MIL-PRF-19500/394N
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 request the performance of
table III tests, the tests specified in table III herein that were not performed in the prior revision shall be performed on
the first inspection lot of this revision to maintain qualification.
4.2.2 JANHC and JANKC qualification. JANHC and JANKC qualification inspection shall be in accordance with
* 4.3 Screening (JANS, JANTXV, and JANTX levels only). Screening shall be in accordance with table E-IV of
MIL-PRF-19500 and as specified herein. The following measurements shall be made in accordance with table I
herein. Devices that exceed the limits of table I herein shall not be acceptable.
Screen (see table E-IV
Measurement
of MIL-PRF-19500)
JANS level
JANTX and JANTXV levels
(1) 3c
Thermal impedance, method 3131 of MIL-
Thermal impedance, method 3131 of
MIL-STD-750, (see 4.3.3).
9
Not applicable
ICBO2 and hFE1
10
48 hours minimum
48 hours minimum
ICBO2; hFE1; ĆICB02 = 100 percent of initial
11
ICBO2 and hFE1
value or 50 nA dc, whichever is greater;
ĆhFE1 = ±15 percent of initial value.
12
See 4.3.2
See 4.3.2
13
Subgroups 2 and 3 of table I herein;
Subgroup 2 of table I herein;
ĆICB02 = 100 percent of initial value
ĆICB02 = 100 percent of initial value
or 50 nA dc, whichever is greater;
or 50 nA dc, whichever is greater;
ĆhFE1 = ±15 percent of initial value.
ĆhFE1 = ±15 percent of initial value.
*
(1)
Shall be performed anytime after temperature cycling, screen 3a; JANTX and JANTXV levels do not
need to be repeated in screening requirements.
4.3.1 Screening (JANHC and JANKC). Screening of JANHC and JANKC die shall be in accordance with
MIL-PRF-19500, "Discrete Semiconductor Die/Chip Lot Acceptance". Burn-in duration for the JANKC level follows
JANS requirements; the JANHC follows JANTX requirements.
4.3.2 Power burn-in conditions. Power burn-in conditions are as follows: VCB = 10 - 30 Vdc. Power shall be
applied to achieve TJ = +135°C minimum using a minimum PD = 75 percent of PT maximum rated as defined in 1.3.
With approval of the qualifying activity and preparing activity, alternate burn-in criteria (hours, bias conditions, TJ, 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.
4.3.3 Thermal impedance. The thermal impedance measurements shall be performed in accordance with
method 3131 of MIL-STD-750 using the guidelines in that method for determining IM, IH, tH, tMD (and VC where
appropriate). See table II, subgroup 4 herein.
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