ESD Protection on the D+/D- Lines in CY7C65620 - KBA91164

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    Question: How can you protect the D+/D- lines in CY7C65620 from being permanently damaged by ESD?



    For protection on D+/D- lines, you can use protection diode arrays like NUP4201DR2. More information on this device can be found at This can be used on both the upstream and the downstream ports of the HUB to ensure protection at both ends.

    The USB 2.0 high-speed electrical specification mandates no impedance other than a 90Ω differential impedance between the D+ and D- lines. The aforementioned ESD diodes are designed taking this requirement into consideration.