JANTX2N2920L [MICROSEMI]

Small Signal Bipolar Transistor, 0.03A I(C), 60V V(BR)CEO, 2-Element, NPN, Silicon, SIMILAR TO TO-78, 6 PIN;
JANTX2N2920L
型号: JANTX2N2920L
厂家: Microsemi    Microsemi
描述:

Small Signal Bipolar Transistor, 0.03A I(C), 60V V(BR)CEO, 2-Element, NPN, Silicon, SIMILAR TO TO-78, 6 PIN

小信号双极晶体管
文件: 总23页 (文件大小:393K)
中文:  中文翻译
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The documentation and process conversion measures  
necessary to comply with this document shall be  
completed by 12 June 2013.  
INCH-POUND  
MIL-PRF-19500/355R  
12 March 2013  
SUPERSEDING  
MIL-PRF-19500/355P  
9 December 2011  
PERFORMANCE SPECIFICATION SHEET  
SEMICONDUCTOR DEVICE, UNITIZED DUAL TRANSISTOR, NPN, SILICON,  
TYPES 2N2919, 2N2920, 2N2919L, 2N2920L, 2N2919U, AND 2N2920U,  
JAN, JANTX, JANTXV, JANS, JANSM, JANSD, JANSP, JANSL, JANSR,  
JANSF, JANSG, JANSH, JANHC, JANHCM, JANHCD, JANHCP, JANHCL, JANHCR, JANHCF, JANHCG, JANHCH,  
JANKC, JANKCM, JANKCD, JANKCP, JANKCL, JANKCR, JANKCF, JANKCG, AND JANKCH.  
This specification is approved for use by all Departments  
and Agencies of the Department of Defense.  
The requirements for acquiring the product described herein shall consist of  
this specification sheet and MIL-PRF-19500.  
1. SCOPE  
1.1 Scope. This specification covers the performance requirements for two electrically isolated, matched NPN  
silicon transistors as one dual unit. Four levels of product assurance are provided for each device type as specified  
in MIL-PRF-19500. Two levels of product assurance are provided for die. RHA level designators “M”, “D”, “P“, “L”,  
“R”, “F”, “G” and “H” are appended to the device prefix to identify devices, which have passed RHA requirements.  
1.2 Physical dimensions. See figure 1 (similar to TO-78), figure 2 (surface mount), figure 3 (JANHCA and  
JANKCA die), and figure 4 (JANHCB and JANKCB die).  
1.3 Maximum ratings. Unless otherwise specified, TC =+25°C.  
Type  
I
V
V
V
EBO  
C
CBO  
CEO  
mA dc  
30  
V dc  
70  
V dc  
60  
V dc  
6
All types  
P (1)  
P (2)  
R
θJA  
R
θJC  
T
T
TJ and TSTG  
T
= +25°C  
T
= +25°C  
C
A
One  
section  
Both  
sections  
One  
section  
Both  
sections  
One  
section  
Both  
sections  
One  
section  
Both  
sections  
mW  
200  
mW  
mW  
mW  
°C/W  
°C/W  
°C/W  
°C/W  
°C  
350  
300  
450  
875  
500  
583  
388  
-65 to +200  
(1) For TA > +25°C, derate linearly 1.143 mW/°C, one section; 2.000 mW/°C, both sections.  
(2) For TC > +25°C, derate linearly 1.714 mW/°C, one section; 2.571 mW/°C, both sections.  
* Comments, suggestions, or questions on this document should be addressed to DLA Land and Maritime, ATTN:  
VAC, P.O. Box 3990, Columbus, OH 43218-3990, or emailed to Semiconductor@dla.mil. Since contact  
information can change, you may want to verify the currency of this address information using the ASSIST Online  
database at https://assist.dla.mil .  
AMSC N/A  
FSC 5961  
MIL-PRF-19500/355R  
1.4 Primary electrical characteristics of each individual section. Unless otherwise specified, TC =+25°C.  
hFE1  
|hfe|  
VCE(SAT)  
