- The Most Popular Free Spice to IBIS Conversion Tool


The command language for running S2IBIS3 conforms to the command structure of S2IBIS3 with the exception of the [Summarize] keyword - which has not been implemented.

A key feature that has been implemented in S2IBIS3 is the capability of handling convergence issues with Hspice. If non-convergence is detected, the user is asked to enter new sweep values for the beginning and the end of the sweep. Spice is again run with the new values and if again faces non-convergence, comes back and asks for new values again. This procedure is repeated until spice converges or user aborts. Convergence help is only implemented for Hspice. Convergence specific information for other simulators are welcome so that convergence handling could be extended to other engines.

The language used is Java is a single version of the utility that should be compatible with the various platforms available. S2IBIS3 has been tested on solaris 5.7 (HSpice and Spectre) and win XP(HSpice). This version is also backward compatible to older versions of IBIS(ver 1 and 2.1).

This is a Java program - as such java (v 1.4.1 or better) needs to be installed on the user machine. More instructions are provided in the README file.

In this release, ibis v3.2 specific keywords such as [series MOSFET], [series pin mapping] and [series switch groups] and other related keywords are supported.

Having trouble installing S2IBIS3? There is an FAQ here to help you with basic questions regarding setup and other issues.

If you have any comments, bug reports, or suggestions for features, please REPORT.


Old FAQ Page from NCSU

Other Links

Download (or download from NCSU site)


The Software (s2ibis3) was created by North Carolina State University (NCSU). IO Methodology Inc.(IOMeth) took over all the responsibilities and rights on January 1st, 2008 with NCSU's permission (Prof. Paul D. Franzon).

The Software available below is under Copyright, IO Methodology Inc. All rights reserved.

IOMeth grants the bearer the right to modify, copy, and redistribute the software and documentation, but requests that IOMeth be acknowledged for its contribution in the resulting product. 
IOMeth hereby disclaim all implied warranties, including the implied warranties of merchantability and fitness for a particular purpose. IOMeth is not liable for any damages incurred by the use of the software and/or documentation, including direct, indirect, special, incidental, or consequential damages.