Effective Digital IO Pin Modeling Methodology Based on IBIS Model

IBIS (I/O buffer information specification) model is widely used in signal integrity analysis of on-board high-speed digital systems. IBIS model is converted equivalent SPICE behavioral model when used board-level simulations. It is important to represent accurately output buffer's switching characteristics converting IBIS model to SPICE behavioral model. This paper proposes a new modeling algorithm to represent output buffer's switching characteristics in IBIS model. The accuracy of the proposed algorithm has verified through SPICE simulation with other behavioral models.