What is a USB connector/harness?

USB (Universal Serial Bus) is a standard for cables and connectors for connecting digital communication and power devices, and its specifications and standards are defined by USB-IF (USB Implementation Forum, Inc.). Let's explain the types and generations of USB standards. What is USB Type-C? Relationship between high-speed data transmission and transmission distance.

1: Type and generation of USB standard:

Before the advent of the USB standard, different types of connectors were used for different purposes to connect PCs to external peripherals. In 1996, USB 1.0 was developed to unify the interface. Since then, the technical specifications have been continuously updated, and more recently, the USB4 standard with a larger transfer rate of 20 Gbps/lane has been developed. The performance of USB technology is expected to continue to improve.

---------------------------------------------------------------------------------------------------

2: What is USB Type-C? ：

USB Type-C is one of the USB connector standards. It is a 24-pin connector for connecting USB compatible devices via cable. It is a high-performance external interface that is smaller than the traditional USB Standard-A but allows for reversible insertion and high-speed data transfer. Additionally, a new USB powered standard has been added to provide up to 20V 5A (100W).

Ultra-fast data transmission The USB 2.0 Standard A connector has only one channel for signal transmission, and the larger transfer rate is 0.48 Gbps/channel. The USB 3.0/3.1 Standard-A connector retains the USB 2.0 connector, but adds two new channels for high-speed signal transmission, enabling two-way communication. USB 3.0 supports higher data transfer speeds of 5 Gbps/channel and USB 3.1 supports higher data transfer speeds of 10 Gbps/channel. The USB Type-C connector has two additional channels for high-speed signal transmission, supports the USB4 standard, and a larger transfer rate of 20 Gbps/channel.

---------------------------------------------------------------------------------------------------

3: The relationship between high-speed data transmission and transmission distance:

The higher the speed of signal transmission, the greater the transmission loss, such as conductor loss and dielectric loss. , making signal transmission more difficult.

USB-compliant transmission distance Therefore, depending on the transmission standard, there are reference specifications for internal loss values called loss budgets. For example, in the USB4 specification version. 1.0 [Thunderbolt 4], a 20 Gbps (10 GHz)/channel high-speed transmission with a loss budget specified at-7.5 dB per cable and device. The longer the transmission distance, the greater the losses that occur in the transmission path. If the transmission distance reaches a certain level, high-speed signals such as USB4 can be transmitted using low transmission loss boards. However, the longer the transmission distance, the greater the loss that occurs in the transmission path, and it becomes more difficult to transmit signals within the loss budget. Therefore, if the transmission path is long, it is necessary to take measures to suppress losses generated in the transmission path.

---------------------------------------------------------------------------------------------------

4. Brief description of World Trade Electronic Products Network Company and its products sold:

World Trade Electronic Products Network is a professional, accurate and vertical comprehensive product sales platform for the electronic industry focusing on the supply, demand and sales of connector wiring harness and cable products! Specializing in the production/sales of {Connector Harness Cable Products}; If you want to buy or know which connector harness cable product solutions we can provide, please contact us through the following methods.