from USB 1.1, but functions with 
 
the latest USB 3.2 Gen 2.2 devices as well.

   

    This type of connector looks and is physically the same as a Thunderbolt 3 port. 
 
Thunderbolt 3 and USB C ports and cables can be used interchangeably and utilised for 
 
data transfer, power output, and video. When using a Thunderbolt 3 port with a USB C 
 
cable, users can charge full-size electronics with up to 100W of power output. Even 
 
better, the top data transfer speed is 40Gbps with a Thunderbolt 3 port, meaning you 
 
can be more productive.

   

    Universal Serial Bus (USB) was developed in the 1990s in an effort to simplify the 
 
connections between computers and peripheral devices. It has become widely popular due 
 
to its compatibility with many platforms and operating systems, its low cost of 
 
implementation, and its ease of use. Most computers that are built today come with 
 
several USB ports, and USB is the interface of choice for most home and office 
 
peripherals including printers, cameras, modems, and portable storage devices.

   

    USB standards are developed and maintained by an industry body called the USB 
 
Implementers Forum (USB-IF). In its original specification, USB defined only two 
 
connector types: A and B. Revisions to the specification and demands on manufacturers 
 
have expanded the breadth of connectors used for USB devices, but the majority of USB 
 
products still use these A and B connector interfaces.

   

    Found on host controllers in computers and hubs, the A-style connector is a flat, 
 
rectangular interface. This interface holds the connection in place by friction which 
 
makes it very easy for users to connect and disconnect. Instead of round pins, the 
 
connector uses flat contacts which can withstand continuous attachment and removal 
 
very well. The A-socket connector provides a "downstream" connection that is 
 
intended for use solely on host controllers and hubs. It was not intended for use as 
 
an "upstream" connector on a peripheral device. This is critical because a 
 
host controller or hub is designed to provide 5V DC power on one of the USB pins. 
 
Though not that common, A-A cables are used to connect USB devices with an A-style 
 
Female port to a PC or another USB device, and for data transfer between two computer 
 
systems. Note: Typically an A-A cable is not intended to connect two computers 
 
together or to connect a USB hub between two computers. Doing so may cause irreparable 
 
damage to your computers and may even present a fire hazard. Check with the 
 
manufacturer before using an A-A cable for data transfer.

   

    The B-style connector is designed for use on USB peripheral devices. The B-style 
 
interface is squarish in shape, and has slightly beveled corners on the top ends of 
 
the connector. Like the A connector, it uses the friction of the connector body to 
 
stay in place. The B-socket is an "upstream" connector that is only used on 
 
peripheral devices. Because of this, the majority of USB applications require <a 
 
href="http://www.china-topscable.com/usb-cable/usb-2-0-cable/usb-otg-cable.html" 
 
target="_self">USB OTG Cable.

   

    The USB-C or USB Type-C connector is the newest USB connector on the market. The 
 
USB-C connector has a reversible/symmetrical design and can be plugged into any USB-C 
 
device using either end. A USB-C cable is capable of carrying USB 3.1, USB 3.0, USB 
 
2.0, and USB 1.1 signals. The USB-C is commonly paired with the USB-A, USB-B, USB 
 
Micro-B, and other USB connectors when supporting previous versions of the USB 
 
specification. USB-C can be adapted to work with each of these legacy connectors. When 
 
connecting two USB 3.1 devices, the USB-C cable will support data transfer rates that 
 
are twice the speed of existing USB technology (up to 10Gbit/s), enhanced power 
 
delivery of up to 20 volts, 5 amps, and 100 watts for power and charging, and built-in 
 
support for DisplayPort video and four channel audio (speaker and microphone).

   

    One drawback to the B-style connector is its size, which measures almost a half 
 
inch on each side. This made the B-style interface unsuitable for many compact 
 
personal electronic devices such as PDAs, digital cameras, and cellphones. As a 
 
result, many device manufacturers began the miniaturization of USB connectors with 
 
this Mini-b. This 5-pin Mini-b is the most popular style of Mini-b connector, and the 
 
only one recognized by the USB-IF. By default, a Mini-b cable is presumed to have 5 
 
pins. This connector is quite small, about two-thirds the width of an A-style 
 
connector. It is also specified for use in the newer standard called USB On-The-Go 
 
which allows peripheral devices to communicate with the presence of a host controller.

