MIL-PRF-19500/315G
* 4.3 Screening (JANS, JANTX, and JANTXV). Screening shall be in accordance with table E-IVb of
MIL-PRF-19500 (JANS, JANTX, and JANTXV), 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.
Measurement
Screen (see
table E-IV of
MIL-PRF-19500)
JANS level
JANTX and JANTXV levels
(1) 3c
Thermal impedance, method 3131 of
Thermal impedance, method 3131 of
MIL-STD-750 (see 4.3.1)
MIL-STD-750 (see 4.3.1)
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ICBO1 and hFE2
ICBO1
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ICBO1 and hFE2
ICBO1 and hFE2;
ICBO1 = 100 percent of initial reading or
ICBO1 = 100 percent of initial reading or 50
100 nA dc, whichever is greater.
nA dc, whichever is greater;
hFE2 = +15 percent, -10 percent
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See 4.3.2
See 4.3.2
Subgroup 2 of table I herein
13(a)
Subgroups 2 and 3 of table I herein; ICBO1 =
ICBO1 = 100 percent of initial value or 100
100 percent of initial value or 50 nA dc,
nA dc, whichever is greater;
whichever is greater;
hFE2 = +20 percent, -10 percent
hFE2 = +15 percent, -10 percent
13(b)
Method 1016 of MIL-STD-750, insulation
Method 1016 of MIL-STD-750 insulation
(2N3749 only)
resistance test condition B (short connector,
resistance test condition B (short connector,
emitter, and base terminals together)
emitter, and base terminals together)
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RISO = 10 ohms (min)
RISO = 10 ohms (min)
*
(1) Shall be performed anytime after temperature cycling, screen 3a; TX and TXV levels do not need to be
repeated in screening requirements.
* 4.3.1 Thermal impedance. The thermal impedance measurements shall be performed in accordance with method
3161 of MIL-STD-750 using the guidelines in that method for determining IM, IH, tH, tSW, (and VH where appropriate).
Measurement delay time (tMD) = 70 s max. See table II, group E, subgroup 4 herein.
4.3.2 Power burn-in conditions. Power burn-in conditions (all levels) are as follows:
a. TJ = 187.5 ±12.5C.
b. TA 100C.
c. VCE = 25 ±5 V dc.
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500, and as
specified herein.
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with MIL-PRF-19500, and table I
herein. (End-point electrical measurements shall be in accordance with table I, subgroup 2 herein.)
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