MIL-PRF-19500/337L
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:
a. Qualification inspection (see 4.2).
b. Screening (see 4.3).
c. Conformance inspection (see 4.4).
4.2 Qualification inspection. Qualification inspection shall be in accordance with MIL-PRF-19500 and as specified
herein.
4.2.1 Group E qualification. Group E inspection shall be performed for qualification or re-qualification only. In
case qualification was awarded to a prior revision of the specification sheet that did not require the performance of
table II tests, the tests specified in table II herein that were not performed in the prior revision shall be performed on
the first inspection lot of this revision to maintain qualification.
4.3 Screening (JANTX and JANTXV levels). Screening shall be in accordance with table E-IV of MIL-PRF-19500
and as specified herein. Specified electrical measurements shall be made in accordance with table I herein. Devices
that exceed the limits of table I herein shall not be acceptable.
Screening
(see table E-IV of
JANTXV and JANTX level
MIL-PRF-19500)
(1) 3c
Thermal impedance (see 4.3.2)
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Not required
Method 1038 of MIL-STD-750, condition A
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IR1 and VF1
(2) 11
12
See 4.3.1
Subgroup 2 of table I herein;
Ć IR1 = 100 percent of initial value or 15 nA dc,
(3) (4) 13
whichever is greater;
ĆVF1 = 25 mV dc.
(1) Thermal impedance shall be performed any time after sealing provided temperature cycling is performed in
accordance with MIL-PRF-19500, screen 3 prior to this thermal test.
(2) Test within 24 hours after removal from test.
(3) When thermal impedance is performed prior to screen 13, it is not required to be repeated in screen 13.
(4) PDA ≤ 5 percent.
* 4.3.1 Power burn-in conditions. Power burn-in conditions are as follows (see 4.5.2): Method 1038 of
MIL-STD-750, condition B. VR = rated VRWM; f = 50 - 60 Hz; IO(min) = 200 mA dc or IF = 200 mA dc minimum =
IO(PCB). TA = +75°C maximum. The maximum current density of small die shall be submitted to the qualifying activity
for approval. Alternate mounting conditions shall be submitted to the qualifying activity for approval. With approval of
the qualifying activity and preparing activity, alternate burn-in criteria (hours, bias conditions, and mounting
conditions) may be used for JANTX and JANTXV quality levels. A justification demonstrating equivalence is required.
In addition, the manufacturing site's burn-in data and performance history will be essential criteria for burn-in
modification approval.
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