Topic: What is USB 3.0: Must you need to know
What is USB 3.0: Must you need to know
What is USB3.0? USB 3.0 is a USB standard that appeared in November 2008. Today, many modern computers and devices support this standard. USB 3 is a super-speed USB standard and is preferred by many users due to its efficient performance and speed. Devices that ship with this USB standard can probably transfer data at a maximum speed of 5 Gbps (5120 Mbps), but the 3200 Mbps spec feels more reasonable in everyday USB 3.0 cable use.
This is in stark contrast to earlier USB standards like USB 2.0, which has a maximum data transmission speed of 480 Mbps, and USB 1.1, which has a maximum speed of 12 Mbps.
Although USB4 is the latest specification, USB 3.2 is an improved version of the USB 3.1 (SuperSpeed+) cable. This theoretical maximum speed increases with USB 3.2 to 20 Gbps (20480 Mbps) compared to USB 3.1’s maximum speed of 10 Gbps (10240 Mbps). It should be noted that while older USB devices, cables, and adapters may be physically compatible with USB 3.0 hardware, all of your devices must support it if you want the fastest data transmission speed possible.
For your information, the “old” names for these standards are USB 3.0, USB 3.1, and USB 3.2. Their correct designations are USB 3.2 Gen 1, USB 3.2 Gen 2, and USB 3.2 Gen 2×2.
Connectors for USB 3
What Is USB 3?
Plug refers to the male connector on a USB 3 cable or flash drive. Receptacle refers to the female connector on a computer port, extension cable, or other USB 3.0-speed device.
- USB Type-A: These are the basic rectangular USB connectors, also known as USB 3 Standard-A, similar to the plug on the end of a flash drive. There is physical compatibility between USB 3.0 Type-A plugs and receptacles and those of USB 2.0 and USB 1.1.
- USB Type-B: These connectors, which are square with a sizable notch at the top and are technically known as USB 3.0 Standard-B and USB 3 Powered-B, are typically seen on printers and other large devices. While plugs from earlier USB standards are compatible with USB 3 Type-B receptacles, USB 3.0 Type-B plugs are incompatible with plugs from earlier USB standards.
- USB Micro-A: Many smartphones and other portable electronic devices include rectangular “two-part” plugs for the USB 3.0 Micro-A connector. While older USB 2.0 Micro-A plugs will work in USB 3.0 Micro-AB receptacles, USB 3.0 Micro-A plugs are only compatible with USB 3.0 Micro-AB receptacles.
- USB Micro-B: Devices using USB 3.0 Micro-B connectors look similar to those using Micro-A connectors. Only USB 3.0 Micro-B and USB 3 Micro-AB receptacles are compatible with USB 3.0 Micro-B plugs. There is physical compatibility between USB 3.0 Micro-B and USB 3 Micro-AB receptacles and earlier USB 2.0 Micro-B connectors.
Although USB 3 does not support these connectors, the USB 2.0 specification includes USB Mini-A, USB Mini-B, and USB Mini-AB plugs and receptacles. These connectors should be USB 2.0 connectors if you find them with a USB 3.0 port.
Not sure if a device, cable, or port is USB 3? The plastic covering the plug or receptacle is blue, which is a good sign of USB c to USB 3.0 adapter compliance. Although not required, the USB 3 specification recommends using blue USB adapter cables to distinguish them from USB 2.0 cables. You can browse a USB physical compatibility chart for a one-page guide to what works with what works from USB c to USB 3.0.
More details about USB 3.0
Windows 8 was the first operating system from Microsoft with built-in support for this USB standard. With version 2.6.31, the Linux kernel is supported since 2009. See Is USB 3 compatible with my computer? When using a Mac.
Buffalo Technology, a Japanese manufacturer of computer accessories, was the first to provide USB 3 products to consumers in 2009 from USB 3.0 to USB c.
The USB 3 specification does not specify a maximum cable length, although 10 feet is the maximum length that is typically used. If your USB 3.0 hub devices no longer work properly due to faulty USB 3 drivers, Windows allows you to install new ones.
Features and Advantages of USB 3 over USB 2
- Transfer speeds: USB 3 allows transfer speeds of 4.8 Gbps, which is ten times faster than USB 2.0’s 480 Mbps.
- Adding a second physical bus doubles the number of cables from four to eight. New types of connectors were developed because more cables required more space in the cables and connectors.
- Power Consumption: USB 3.0 offers up to 900mA, compared to 500mA for USB 2.0. When higher power is required, USB 3 devices deliver it while conserving power when the device is plugged in but not in use.
- Higher Bandwidth: Unlike USB 2.0, which can only handle one direction of data at a time, USB 3 has two unidirectional data paths, one for receiving data and the other for transmitting USB 3.0 pluggable.
- Better bus utilization: A new feature has been implemented to allow a device to asynchronously notify the host of its availability (using NRDY and ERDY packets).
When data is sent through USB 3 devices, cables, and connectors. A request from the host is followed by a response from the USB 3.0 vs 3.1 devices to start the transaction. The device approves or denies the request. The device sends or accepts data from the host if it accepts it. It responds with a Not Ready (NRDY) signal to inform the host. That powered USB 3.0 hub can’t complete the request if there isn’t enough buffer space or data. The host will reprogram the transaction once the device sends a USB 3.0 vs 2.0 Endpoint Ready (ERDY) signal.
The internal color of USB 3 connectors is usually blue to identify them from USB 2.0 connectors. Which differ from each other USB c.
Micro USB 3.0, USB 3.0 Type B, 3. Connector 3.0 Type Micro B, minimum USB Type A
Compatible with USB 2.0 is USB 3. However, the advantages of speed and power will not be fully realized with the USB c charger. Because the USB 3 product will perform at the same level as a USB 2.0 product.
If they physically match, USB 3.0 receptacles and USB Standard 2.0 device plugs are electrically compatible. USB 3.0 Type B receptacles will support USB 2.0 and earlier plugs. While USB 3 Type A plugs and receptacles are fully backward compatible. However, USB 2.0 and earlier receptacles will not accept USB 3.0 Type B plugs.
As a result, USB 3.0 cables cannot be used with USB 2.0 or USB 1.1 peripherals, while USB 2.0 cables can operate at USB 2.0 speeds with USB 3.0 devices.