VCE = 5 V dc  
IC = 10 µA dc  
VCE = 5 V dc  
IC = 0.5 mA dc  
f = 20 MHz  
IC = 1 mA dc  
IB = 100 µA dc  
2N2919 2N2919L  
2N2920 2N2920L  
2N2920U  
2N2919U  
V dc  
0.3  
Min  
Max  
60  
240  
175  
600  
3.0  
20  
*
1.5 Primary electrical matching characteristics of each individual section. Unless otherwise specified, TC =+25°C.  
|VBE1 - VBE2  
|
1
|(VBE1 - VBE2 TA  
)
|
|(VBE1 - VBE2)TA |  
2
hFE 21  
hFE 22  
1
VCE = 5 V dc  
VCE = 5 V dc  
VCE = 5 V dc  
VCE = 5 V dc  
IC = 100 µA dc  
IC = 10 µA dc  
IC = 100 µA dc  
TA = +25°C and -55°C  
IC = 100 µA dc  
TA = +125°C and +25°C  
(1)  
mV dc  
5
mV dc  
0.8  
mV dc  
1.0  
Min  
Max  
0.9  
1.1  
*
2. APPLICABLE DOCUMENTS  
2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This  
section does not include documents cited in other sections of this specification or recommended for additional  
information or as examples. While every effort has been made to ensure the completeness of this list, document  
users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this  
specification, whether or not they are listed.  
2.2 Government documents.  
2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a  
part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are  
those cited in the solicitation or contract.  
DEPARTMENT OF DEFENSE SPECIFICATIONS  
MIL-PRF-19500  
DEPARTMENT OF DEFENSE STANDARDS  
MIL-STD-750 Test Methods for Semiconductor Devices.  
(Copies of these documents are available online at https://assist.dla.mil/quicksearch or https://assist.dla.mil or  
-
Semiconductor Devices, General Specification for.  
-
*
from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)  
2.3 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the  
text of this document and the references cited herein, the text of this document takes precedence. Nothing in this  
document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.  
2
MIL-PRF-19500/355R  
Dimensions  
Inches Millimeters  
Notes  
Symbol  
Min  
Max  
.370  
.335  
.260  
.041  
.160  
Min  
8.51  
7.75  
3.56  
0.23  
3.56  
Max  
9.40  
8.51  
6.60  
1.04  
4.06  
CD  
CD1  
CH  
HT  
LC  
LC1  
LD  
LL  
LU  
L1  
.335  
.305  
.140  
.009  
.140  
.200 TP  
5.08 TP  
9
10  
.016  
.016  
.021  
.041  
0.53  
See notes 10, 11, and 12  
.019  
.050  
0.41  
0.48  
1.27  
10  
10  
10  
8
L2  
P
.250  
.100  
6.35  
2.54  
Q
.050  
.045  
.034  
.010  
1.27  
1.14  
0.86  
0.25  
7
5, 6  
4, 5  
TL  
TW  
r
.029  
.028  
0.74  
0.71  
9
α
45°TP  
45°TP  
NOTES:  
1. Dimensions are in inches.  
2. Millimeters are given for general information only.  
3. Tab shown omitted.  
4. Lead numbers 4 and 8 are omitted on this variation.  
5. Beyond r maximum, TW shall be held to a minimum length of .21 inch (5.33 mm).  
6. TL shall be measured from maximum CD.  
7. Details of outline in this zone are optional.  
8. CD1 shall not vary more than .010 inch (0.25 mm) in zone P. This zone is controlled for automatic  
handling.  
9. Leads at gauge plane .054 - .055 inch (1.37 - 1.40 mm) below seating plane shall be within .007 inch  
(0.18 mm) radius of true position (TP) at a maximum material condition (MMC) relative to the tab at  
MMC. The device may be measured by direct methods or by the gauge and gauging procedures  
described on gauge drawing GS-1.  
10. LU applies between L1 and L2. LD applies between L2 and LL minimum. Diameter is uncontrolled in  
L1 and beyond LL minimum.  
11. For transistor types 2N2919 and 2N2920, LL is .500 inch (12.70 mm) minimum and .750 inch (19.05  
mm) maximum.  
12. For transistor type 2N2919L and 2N2920L, LL is 1.500 inches (38.10 mm) minimum and 1.750 inches (44.45  
mm) maximum.  
13. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.  
FIGURE 1. Physical dimensions 2N2919, 2N2919L, 2N2920, and 2N2920L (TO-78).  
3
MIL-PRF-19500/355R  
Dimensions  
Millimeters  
Min Max  
Symbol  
Inches  
Min Max  
BL  
.240  
.250  
.250  
.175  
.175  
.080  
.039  
.070  
.098  
.105  
.055  
.028  
6.10  
6.35  
6.35  
4.44  
4.44  
2.03  
0.99  
1.78  
2.49  
2.67  
1.39  
0.71  
BL2  
BW  
BW2  
CH  
LH  
LL1  
LL2  
LS1  
LS2  
LW  
.165  
4.19  
.044  
.026  
.060  
.082  
.095  
.045  
.022  
1.12  
0.66  
1.52  
2.08  
2.41  
1.14  
0.56  
Pin no.  
