Input/Output Buffer Information Specification

Input Output Buffer Information Specification ( IBIS short ) is a method for describing the behavior of electronic components. It is standardized as ANSI/EIA-656A. The first version of the standard was published in 1993, current version is 5.0 (August 2008).

The motivation behind IBIS is to obtain models on the electrical behavior of devices which can be used in simulations to analyze, for example, the signal integrity and the electromagnetic compatibility of a circuit can.

IBIS models describe (in contrast to SPICE models ) not the functionality of the device, only the behavior of the inputs and outputs ( switching behavior, inductance, capacitance, voltage and current behavior). In this way, electronics manufacturers can provide models of their components, without revealing any details on the internal structure of the component. In addition, IBIS models are much more efficient than SPICE models ( especially for complex components such as processors).

Algorithmic Modeling Interface

With version 5.0, the Algorithmic Modeling Interface ( IBIS -AMI) was decided extension. Using IBIS - AMI models can now also SerDes transceivers are simulated. To the IBIS model an algorithmic model now comes in the form of a DLL and a brief description file (. Ami ). These are used by the simulator to simulate not only the electric, but also the algorithmic behavior of a transceiver. Thus, a simulation over millions of bits is possible, which would not be possible with a SPICE model within a reasonable time frame.