[SI-LIST] : Looking for corner PCI spice models

McCormick, Robert (robertm@seussnt.stratus.com)
Mon, 13 Apr 1998 15:10:03 -0400

I'm looking for best case (fast-fast) and worst case (slow-slow) spice
models which correspond to the best and worst case V/I curves in the PCI
local bus specification (rev 2.1). I tried using the PCI spice models
which come with HSPICE but the VI curves are not worst case.
Specifically, the high state vi curve voltages are higher in voltage for
a given current. For example, at I=0 amps, V=Vcc=5V-Vtolerance (rather
than 2.4v per the pci spec). Since the HSPICE model is a 5V CMOS
device, I kind of expected this anyway (i.e., Voh ~ Vcc).
The case I'm worried about is when a 3.3v device is driving a 5V PCI
bus. Does anyone out there know of any available 3.3v PCI SPICE models
which come somewhat close to the worst case 5V vi curves in the PCI spec

Bob McCormick
Stratus Computer
Marlboro, MA 01752
Tel: 508-460-2485