Macromodels for generating signal integrity and timing management advice for package design

The electrical design of packaging for high speed digital systems requires intensive efforts on the part of signal integrity engineers. We have produced a set of tools that assist these engineers in efficiently producing PCB and MCM designs that meet timing and other electrical needs. This paper describes the most important aspect of this solution, the internal ´macromodels´ that accurately capture the relationships between electrical/timing design and the package physical design (or layout).