Introduction

Charlib is an open-source standard cell library characterizer. It focuses on accuracy, ease of use, and fast runtime (in that order).

• Supports characterization of combinational and sequential cells

• Plots timing and I/O voltages

• Supports non-linear delay models in the Liberty file format (.lib)

• Runs characterization in parallel on multiple cores

• Easy-to-use, with YAML-based configuration

• Implemented in Python 3 with a modified PySpice backend

• Compatible with ngspice and Xyce

Additional features are being worked on constantly. If there’s something you’d like CharLib to do, please request a new feature.