In summary, TVS diode arrays are most commonly used to protect against ESD. Most ICs have some type of built in ESD protection, unfortunately this ESD protection is only considering the manufacturing environment and not real-world applications. The IEC61000-4-2 standard addresses ESD events seen in the field or at the system level which involves much higher current. As most manufacturers will test to this specification, external ESD protection will be required. Littelfuse TVS diode arrays will aid the designer in protecting their devices beyond the manufacturing level.