Re: about offseting the pu and pc

Syed,

This is handled by fixing the sweep range for all three curves to be
equal to the TYP curve sweep range, and then

    - if it's a ground clamp or pulldown curve, setting the sweep
      starting voltage to be the same for all three columns. Thus you get:

            TYP: -3.3V to 6.6V
            MIN: -3.3V to 6.6V
            MAX: -3.3V to 6.6V

    - if it's a power clamp or pullup curve, offsetting the sweep
      starting voltage for the MIN and MAX columns by (Vcc_min -
      Vcc_typ) and (Vcc_max - Vcc_typ), respectively. Thus you get:

            TYP: 6.6V to -3.3V (Vcc = Vcc_typ = 3.3V)
            MIN: 6.3V to -3.6V (Vcc = Vcc_min = 3.0V)
            MAX: 6.9V to -3.0V (Vcc = Vcc_max = 3.6V)

Thus for all three columns Vtable is the same.

Regards,

Alan

> If each voltage table gets offset by it's respective Vcc, how
> do you still end up with one voltage col that is applicable
> to all three current columns ?
>
> For example, If I sweep from Vcc to 2Vcc, I get the following
>
> For TYP, sweep range is : 3.3V to 6.6V
> MIN, sweep range is : 3.0V to 6.0V
> MAX, sweep range is : 3.6V to 7.2V
>
> After Vcc offset for each table,
>
> TYP range is : 0.0 to -3.3V (offset by 3.3V)
> MIN range is : 0.0 to -3.0V (offset by 3.0V)
> MAX range is : 0.0 to -3.6V (offest by 3.6V)
>
> How do you end up with one voltage col that is applicable to
> all there current columns ?? The datapoints are different for
> each voltage table.

-- 
Alan Glaser                         "It's not a competition,
ECE Dept.                            it's just a mint..." - K
North Carolina State University