MIL-PRF-19500/477K
4.3 Screening (JANS, JANTXV and JANTX levels only). Screening shall be in accordance with appendix E, table
E-IV of MIL-PRF-19500, and as specified herein. The following measurements shall be made in accordance with
Screen (see
JANS level
JANTXV and JANTX level
appendix E,
table E-IV of
MIL-PRF-19500)
(1) 3c
Thermal impedance (see 4.3.1)
Thermal impedance (see 4.3.1)
9
Not required
IR1, VFM1 or VFM4.
10
Method 1038 of MIL-STD-750, condition A
Method 1038 of MIL-STD-750, condition A
11
Required
Required
IR1, VFM1, or VFM4; ĆIR1 ≤ ±100 percent of initial
IR1, VFM1, or VFM4
reading or ±150 nA dc (1N5802, 1N5804,
1N5806) or ±500 nA dc (1N5807, 1N5809,
1N5811), whichever is greater.
ĆVFM ≤ ±0.05 V dc.
12
Required, see 4.3.2
Required, see 4.3.2
(2) 13
percent of initial reading or ±150 nA dc (1N5802,
initial reading or ± 250 nA dc (1N5802, 1N5804,
1N5804, 1N5806) or ±500 nA dc (1N5807,
1N5806) or ±1 µA dc (1N5807, 1N5809, 1N5811),
1N5809, 1N5811), whichever is greater.
whichever is greater.
ĆVFM ≤ ±0.05 V dc. Scope display evaluation
ĆVFM ≤ ±0.05 V dc. Scope-display evaluation (see
(see 4.5.2)
4.5.2).
(1) Shall be performed anytime after temperature cycling, screen 3a; TX and TXV levels do not need to be repeated in
screening requirements.
(2) ZθJX is not required in screen 13, if already previously performed.
4.3.1 Thermal impedance. The thermal impedance measurements shall be performed in accordance with method
3101 of MIL-STD-750 using the guidelines in that method for determining IM, IH, tH, and K factor where appropriate.
Measurement delay time (tMD) shall be 70 µs maximum. The limits will be statistically derived. See table E-IX of
MIL-PRF-19500, group E, and table II, subgroup 4 herein.
4.3.2 Free air power burn-in conditions. Power burn-in conditions are as follows (see 4.5.3 and 4.5.3.1): IO(min) =
IO1. TA = 55°C maximum. Test conditions shall be in accordance with method 1038 of MIL-STD-750, condition B.
Adjust IO or TA to achieve the required TJ. TJ = 135°C minimum. With approval of the qualifying activity and
preparing activity, alternate burn-in criteria (hours, bias conditions, TJ, 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.
4.3.3 Screening (JANHC and JANKC). Screening of die shall be in accordance with appendix G of
MIL-PRF-19500. As a minimum, die shall be 100-percent probed to ensure compliance with table I, subgroup 2.
Burn-in duration for the JANKC level follows JANS requirements; the JANHC follows JANTX requirements.
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