Transistor  
1
2
3
4
5
6
Collector no. 1  
Base no. 1  
Base no. 2  
Collector no. 2  
Emitter no. 2  
Emitter no. 1  
NOTES:  
1. Dimensions are in inches.  
2. Millimeters are given for general information only.  
3. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.  
FIGURE 2. Physical dimensions (2N2919U and 2N2920U) surface mount.  
4
MIL-PRF-19500/355R  
NOTES:  
1. Chip size................................................. .015 x .019 inch ±.001 inch (0.381 x 0.4826 mm ±0.0254 mm).  
2. Chip thickness........................................ .010 ±.0015 inch (0.254 ±0.0381 mm).  
3. Top metal ............................................... Aluminum 15,000Å minimum, 18,000Å nominal.  
4. Back metal.............................................. A. Gold 2,500Å minimum, 3,000Å nominal.  
B. Eutectic Mount - No Gold.  
5. Backside................................................. Collector.  
6. Bonding pad ........................................... B = .003 inch (0.0762 mm), E = .004 inch (0.1016 mm) diameter.  
7. Passivation............................................. Si3N4 (Silicon Nitride) 2 kÅ min, 2.2 kÅ nom.  
FIGURE 3. Physical dimensions (JANHCA and JANKCA die).  
5
MIL-PRF-19500/355R  
B
E
NOTES:  
1. Die size---------  
.018 x .018 inch (0.457 mm x 0.457 mm).  
.008 ±.0016 inch (0.203 mm ±0.04 mm).  
.0025 inch diameter (0.06 mm).  
.003 inch diameter (0.076 mm).  
Gold, 6,500 ±1,950Å.  
Aluminum, 19,500 ±2,500Å.  
Collector.  
SiO2, 7,500 ±1,500Å.  
2. Die thickness---  
3. Base pad--------  
4. Emitter pad-----  
5. Back metal-----  
6. Top metal------  
7. Back side------  
8. Glassivation---  
FIGURE 4. Physical dimensions (JANHCB and JANKCB) B version die.  
6
MIL-PRF-19500/355R  
3. REQUIREMENTS  
3.1 General. The individual item requirements shall be as specified in MIL-PRF-19500 and as modified herein.  
3.2 Qualification. Devices furnished under this specification shall be products that are manufactured by a  
manufacturer authorized by the qualifying activity for listing on the applicable qualified manufacturer's list (QML)  
before contract award (see 4.2 and 6.3).  
3.3 Abbreviations, symbols, and definitions. Abbreviations, symbols, and definitions used herein shall be as  
specified in MIL-PRF-19500 and as follows:  
hFE-1/hFE-2.............................................Static forward-current-gain-ratio. The matching ratio of the static forward-  
current transfer ratio of each section.  
RθJA .....................................................Thermal resistance junction to ambient.  
RθJSP(IS)................................................Thermal resistance junction to solder pads (infinite sink mount to PCB).  
|VBE1 - VBE2 |........................................Absolute value of base-emitter-voltage differential between the individual  
sections.  
|VBE1-2 (T1) - VBE1-2 (T2)| ................Absolute value of the algebraic difference between the base-emitter-  
voltage differentials between the individual sections at two different  
temperatures.  
3.4 Interface and physical dimensions. The interface and physical dimensions shall be as specified in  
MIL-PRF-19500 and on figures 1, 2, 3, and 4. No lead (Pb) shall be used in the construction of the die bonds.  
3.4.1 Lead finish. Lead finish shall be solderable in accordance with MIL-PRF-19500, MIL-STD-750, and herein.  
Where a choice of lead finish is desired, it shall be specified in the acquisition document (see 6.2).  
3.5 Radiation hardness assurance (RHA). Radiation hardness assurance requirements, PIN designators, and  
test levels shall be as defined in MIL-PRF-19500.  
3.6 Electrical performance characteristics. Unless otherwise specified herein, the electrical performance  
characteristics are as specified in 1.3, 1.4, 1.5, and table I.  
3.7 Electrical test requirements. The electrical test requirements shall be as specified in table I.  
3.8 Marking. Marking shall be in accordance with MIL-PRF-19500. The radiation hardened designator M, D, P,  
L, R, F, G, or H shall immediately precede (or replace) the device “2N” identifier (depending upon degree of  
abbreviation required).  
3.9 Workmanship. Semiconductor devices shall be processed in such a manner as to be uniform in quality and  
shall be free from other defects that will affect life, serviceability, or appearance.  
