I believe everyone has long been familiar with the USB socket and standard naming, including USB 3.0 and USB 3.1. However, they may be very puzzled by the subordinate USB standards. After all, after the unification, they are theoretically called USB 3.1. However, the market specifications are diverse and messy, and each customer's needs are their own standards. Not long ago, the USB promotion organization just announced the latest USB naming specifications. The original USB 3.0 and USB 3.1 naming of will be cancelled . All USB standards of will be called USB 3.2, and USB 3.0 to USB 3.2 are called USB 3.2 Gen 1, USB 3.2 Gen 2, and USB 3.2 respectively Gen 2x2. Now, the USB promotion organization has announced USB 4 again. USB 4 is here, what changes will the new standard bring? Not only does the transmission rate double, but it doubles the 20 Gbps transmission speed of USB 3.2 Gen 2x2, reaching the same 40 Gbps as Thunderbolt 3. In addition, USB 4 provides up to 100W of power, external graphics cards, two 4K monitors or single 5K monitors, etc. In addition, unlike the USB 3.0/3.1/3.2 era, using color interfaces for generational distinction, USB 4 does not have this requirement, and it is only recommended to use Type-C.
Actually, we need to correct everyone's concept here, USB 3.1 and USB Type-C It is not a symbiotic specification. Here is a basic popularization explanation for everyone. From then on, a Type-C cable goes to the world
USB Type-C. The main features are as follows:
does not have the distinction between front and back.
I believe everyone has long been familiar with the USB socket and standard naming, including USB 3.0 and USB 3.1. However, they may be very puzzled by the subordinate USB standards. After all, after the unification, they are theoretically called USB 3.1. However, the market specifications are diverse and messy, and each customer's needs are their own standards. Not long ago, the USB promotion organization just announced the latest USB naming specifications. The original USB 3.0 and USB 3.1 naming of will be cancelled . All USB standards of will be called USB 3.2, and USB 3.0 to USB 3.2 are called USB 3.2 Gen 1, USB 3.2 Gen 2, and USB 3.2 respectively Gen 2x2. Now, the USB promotion organization has announced USB 4 again. USB 4 is here, what changes will the new standard bring? Not only does the transmission rate double, but it doubles the 20 Gbps transmission speed of USB 3.2 Gen 2x2, reaching the same 40 Gbps as Thunderbolt 3. In addition, USB 4 provides up to 100W of power, external graphics cards, two 4K monitors or single 5K monitors, etc. In addition, unlike the USB 3.0/3.1/3.2 era, using color interfaces for generational distinction, USB 4 does not have this requirement, and it is only recommended to use Type-C.
Actually, we need to correct everyone's concept here, USB 3.1 and USB Type-C It is not a symbiotic specification. Here is a basic popularization explanation for everyone. From then on, a Type-C cable goes to the world
USB Type-C. The main features are as follows:
does not have the distinction between front and back.
is compatible with the connection specifications of the past USB 2.0, 3.0 and future USB specifications, supports 10,000 plug-ins and unplugging, and supports 3C product charging (if needs to use the high current function formulated by USB 3.1 PD, it is necessary to use Type C and special cables, and the original Type A/B cannot achieve ). The USB interface (Type A, B, etc.) mentioned in daily life and the USB Type C interface that will be unified in the future are all physical specifications of the interface, while USB2.0, USB3.0, USB3.1, etc. are related communication protocols.
USB Type-C This is The newly formulated connector specifications of USB Association. USB Type-C is published with USB3.1, so many people mistakenly believe that USB3.1 must be connected with USB Type-C to achieve 10Gb/s performance. Some people even wrote USB Type-C as USB3.1 Type-C, which is incorrect. .
