One question on the CMOS level

[chang830]

Hi,
I have q question on the definition of CMOs level.

I noticed the definition of the CMOS level is deifferent from the different articles. E.g.,soem gives the Voh>4.7V and Vol<0.2V. While others gives the Voh>0.7VCC and Vol<0.3VCC. Moreover, I just saw a paper deifines Voh>0.9VCC and Vol<0.1Vcc.

I was completely puzzled by this.

Would anyone pls. shed some light on it?

Thanks

 

[Sadegh.j]

May be it is because there are different modeling techniques, one might neglect some thing and the other might emphasize on it. What I know is that BSim is quite reliable.

 

[A.Anand Srinivasan]

it depends on the type of technology used too(35nm , 65nm etc) each have their own supply level and Voh Vol....

 

[pfd001]

It depends on the supply voltage and the technology.
Voh>4.7V and Vol<0.2V maybe the supply is 5V