What is the difference between SI in prime time and SI in HSPICE?

[Collang2]

Hello,
I'm working as a Static Timing Analysis engineer from ASIC company. I've been using prime time, and I know how to do SI analysis in Gate-Level Netlist.

I got the job description, and there is a "requirement of experience: PrimeTime, HSPICE"
1) What does the STA Engineer do with HSPICE?
2) And what is the difference between HSPICE SI and PrimeTime SI?

 

[ThisIsNotSam]

you can use HSPICE on some (few) select paths to get more accurate timing results than what you get from STA.
take any project you have, pick the most critical path and export it to a spice file. simulate it. be prepared to see 1-3% difference.
you can also calibrate error margins in physical synthesis with HSPICE results that way.

SI, assuming you mean coupling/glitching effects, will be more detailed in HSPICE too. but it comes with a cost, you cannot do whole chip SI analysis in HSPICE.

 

[tepalia02]

HSPICE tends to offer higher accuracy due to its detailed transistor-level modeling, but it comes at the cost of longer simulation times. PrimeTime sacrifices some accuracy at the transistor level for faster results, making it more suitable for larger designs and higher-level analysis.