USB Hub Design - Part 5

ESD can lead to damage of the delicate internal circuitry of the host or peripheral transceiver. ESD protection is achieved by placing a transient voltage suppression (TVS) diode between the USB port and the USB controller.

It has two goals: to protect the device from ESD during plug-in or static electricity, and to protect the host PC’s USB port from damage due to over-voltage events on the device.

MCC’s ESD protection portfolio delivers low-capacitance, fast-acting suppression in compact form factors — optimized for board-level integration in space-constrained systems.

圖1列出了各個版本的性能對比。 USB 介面支援設備的隨插即用和熱插拔功能,人們經常用手來進行USB介面的插拔,極易在USB 介面引入靜電干擾。 靜電放電(ESD )容易造成USB介面晶片工作異常、甚至造成USB 連接埠元件毀壞。

Both devices provide comprehensive overvoltage protection, over-temperature protection, and electrostatic discharge (ESD) protection, ensuring stable and reliable system operation even in harsh environments.

USB 1.0/1.1 is a fairly uncommon standard used today in new systems but still at risk of high voltage strikes due to the external connector. An ESD strike can enter through the connector and can cause damage to the downstream components in the system.

摘要 通用串行总线(通常称为 USB) 是一种行业标准, 用于定义计算机和外设之间的通信、电源和连接器。 USB 标准有多种版本,范围从 1.5Mbps 到 40Gbps 不等,而更常见的标准是 USB 2.0 和 USB 3.x 。 还有多种连接器类型,例如 USB Type-A 和 USB Type-C® 。