User`s guide

Adjustin
g
Simulation Parameters 14
-21
Selectin
g
Propa
g
ation Dela
y
s
All of PSpice A/D’s digital devices, including the primitives and
library models, perform simulations using either minimum,
typical, maximum, or worst-case (min/max) timing
characteristics. You can select the delay circuit-wide or on
individual device instances.
Circuit-wide propa
g
ation dela
y
s
These can be set to minimum, typical, maximum, or variable
within the min/max range for digital worst-case timing
simulation in the digital setup dialog box.
To specif
y
the dela
y
level circuit-wide
1
From the Analysis menu, select Setup.
2
Click Digital Setup.
3
Choose the appropriate Timing Mode.
Part instance propa
g
ation dela
y
s
You can set the propagation delay mode on an individual device,
thereby overriding the circuit-wide delay mode.
To override the circuit-wide default on an
individual part
1
Set its MNTYMXDLY attribute from 1 to 4 where
By default, MNTYMXDLY is set to 0, thereby instructing
PSpice A/D to use the circuit-wide value defined in the
Digital Setup dialog.
1=minimum
2=typical
3 = maximum
4 = worst-case (min/max)
not
included
in: