On the Interface of USB Connector

USB is Universal Serial Bus, and its Chinese name is Universal Serial Bus. A way to interconnect electronic products. Applied to mobile, audio-visual, automotive electronics, multimedia, electrical appliances and other categories. At present, it has been widely used in various kinds of external equipment. There are three kinds of USB interfaces: USB1.1 and USB2.0, usb3.0. In theory, the transmission speed of USB 1.1 can reach 12 Mbps/s, while that of USB 2.0 can reach 480 Mbps/s, and can be downward compatible with USB 1.1. The USB 3.0 transmission rate is about 3.2 Gbps (320 MB/S). The theoretical maximum rate is 5.0 Gbps (500 MB/S).

USB uses a four-pin plug as the standard plug. With this standard plug, all peripherals can be connected in the form of chrysanthemum chain without loss of bandwidth. USB standard divides USB into five parts: controller, controller driver, USB chip driver, USB device and customer driver for different USB devices.

USB needs the support of host hardware, operating system and peripherals to work. At present, the main board generally adopts control chipset supporting USB function, and also installs USB interface slot. Windows 98 and above operating systems have built-in support for USB interfaces (but Windows NT does not yet support USB). At present, there are many USB peripherals such as digital cameras, digital speakers, scanners, keyboards, mice and so on.

With the popularity of a large number of personal computers supporting USB, it is a general trend that USB gradually becomes the standard interface of PC. The latest PC almost 100% supports USB. On the other hand, devices using USB interface are also developing at an alarming speed. At present, we use the USB 1.1 standard interface, its transmission speed is 12 Mbps.

USB 2.0 Standard

COMPAQ, Hewlett Packard, Intel, Lucent, Microsoft, NEC and PHILPS have jointly developed the USB 2.0 interface standard. USB 2.0 increases the speed of data transmission between devices to 480 Mbps, about 40 times faster than the standard of USB 1.1. The biggest advantage of the speed increase for users is that users can use more efficient external devices, and peripheral devices with multiple speeds can be connected to USB 2.0 lines, unlike USB 1.1. In the era, because of the high bandwidth, more devices do not need to worry about the bottleneck effect of data transmission. USB 2.0 can use the same specifications of cables in the original definition of USB, and the specifications of connectors are exactly the same. It maintains the excellent features of USB 1.1 under the premise of high speed, and also guarantees downward compatibility.

Netizens are asking

Q: What is the role of USB connectors?

Answer: The USB connector plays the main role of connection, which is used for data transmission between devices.

Question: What are the types of coatings for USB connectors and what are their functions?

Answer: General connector coating is divided into: gold plating, silver plating and tin plating; according to the application requirements, the thickness of different coatings is also different; and the main role of connector coating is: 1. good conductivity; 2. reducing impedance; 3. improving strength and wear resistance; 4. anti-corrosion.

Q: Is the USB connector for wireless mouse universal?

Answer: No, the mouse is generally used for radio transmission. The radio reception and sending frequency of each mouse are different!

Q: Why is the fixed pin of USB connector different?

Answer: On the surface, USB connectors have no curling edges on the seats. Most of the mothers have curling edges, but some machines have no curling edges in order to save space. For the base, the difference between curling and non-curling is as follows:

First, no curling in order to save space, but also to match the beauty of the shell panel.

Secondly, there are curling edges, which can facilitate male and female interpolation.

Thirdly, the crimped edge can be grounded with the outer shell iron shell, which can be more closely contacted.