1. Technology
libraries :.lib
Technology
library is a collection gates along with characteristics information of it.
Technology libraries are provided by fabrication house (such as TSMC, UMC etc.)
based on technology of manufacturing. Thus technology
libraries contain information about the characteristics and functions of each logic
cell provided in a semiconductor vendor’s library. Technology libraries are distributed and
maintained by semiconductor vendors (i.e. fabrication houses).
Thus a standard logic cell
library consists of:
Ø Logic cells of varied drive strength
Ø
Logic
cells of varied number of inputs.
Ø
Inverters
and buffers with equal rise and fall delay.
Ø
Complex
cells such as AOI, OAI
Ø
Variety
of both +ve and –ve edge triggered flip flops with different drive strengths, set reset options
Ø special cells: clock gating, Isolation, AOB
etc.
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