Standard cell libraries describe the layout of basic combinational and sequential logic gates like:
• inverters
• buffers
• ands
• ors
• nands
• nors
• muxes
• latches
• flip-flops
Standard cell libraries are generally called “reference” libraries. These reference libraries are
technology specific and are usually created and provided by an external ASIC vendor or internal
library group.
In addition to standard cell libraries, reference libraries also contain pad cell libraries for signal IO and power/ground pad cells, as well as macro cell or IP libraries for reusable IP like RAMs,
ROMs, and other predesigned, standard, complex blocks.
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