Reliability; Environmental - Intel DQ57TM Specification

2.8

Reliability

The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Telcordia Issue 2,
Method I Case 3 50% electrical stress, 55 ºC ambient. The MTBF prediction is used to
estimate repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The MTBF for the board is
253,261 hours.
2.9

Environmental

Table 36 lists the environmental specifications for the board.
Table 36. Environmental Specifications
Parameter
Temperature
Non-Operating
Operating
Shock
Unpackaged
Packaged
Vibration
Unpackaged
Packaged
Specification
-40 °C to +60 °C
0 °C to +55 °C
50 g trapezoidal waveform
Velocity change of 170 inches/second²
Half sine 2 millisecond
Product Weight (pounds)
<20
21-40
41-80
81-100
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)
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
Free Fall (inches) Velocity Change (inches/sec²)
36 167
30 152
24 136
18 118
Technical Reference
65