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Environmental stress screen (ESS) temperature |
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|  MIL-C-70490(AR)
3.2.3 Reliability. When specified in the contract, a special
sample shall be subjected to reliability testing. The
manufacturing and production techniques emloyed in the fabrication
of the memory shall not degrade the inherent reliability. The
inherent reliability shall not be less than 77,534 hours Mean Time
Between Failures (MTBF). (See 4 and 6)
3.3 Environmental. The memory shall meet the requirements
specified herein unless otherwise specified.
3.3.1 Room ambient temperature. The requirements of this
specification shall be met with the memory thermally stabilized at
room ambient temperature of +16c to +32C (+60F to
+90F), unless otherwise specified in the requirements paragraph.
3.3.2 Environmental stress screen (ESS) temperature. The
memory shall meet the requirements of 3.2.1.1 and 3.2.1.7
inclusive, after having been exposed to a minimum of ten
temperature cycles at temperatures Of -57C and +71C (-71F
0
and +160 F).
3.3.3 Environmental stress screen (ESS) vibration. The
memory shall meet the requirements of 3.2.1.1 and 3.2.1.7
inclusive, after having been subjected to a random or pseudorandom
vibration which includes frequency content from 100 Hz to 1000 Hz
and up to a 39 RMS in two axis for a period of 10 minutes plus or
minus 15 seconds.
3.4 Fabrication. The memory shall be manufactured in
accordance with drawing 9379230-1.
3.5 First article. When specified in the contract, a sample
shall be subjected to first article inspection (See 4 and 6).
3.6 Workmanship. The workmanship requirements of MIL-F-13926
and MIL-STD-454 shall be met.All components shall be fitted
properly and firmly in their respective positions. All electrical
connections shall be mechanically secure and electrically sound.
There shall be no evidence of corrosion, burrs, roughness, sharp
edges or other defects which could adversely affect its use or
suitability for the purpose intended.
3.7 Materials. Materials shall be in accordance with
drawings, material specifications and general specifications
forming a part of this specification.
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