Littelfuse_Capacitance and Signal Integrity:ESD Suppressor Review In previous Technical Briefs, it was introduced that Littelfuse offers a family of ESD suppression technologies including ceramic MultiLayer Varistors (MLV’s), silicon (SP72x SCR/Diode and SP05xx TVS Avalanche Diode) Arrays, and polymer PulseGuard® suppressor products. These products perform the common function of providing ESD protection to electronic devices (cell phones, computers, PDA’s, flat panel displays, etc.). However, they have different electrical and physical characteristics which will help to define the specific circuit conditions (applications) for which they are the most appropriate. Properly selecting an ESD suppressor will provide protection to the circuit as well as maintaining the signal integrity of the data.