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AR# 4235

14.x Timing - What temperature was used to obtain the results in the Timing Analyzer data sheets (Military vs. industrial parts)?


Military and industrial temperature grade parts can run over a wider temperature range than commercial parts. If I am using industrial or military parts, do I need to add a degradation factor to the values provided by the Timing Analyzer if the parts will be run at a high temperature?


No, it is not necessary to add a degradation factor to the values provided by the Timing Analyzer if the parts will be run at a high temperature.

Timing Analyzer uses worst-case delays on parts that are running within specification. The same is true for the values provided in the data sheets.

Among temperature-graded parts, military and industrial parts run at the same speed as the commercial equivalent, but at higher temperatures and at lower voltages. The performance of these parts is guaranteed over a wider range of operating conditions.

For example:
For a given part, "Tgls = 3.2ns (max)"

This means that Tgls for this part will never exceed 3.2 ns as long as the device is run within specifications.

For the VCC and junction temperature for temperature-graded parts, please refer to the Ordering Information for the data sheet for the specific device family.

(Parts run slowest at low VCC and high temperature.)

For more information, please see (Xilinx Answer 2945).

Linked Answer Records

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
38221 Vivado - Choosing "I" or "E" grade hides valid "XC" devices in the Vivado and PlanAhead part selector N/A N/A
AR# 4235
Date Created 08/21/2007
Last Updated 03/07/2013
Status Active
Type General Article
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