Hi, everyone,
When I use liberate to characterize some standard cells, like OAI21M0R at much lower voltage 0.3V. I set such parameter with auto-index.
set_var max_transition 1.2e-7
set_var min_transition 1.0e-8
set_var min_output_cap 1e-17
However, I get the following error reminder
.........*Error* (char_library -auto_index) : the maximum load for OAI21M1R:Z is smaller than the specified min_output_cap (5.80844e-18F <= 1e-17F). This problem might be caused by insufficient drive strength or a max_transition value that is too small.
If I increase the max_transition value, the D-flipflop cannot meet the sequential timing. Did anyone meet this question?