The Difference Between USB 2.0 and USB 3.0

The difference between USB2.0 and USB3.0
USB3.0 is developed and promoted by USB3.0 composed of industry giants such as Intel, Microsoft, HP, Texas Instruments, NEC, and ST-NXP. On November 18, 2008, it was announced that the USB3.0 standard had been officially completed and publicly released. The USB3.0 standard provides ten times the transmission speed and higher energy efficiency of USB 2.0, and can be widely used in PC peripherals and consumer electronics. The theoretical bandwidth of the USB3.0 interface has been increased to 5Gbps, while the theoretical bandwidth of USB2.0 is 480Mbps. All high-speed USB2.0 devices will perform better using USB3.0 data cables.

SuperSpeed USB 3.0 Cable A to B – USB 3 A (m) to USB 3 B (m)	USB A to Mini Type B data cable	USB Type C data cable
USB 3.0 data cable USB 3.0 A male to USB 3.0 B male printer cable Part number: 61035-01 Overview: YAXUN Electronics can customize various types of USB 3.0 data cables, charging cables, and printer cables for customers. The lengths are 1 meter, 2 meters, 3 meters, 5 meters, or can be customized according to customer requirements. Braiding and shielding can also be customized according to customer requirements.	USB A to Mini Type B data cable Wholesale USB 2.0 to Mini 5 PIN data cable, length 1m, 1.5m, 3m, 5m. Part number: 610032-01Overview: YAXUN Electronics can customize and wholesale USB A male to Mini 5 PIN B male data and charging cables for customers. This kind of interface is winning the favor of many manufacturers due to its excellent anti-mis-insertion performance and relatively small size. This interface is widely used in card readers, MP3 players, digital cameras and mobile hard drives.	USB Type C data cable USB-C and USB 3.1 often appear together, but in fact USB-C is not the same as USB 3.1. USB 3.1 is an industry standard initiated by large companies such as Intel. The biggest feature of USB 3.1 is that data transmission is extremely fast, and the theoretical speed can reach 10Gbps. USB Type-C is a connector specification, consisting of a Type-C plug and a Type-C socket.In the latest USB 3.1 standard, there are three interface styles, one is Type-A (Standard-A, the most common USB interface style on traditional computers). One is Type-B (Micro-B, the interface style currently used by mainstream Android smartphones). The other one is Type-C (the newly designed interface style mentioned above). Then we should be able to understand it easily. Although USB Type-C is designed based on USB 3.1, this does not mean that devices using this connection method must support USB.

Main difference:
1. The data bandwidth of USB3.0 is ten times that of USB2.0 and can reach 5Gb/s (480MB/s). The synchronous transmission bandwidth can also reach 384MB/s, which is one of the main differences between USB3.0 and 2.0;
2. USB3.0 low power consumption (approximately 25% lower power consumption than USB2.0 when the data transfer volume is 20MB/s);
3. USB3.0 is more energy efficient than 2.0. For devices that are temporarily in a waiting state, you can use power saving mode;
4. USB3.0 can provide greater power through the cable (2.5W increased to 4.5W).
5. USB3.0 is backward compatible and supports USB2.0 devices, but USB2.0 cannot support USB3.0.

development trend
The increasing power of USB cables means people can use them to charge their laptops.
Intel and its allies are developing USB Power Delivery (USB PD) technology. USB 2.0 can transmit 2.5 watts of power, USB 3.0 can transmit 4.5 watts, and the USB BC cable can transmit 7.5 watts of power. USB PD can support 10-watt mobile phone devices, 18-watt tablet devices and most peripherals, 36-watt client devices, larger peripherals, 60-watt laptops, and 100-watt workstations.
The emergence of USB PD has simplified the charging process of devices such as mobile phones and tablets. Intel engineers Saunders and Dunstan said: “By supporting tablets, laptops and other devices, it makes the charging range wider.”

According to the interface
USB female, USB male, USB printing cable, MINI USB, micro USB
1. Type A USB plug (plug) and Type A USB socket (receptacle)
Pin order (Plug on the left, Receptacle on the right):

Package size (single PIN Receptacle):
2. Type B USB plug (plug) and Type B USB socket (receptacle)
Pin sequence (Plug on the left, Receptacle on the right, note that the arrow points to the diagonal port upwards, and the USB port faces you):
The pin definition and package size are the same as the USB type A pin description.
Package size (single PIN Receptacle):
3. Mini B type USB plug (plug) and Mini B type USB socket (receptacle)
Pin order (Plug on the left, Receptacle on the right, note that the wide edge is on top, and the USB port faces you):

Pin definition:

Package size:
The above part is the USB 2.0 specification content. The Micro USB below is actually a supplementary specification released in 2006. Since this interface definition cannot support the USB 3.0 protocol backwards, it still belongs to the USB 2.0 protocol package.
4. Micro USB plug and socket
Micro USB supplementally defines the Micro USB interface used in cellular phones and portable devices, and is smaller than the Mini USB interface.
Among them, standard A type, standard B type and Mini-B type are all defined in the USB 2.0 specification, and the Micro USB added in 2006
The specification is defined, adding the following definitions:
Micro-B plug and receptacle
Micro-AB receptacle
Micro-A plug