How USB Speeds evolve

Have you ever wanted to know how USB speeds evolve? This is the second post written consecutively regarding USB drives within a short period of time (read the previous post Should you pull out your USB or eject?).

The previous post was viewed and highlighted by many readers. Have you ever wanted to know how USB speeds evolve? I decided to write again, this time to answer this mostly asked query. I hope this will help everyone to understand and benefit in their day to day life in the home, school or at work.

What is Universal Serial Bus (USB) ?

Universal Serial Bus (USB) is the communication protocol used between computers and electronic devices to communicate with each other. The initial usage of USB did not support high-speed data transmission but was intended to use with slower devices like mouse, keyboard, game consoles, etc.

The evolution of USB devices can be noticed in parallel to its demand by various devices evolved in the market. Nowadays devices like tablets, smart-phones, game consoles, camera, scanner, etc and many more devices are connected through USB, allowing communication and recharging more convenient and faster.

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The evolution of USB technology with time and speed

To understand about how USB speeds evolve let’s have a look into the below table.

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Evolution in detail – facts and figures

USB 1.0

  • Speed – 1.5 Mbps (Megabits per second) as a low-speed device and 12 Mbps (Megabits per second) as a full-speed device.

USB 2.0

  • High Speed (HS) – 480 Mbps (Megabits per second)
  • Half duplex – can either send or receive data
  • Power usage -Up to 500 mA

USB 3.0

  • Super Speed (SS) – 4.8 Gbps (Gigabits per second)
  • Full duplex – can send/ receive data asynchronously
  • Power usage -Up to 900 mA, more power efficient (less power in idle state)
  • Can power more devices
  • Backward compatible – can be used with USB 2.0 devices at the speed of USB 2.0.

USB 3.1

  • Super Speed (SS) – 10 Gbps (Gigabits per second)
  • Can power any type of device
  • The c-type connector that plugs in without regard to orientation.
  • Improved bus utilization using NRDY & ERDY packets to let a device asynchronously notify the host, of its readiness to function.

USB Connector Standards

[table id=2 /]

Hope this post helped you to learn how USB speeds evolve. Now you gaine an idea about the USB, the speeds and technology you need to choose before you buy your next USB.

If you have any comments, post below and share your ideas.

You can also join the forum to raise your queries and to start a discussion with others.

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