Datasheet

Technical Reference
51
2.7 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability
Prediction Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF
prediction is used to estimate repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC.
Table 23 shows the MTBF
value for each of the D201GLY board’s manufacturing options:
Table 23. MTBF Values
Product Code MTBF Value
LAD201GLYT 327175.8832 hours
LAD201GLY 327175.8832 hours
BOX/BLKD201GLYL 339835.5196 hours
LAD201GLYT1 327175.8832 hours
LAD201GLYL1 327175.8832 hours
BOX/BLKD201GLYL1 339835.5196 hours
2.8 Environmental
Table 24 lists the environmental specifications for the board.
Table 24. Environmental Specifications
Parameter Specification
Temperature
Non-Operating
-40 °C to +70 °C
Operating
0 °C to +55 °C
Shock
Unpackaged 50 g trapezoidal waveform
Velocity change of 170 inches/second
Packaged Half sine 2 millisecond
Product Weight (pounds) Free Fall (inches) Velocity Change (inches/sec
2
)
<20 36 167
21-40 30 152
41-80 24 136
81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged 5 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz