Liberty CCS
   The semiconductor industry's most widely used library modeling standard.
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Welcome to Open Source Liberty!

Open Source Liberty is a comprehensive online resource for the Liberty library modeling standard. In addition to providing up to date Liberty format specifications for download, this site hosts the Liberty Discussion Forum, where members of the semiconductor community can interact with each other and discuss topics relating to Liberty and the Composite Current Source (CCS) modeling technology. This site also provides the latest news and information regarding Liberty and the Liberty Technical Advisory Board (LTAB).

About Liberty

The open source Liberty library modeling format is the semiconductor industry’s most widely supported library standard. Liberty is supported by:
  • Over 100 semiconductor vendors
  • Over 750 submicron libraries
  • Over 60 EDA vendors
  • Over 75 production EDA tools

About CCS

Composite Current Source (CCS) modeling technology is a revolutionary new innovation in Liberty. CCS is a unified current source model that delivers comprehensive, accurate and efficient modeling of nanometer effects. CCS models enable designers to perform complete timing, noise, power and statistical sign-off using a single, open library model.


Featured Article
Featured Articles
Synopsys boosts CCS with library tools
An updated version of the Library Compiler, used by virtually every Synopsys user to generate binaries for Synopsys tools, adds new support for that company's Composite Current Source (CCS) models.

 Liberty Technical Advisory Board
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Discussion Forum
Interact with other users
This forum is open to all discussions regarding the open source Liberty library format.