[ibis-quality] First pass documentation for VT/Ramp/Component Section/Model limitations
- From: Barry Katz <bkatz@xxxxxxxxxx>
- To: Robert Haller <rhaller@xxxxxxxxxx>, ibis-quality@xxxxxxxxxxxxx
- Date: Tue, 03 Dec 2002 07:13:03 -0500
All,
I have put this in outline form for now. I want to make sure I have all the
points highlighted prior to formatting into agreed upon template.
Barry
Component Section
* Level 0
* Package parasitics
* Must be defined on a component
* Optional on pins, but if not defined must use NA NA NA
* Parasitics must be reasonable L <10nF, C <20pF, R <1 ohm
* External Package model
* Physical/Logical/Model Pin Mapping
* Models must exist in file or refer to Model Selector
* Pin names should not exceed 20 characters (to change?)
* No Connects represented with NC
* Power pins must be indicated POWER
* Gnd pins must be indicated GND
* Special Pins (e.g. analog) to be represented by NC with note
* Diff pin sections
* If defined, physical pins must exist
* Vdiff must be defined and reasonable
* Skew data must be defined and reasonable
* Same models must exist on both pins of a diff pair
* Model Selector
* All models must be valid
* First should be default
* Level 1
* Package parasitics
* Package parasitics are validated against data sheet
* Physical/Logical/Model Pin Mapping
* Mapping is validated to be complete and correct
* Power, Gnd, NC pins validated
* All pins defined
* Model Selector
* First model confirmed to be default
VT Curves/Ramp Data
* Level 0
* Should have four VT curves
* 50 Ohm Pullup (Pullup Voltage = Voltage)
* Rising
* Falling
* 50 Ohm Pulldown
* Rising
* Falling
* Noted Exceptions
* TBD
* VT Curves and Ramp should be consistent
* VT Curves must be monotonic
* VT Should be consistent with IV curves
* Ramp data should not be zero
* No negative ramp values
* Level 1
* Ramp should be measured from 20-80% of swing
* Ramp typ/min/max order verified
* VT Curves must be visually inspected
* Should be well behaved with continuous second derivative
* VT point density should be increased in areas with non-zero second
derivative
* Excess VT points in beginning and end of VT curves should be removed
* Relative position between all curves should be maintained
* Final DC value must be achieved
* Simulations run and confirmed? New section?
Model Limitations
* Level 0
* Identification of any known limitations in model
* Examples include PVT
* Keywords that may be placeholders(such as Vih/Vih)
* LVDS restrictions
* etc
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