20071029_CP_SECD_TS_99AND8082/D ESD Protection for Dual USB 2.0 Port Using the Low Capacitance TVS Diode Array, NUP4201DR2 Device http://onsemi.com Prepared by: Alejandro Lara Applications Engineer APPLICATION NOTE ABSTRACT Even though ESD protection is not yet required by the USB 1.1 and USB 2.0 specifications, it is extremely important and necessary that all USB ports have protection against ESD conditions because USB components are subject to electrostatic discharge conditions since USB is a hot plugging and unplugging system. Our modern society has rapidly come to fully depend on electronics. And modern computers are based increasingly on low power logic chips, all with ESD sensitivity due to MOS dielectric breakdowns and bipolar reverse junction current limits. The USB ICs are not an exception since the ……