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AR# 24215

9.1i Timing - The PAR / Timing Analyzer Report lists the valid temperature range to be -40.000 to 100.000 Celsius

Description


What is the valid temperature range for prorating devices? When viewing the PAR / Trace report for Virtex devices, I see the following listed:



Initializing temperature to 85.000 Celsius. (default - Range: -40.000 to 100.000 Celsius).

Solution


The device family has been characterized over the -40 to 100 degrees Celsius. The timing analysis for all Xilinx devices is 0 to 85 Celsius. With the TEMPERATURE constraint, you can inform the timing analysis tools to use any temperature between -40 to 100 degree Celsius. The worst case analysis is based on the temperature of 85 degrees C and lowest voltage. The delay values will change, based on the TEMPERATURE constraint.



For more information on how to prorate for Industrial or Military spec devices, please see (Xilinx Answer 2945) and (Xilinx Answer 4235).
AR# 24215
Date Created 09/04/2007
Last Updated 07/06/2011
Status Archive
Type General Article