I. Introduction
The first step required to understand the electromagnetic susceptibility of a complex electronic equipment is to analyze the behavior of its integrated circuits (IC) when affected by disturbances. In particular, the IC electromagnetic immunity is of paramount importance in communication system networks in noisy environments. Today, in automotive, avionic or industrial environments, well-designed network standards are able to provide data integrity and performance requirements of safety critical systems at a reasonable effort. These network-based systems offer a significant weight reduction, lower development cost, and substantial procurement and maintenance savings compared to dedicated communication systems. This is mainly achieved using a network backbone which serves as a shared resource for the communication between multiple modules. Every module communicates using a transceiver as an interface between the local digital information and the signaling through the network. Hence, the performance of the IC transceiver when affected by disturbances is one of the main factors guaranteeing the electromagnetic (EM) immunity of the whole equipment. The IC noise susceptibility needs to be addressed with the IEC direct power injection (DPI) test [1] and an accurate immunity model has to be generated in order to simulate the operation of communication networks for design-phase assessment of signal integrity and electromagnetic compatibility (EMC) problems.