
2
MTBF reliability predictions
19
MTBF reliability predictions
The predicted MTBF for Q35 motherboards at 35ºC and 55ºC are shown in
Table 17
. The
predictions are based on Telcordia SR-332 Issue 1, Method 1, Case 3 with the following
underlying assumptions:
50% default stress ratio for all modeled components
Application-specific stress ratios applied for electrolytic capacitors when available
Ground benign in a controlled environment
Level II quality grade on all components
Mechanical components are not modeled
No burn-in or pre-testing specified
MTTR specified to be 30 minutes
No component-specific thermal rises or other voltage/current stress applied
Relex 7.7 modeling software
Table 17. MTBF reliability predictions
Product code
MTBF (hours) @ 35ºC
MTBF (hours) @ 55ºC
PLV03-0-0
423,562
222,005
PLVDS03-0-0
382,598
200,534
Содержание PL35Q
Страница 1: ...www radisys com PROCELERANT ENDURA Q35 MOTHERBOARD PRODUCT MANUAL 007 03198 0000 December 2007 PL35Q ...
Страница 6: ...6 ...
Страница 8: ...8 ...
Страница 20: ...2 Product Specification 20 ...
Страница 38: ...3 Hardware Reference 38 ...
Страница 58: ...A Connector Description 58 ...
Страница 72: ...C 72 ...