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IBIS model question

IBIS model question

IBIS model question

(OP)

I'm a newbie to IBIS and I have this IBIS model from Altera. Note that I decimated the ramp data to shorten the post.

[Component] CycloneIV
[Manufacturer] Altera Corporation
[Package]
|
|4CE15_F23
|variable typ min max
R_pkg 411m 189m 705m
L_pkg 7.74nH 3.14nH 14.26nH
C_pkg 0.80pF 0.39pF 1.33pF
|
...
[Model] cmos33_cin
Model_type Input
Polarity Non-Inverting
|
Vinl = 0.8V
Vinh = 1.7V
C_comp 4.7pF 4.7pF 4.7pF
|
[Temperature Range] 25 85 0
[Voltage Range] 3.3 3.085 3.465
|
[GND Clamp]
| voltage I (typ) I (min) I (max)
|
-3.3000e+000 -1.4490e+000 -1.2860e+000 -1.5330e+000
-2.4051e+000 -9.4974e-001 -8.5049e-001 -1.0040e+000
-1.6220e+000 -5.1283e-001 -4.6970e-001 -5.4160e-001
-7.2712e-001 -3.4326e-002 -3.4915e-002 -4.3750e-002
9.5085e-001 0.0000e+000 0.0000e+000 0.0000e+000
1.0627e+000 0.0000e+000 0.0000e+000 0.0000e+000
2.1814e+000 0.0000e+000 0.0000e+000 0.0000e+000
3.3000e+000 0.0000e+000 0.0000e+000 0.0000e+000
|
[POWER Clamp]
| voltage I (typ) I (min) I (max)
|
-3.3000e+000 2.5580e-004 1.7510e-004 3.3640e-004
-2.2579e+000 8.5402e-005 3.7694e-005 1.3743e-004
-1.0421e+000 2.2892e-006 8.8075e-007 9.1835e-006
0.0000e+000 0.0000e+000 0.0000e+000 0.0000e+000
|
|
So is it correct that this when this CMOS input is between 0.0 and 3.3V under 'typ'ical conditions the model is just R_pkg (0.411 ohm) and L_pkg (7.74nH) in series with the combination of C_comp (4.7pF) in parallel with C_pkg (0.8pF)? There doesn't seem to be anything else in the model that applies between these voltages.

Is it really that simple?

Z

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