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About
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
[url=http://www.china-topscable.com/usb-cable/]USB Cable[/url]
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 [url=http://www.china-
topscable.com/usb-cable/usb-2-0-cable/]USB 2.0 cable[/url]
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
[url=http://www.china-topscable.com/usb-cable/usb-3-0-cable/]USB
3.0 cable[/url], 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 [url=http://www.china-
topscable.com/usb-cable/usb-2-0-cable/90-degree-usb-cable.html]90
Degree USB Cable[/url], 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 [url=http://www.china-topscable.com/usb-
cable/usb-2-0-cable/usb-otg-cable.html]USB OTG Cable[/url].
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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