    Known as "SuperSpeed", this A-style connector is commonly found on host 
 
controllers in computers and hubs, the A-style connector is a flat, rectangular 
 
interface. This interface holds the connection in place by friction which makes it 
 
very easy for users to connect and disconnect. Instead of round pins, the connector 
 
uses flat contacts which can withstand continuous attachment and removal very well. 
 
The A-socket connector provides a "downstream" connection that is intended 
 
for use solely on host controllers and hubs. This connector is similar in size and 
 
shape to the A-Type connector used in USB 2.0 & USB 1.1 applications. However, the 
 
USB 3.0 A-type has additional pins that are not found in the USB 2.0 & USB 1.1 A-
 
Type. The USB 3.0 connector is designed for USB SuperSpeed applications; however, it 
 
will carry data from slower speed connections, and it is backwards compatible with USB 
 
2.0 ports. USB 3.0 A connectors are often blue in color to help identify them from 
 
previous versions.

   

    Just about any computer that you buy today comes with one or more Universal Serial 
 
Bus connectors. These USB connectors let you attach mice, printers and other 
 
accessories to your computer quickly and easily. The operating system supports USB as 
 
well, so the installation of the device drivers is quick and easy, too. Compared to 
 
other ways of connecting devices to your computer (including parallel ports, serial 
 
ports and special cards that you install inside the computer's case), USB devices 
 
are incredibly simple.

   

    ­In this article, we'll look at USB ports from both a user and a technical 
 
standpoint. You'll learn why the USB system is so flexible and how it's able 
 
to support so many devices so easily -- it's truly an amazing system.

   

    Most computers that you buy today come with at least one or two USB sockets. But 
 
with so many USB devices on the market, you easily run out of sockets very quickly. 
 
For example, you could have a keyboard, mouse, printer, microphone and webcam all 
 
running on USB technology, so the obvious question is, "How do you hook up all 
 
the devices?"

   

    The easy solution to the problem is to buy an inexpensive USB hub. The USB 
 
standard supports up to 127 devices, and USB hubs are a part of the standard.

   

    A hub typically has four new ports, but may have many more. You plug the hub into 
 
your computer, and then plug your devices (or other hubs) into the hub. By chaining 
 
hubs together, you can build up dozens of available USB ports on a single computer.

   

    Hubs can be powered or unpowered. As you'll see on the next page, the USB 
 
standard allows for devices to draw their power from their USB connection. A high-
 
power device like a printer or scanner will have its own power supply, but low-power 
 
devices like mice and digital cameras get their power from the bus in order to 
 
simplify them. The power (up to 500 milliamps at 5 volts for USB 2.0 and 900 milliamps 
 
for USB 3.0) comes from the computer. If you have lots of self-powered devices (like 
 
printers and scanners), then your hub doesn't need to be powered -- none of the 
 
devices connecting to the hub needs additional power, so the computer can handle it. 
 
If you have lots of unpowered devices like mice and cameras, you probably need a 
 
powered hub. The hub has its own transformer and it supplies power to the bus so that 
 
the devices don't overload the computer's supply.

   

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Topics and categories on  The BidAmount Asian Art Forum | Chinese Art

Kangxi vases, Kangxi dishes and chargers, Kangxi ritual pieces, Kangxi scholar's objects, Qianlong famille rose, Qianlong enamels, Qianlong period paintings, Qianlong Emporer's court, Fine porcelain of the Yongzheng period. Chinese imperial art, Ming porcelain including Jiajing, Wanli, Xuande, Chenghua as well as Ming jades and bronzes. 

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A free Asian art discussion board and Asian art message board for dealers and collectors of art and antiques from China, Japan, Korea, Thailand, Cambodia, Vietnam and the rest of Asia. Linked to all of the BidAmount Asian art reference areas, with videos from plcombs Asian Art and Bidamount on YouTube.  Sign up also for the weekly BidAmount newsletter and catalogs of active eBay listing of Chinese porcelain, bronze, jades, robes, and paintings. 

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