Can IBIS model SSO(Simultaneous Switching Output) ?
IBIS as a model, has the key parameters required to model an SSO event. These are mainly the package inductance, other associated parasitics and the number of buffers switching. IBIS specifies R, L and C in matrix format and the use of a matrix for the inductance accounts for the “loop”inductance i.e. the mutuals between the pins. Specifying the mutual inductance is necessary to account for SSO event simulation. [Pin Mapping] keyword was specifically defined in IBISv4.0 to handle SSO defination. Simulating SSO depends on the model provided and the simulator used. 7: Why do we need to sweep -Vcc to 2Vcc ? Simulation accuracy is greatly enhanced by the “beyond-the-rail” data. Overshoot and undershoot generally fall within this range, and the range encompasses the forward-biased regions of protection diodes often used on buffers. Also, reflections caused by improper terminations can produce voltages at the driver/receiver terminals from -Vcc to 2Vcc. The drivers and receivers, therefore,
