Input / Output Buffer Information Specification

from Wikipedia, the free encyclopedia

Input / Output Buffer Information Specification ( IBIS for short ) is a method for describing the electrical behavior of electronic components . It is standardized as ANSI / EIA -656A. The first version of the standard was published in 1993, the current version is 7.0 from March 2019.

The motivation behind IBIS is to obtain models of the electrical behavior of components, which can be used in circuit simulations to e.g. B. to be able to analyze the signal integrity or the electromagnetic compatibility of a circuit.

In contrast to SPICE models, IBIS models do not describe the functionality of the component, but only the behavior of the inputs and outputs such as the dynamic switching behavior, the inductance and capacitance occurring at the connection and the current and voltage behavior . In this way, electronics manufacturers can supply IBIS models of their components without revealing details about the internal structure of the component. In addition, IBIS models are significantly more efficient than SPICE models for complex components such as microprocessors .

Algorithmic Modeling Interface

With version 5.0 the Algorithmic Modeling Interface (IBIS-AMI) extension was decided. Using IBIS-AMI models also can SerDes - transceiver can be simulated. The IBIS model is accompanied by an algorithmic model in the form of a dynamic link library (DLL) and a short description file, usually with the file extension .ami . This data is used by the circuit simulator to simulate not only the electrical but also the algorithmic behavior of a transceiver. This also enables a simulation of a large number of internal states, which would not be possible with a SPICE model within a reasonable time frame.

Web links