USB3.0 and USB3.1 can have the same number of connection cables used, so using USB3.0 transmission cables can also achieve 10Gb/s performance. Let's take a look at the specifications provided in the figure below:
Of course, the faster the speed, the higher the quality requirements for the cable, when you use it. When using USB3.1 products, please try to use the cables provided by major manufacturers to avoid using poor quality cables, which will cause performance to not be improved. Especially for some HUB products with full functions in adapter ( Dongguan Zhongding Electronics Co., Ltd. 's 3.1 specification GEN2 high-speed cable can be recommended. Of course, you can refer to our supply chain information for more information: [Industry Sharing: High-frequency cable production supply chain]), USB Type-C connectors (connectors) can also be used in USB3.0 and USB2.0 connection transmission. There are many products that have been used, such as mobile phones, tablets, etc.
Now you can see from the specification upgrade of USB Type C, USB Type The C specifications in the future are improved to be able to transfer almost all specifications of data without losing speed and transmission quality (partially need to use the interface). So today, we will take this opportunity to review some basic knowledge about USB2.0, USB3.0, USB Type C, etc., so as not to be fooled by unscrupulous businessmen.
USB 1.0/2.0/3.0 meaning
USB 1.0/1.1
USB specifications were the first USB Implement composed of seven companies including Intel, IBM, Compaq, Microsoft, NEC, Digital, North Telecom, etc. Forum jointly proposed that USB1.0 specification was officially proposed in January 1996, with a bandwidth of 1.5Mbps. However, because there were few peripheral devices supporting USB at that time, motherboard merchants did not directly design USB Port on the motherboard.
USB 2.0
USB2.0 technical specifications were jointly formulated and published by Compaq, Hewlett Packard, Intel, Lucent, Microsoft, NEC, and Philips. The specification increased the peripheral data transmission speed to 480Mbps, which is 40 times that of USB 1.1 devices! The USB 2.0 standard formulated in 2000 is the real USB 2.0, which is called the high-speed version of USB 2.0. The theoretical transmission speed is 480 Mbps.
USB 3.0
USB 3.0 is the latest USB specification. This specification is initiated by Intel and other companies. The maximum transmission bandwidth of USB 3.0 is as high as 5.0Gbps (640MB/s). USB 3.0 introduces full-duplex data transmission. 2 of the 5 lines are used to send data, the other 2 are used to receive data, and 1 is a ground wire. That is to say, USB 3.0 can synchronize read and write operations at full speed.
USB Type A: This standard is generally applicable to personal computer PCs and is the most widely used interface standard
USB Type B: Generally used for 3.5-inch mobile hard disk , as well as printers, monitors, etc. to connect
Mini-USB: generally used for digital cameras, digital cameras, measuring instruments, mobile hard disks and other mobile devices
Micro USB: Micro USB interface, suitable for mobile devices
In the early era of smartphones, the one we used the most was based on USB The 2.0 Micro-USB interface, that is, the mobile phone USB data cable interface, has now begun to enter the TYPE-C interface mode. If the data transmission requirements are higher, it must be switched to 3.2 and above. Especially now that all physical interface specifications have been updated, the goal of USB-Ch is to unify the world. There was Thunderbolt™ suppression on high speed before, and the recent USB4 has been clear. We are going from low-end to high-end to unify the world. The Thunderbolt™ interface previously restricted its development mainly due to INTEL's patent fees, but now it has started to license freely, which will inevitably promote the expansion of its interface market. Intel announced a free license for Thunderbolt technology! Maybe Thunderbolt 3 Spring is in 2018! A wide range of interfaces can be replaced by the USB Type C interface that supports Thunderbolt 3.
It can be predicted that with the official start of Intel's royalty-free announcement, there will be more and more PC manufacturers and peripheral manufacturers using the Thunderbolt 3 protocol, and the number of peripherals continues to double every year. More than 450 certified devices come from a wide range of product categories (this historical article contains a list of current applications: Intel and Apple support, and the Thunderbolt 3 market is activated), including docking docks, monitors, storage and external graphics cards. The latest developments in Thunderbolt™ 3 technology
