R XC4000E and XC4000X Series Field Programmable Gate Arrays XC4000XL Electrical Specifications Definition of Terms In the following tables, some specifications may be designated as Advance or Preliminary.
These terms are defined as follows: Advance: Preliminary: Unmarked: Initial estimates based on simulation and/or extrapolation from other speed grades, devices, or devicefamilies.
Values are subject to change.
Use as estimates, not for production.
Based on preliminary characterization.
Further changes are not expected.
Specifications not identified as either Advance or Preliminary are to be considered Final.
Except for pin-to-pin input and output parameters, the a.
c.
parameter delay specificati...

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