Load Capacitor for Inverter (TSMC 0.25 um)

[isaacnewton]

Hi All,

If I want to use TSMC 0.25um CMOS to design logic gate, like inverter, nand ... How much of the load capacitor I should choose when I do the simulation? If I use 50 fF, is it reasonable?

Thank you in advance.

 

[uladz55]

Hi,

Ususally TSMC provide Standart Cell Library for every process.
In this library you can find information about dynamic characteristic of standart cells for different loading.

 

[simonkuo]

It should be enough, if you don't use it as an output driver.
Just consider the line loading is ok.