It is essential to minimize the load that is added to the data line with any kind of ESD protection measure when considering signal integrity, especially with high-speed USB 2.0 data. The DF4D6.8UG diode, which has a typical capacitance of just 1.3pF with a difference of only 0.02pF between the different lines, ensures maximum protection level while maintaining signal quality. Guaranteed ESD immunity is +/-8kV contact discharge according to IEC61000-4-2.
The DF4D6.8UG has a minimum reverse breakdown voltage of 6V and offers a typical clamp voltage of 10V. There is no significant load on the data line owing to a maximum reverse current of only 0.1µA, while a dynamic resistance of typical 0.7 ensures a high protection level in case of an ESD event.
With a combination of the two line protection diodes in a series configuration, the DF4D6.8UG can also be used in applications such as protection of RF antenna interfaces.
