USB 2.0

设计说明：

保护应用：

The data signals used in a USB 2.0 port vary between 0V to +0.5V, with a maximum data rate of 480Mbps.

到达该数据传输率时，应最小化抑制器的电容量。

需避免受到ESD影响的信号线包括D+和D-。 同时也需要防止5VDC电源总线受到ESD和过电流的危害。

解决方案说明：

As shown at the left, the data lines can be protected from voltage transients through a range of Littelfuse devices.

For lowest possible clamping voltage (lowest dynamic resistance), Littelfuse TVS Diode Array (SPA) devices should be used; for lowest possible capacitance Littlfuse PulseGuard (PGB) devices should be used:

Solution A) Two-channel Silicon (SPA) TVS Diode Array solution (SP3003 series shown)

Solution B) By a two-channel Polymeric PulseGuard suppressor (PGB102ST23 device)

Solution C) By discrete Polymeric PulseGuard suppressors in pair (PGB1010402 or 0603 devices)

配套解决方案：

Other protective solutions are recommended. For the power bus a resettable 1206L Series PTC is advised for overcurrent protection, and an MLA Series Multiplayer Varistor for ESD voltage transient suppression.

监管问题：

IEC 61000-4-2是最适合此接口的标准规范。 通过该测试可证明终端产品不易受到ESD危害。

特性：

不适用。

应用警告：

不适用。