At process technologies of 65 nanometers and below, designers face a plethora of new modeling challenges such as high-impedance interconnect, Miller effect, driver weakening, low power design and increasing process variation. Current-source modeling technology effectively addresses these challenges. Current-source models increase accuracy by using current waveforms instead of delay and slew values in the library. Proper segmentation and verification of current waveforms are crucial to current-source model fidelity. Previous generation library characterization engines were designed for delay and slew measurements and lacked the infrastructure to support efficient current waveform segmentation and verification. The Liberty™ NCX solution is a complete library delivery system specially architected for current-source models that features anoptimized, single-pass Composite Current Source (CCS) library generation flow that performs simultaneous characterization and model accuracy verification. Liberty NCX also includes a suite of library quality assurance, compaction, merging, scaling and adaptation tools. These tools provide unsurpassed flexibility in delivering verified libraries at scaled voltage or temperature corners for tool flows from multiple vendors. Liberty NCX supports all the latest open-source Liberty modeling innovations approved by the Liberty Technical Advisory Board (TAB).