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 and tables I, II, and III).  
7
MIL-PRF-19500/355R  
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 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.  
4.2.1.1 Group E thermal response. With extremely small junction devices such as this one, a true thermal  
impedance cannot be measure, only calculated. While “thermal response” has been substituted for “thermal  
impedance” herein, the terms, units and procedure are essentially unchanged. Each supplier shall submit a thermal  
response (ZθJX) histogram of the entire qualification lot. The histogram data shall be taken prior to the removal of  
devices that are atypical for thermal response. Thermal response curves (from ZθJX test pulse time to RθJX minimum  
steady-state time) of the best device in the qual lot and the worst device in the qual lot (that meets the supplier  
proposed screening limit), or from the thermal grouping, shall be submitted. The optimal test conditions and  
proposed initial thermal response screening limit shall be provided in the qualification report. Data indicating how the  
optimal test conditions were derived for ZθJX shall also be submitted. The proposed maximum thermal response ZθJX  
screening limit shall be submitted. The qualifying activity may approve a different ZθJX limit for conformance  
inspection end-point measurements as applicable. Equivalent data, procedures, or statistical process control plans  
may be used for part, or all, of the above requirements. The approved thermal response conditions and limit for ZθJX  
shall be used by the supplier in screening and table I, subgroup 2. The approved thermal resistance conditions for  
RθJX shall be used by the supplier for conformance inspection. For product families with similar thermal  
characteristics based on the same physical and thermal die, package, and construction combination (thermal  
grouping), the supplier may use the same thermal response curves.  
4.2.2 JANHC and JANKC die. Qualification shall be in accordance with MIL-PRF-19500.  
8
MIL-PRF-19500/355R  
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  
of MIL-PRF-19500)  
Measurement  
JANS level  
JANTX and JANTXV levels  
(1) 3c  
9
Thermal response, method 3131 of  
MIL-STD-750  
Thermal response, method 3131 of  
MIL-STD-750  
hFE 21  
ICBO2, hFE3  
,
Not applicable  
hFE 22  
10  
11  
48 hours minimum  
48 hours minimum  
hFE 21  
hFE 21  
I
CBO2, hFE3  
,
ICBO2, hFE3,  
hFE 22  
hFE 22  
ICBO2 = 100 percent of initial value  
or 1 nA dc, whichever is greater.  
hFE3 = ±20 percent  
12  
13  
See 4.3.1  
See 4.3.1  
Subgroups 2 and 3 of table I herein;  
ICBO2 = 100 percent of initial value  
or 1 nA dc, whichever is greater;  
hFE3 = ±25 percent  
Subgroup 2 of table I herein; ICBO2 = 100  
percent of initial value or 1 nA dc, whichever is  
greater; hFE3 = ±25 percent  
(1) Shall be performed anytime after temperature cycling, screen 3a; and does not need to be repeated in  
screening requirements for JANTX and JANTXV levels..  
4.3.1 Power burn-in conditions. VCB = 10 - 30 V dc. Power shall be applied to achieve TJ =135°C minimum and  
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.  
4.3.2 Thermal response. For very small junction devices such as this, the term “thermal response” shall be used  
in lieu of “thermal impedance” although measurements shall be performed the same manner as thermal impedance in  
accordance with method 3131 of MIL-STD-750 using the guidelines in that method for determining I , I , t , tSW (VC  
M
H H  
and VH where appropriate). Measurement delay time (tMD) = 70 µs max. See table II, group E, subgroup 4 and  
figures 5 and 6 herein.  
4.3.3 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.  
9
MIL-PRF-19500/355R  
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500, and as  
specified herein. If alternate screening is being performed in accordance with MIL-PRF-19500, a sample of screened  
devices shall be submitted to and pass the requirements of group A1 and A2 inspection only (table E-VIb, group B,  
subgroup 1 is not required to be performed again if group B has already been satisfied in accordance with 4.4.2).  
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with MIL-PRF-19500, and table I  
herein.  
4.4.2 Group B inspection. Group B inspection shall be conducted in accordance with the conditions specified for  
subgroup testing in table E-VIa (JANS) of MIL-PRF-19500 and 4.4.2.1 herein. Electrical measurements (end-points)  
and delta requirements shall be in accordance with table I, subgroup 2 and 4.5.8 herein. See 4.4.2.2 for JAN,  
JANTX, and JANTXV group B testing. Electrical measurements (end-points) and delta requirements for JAN,  
JANTX, and JANTXV shall be after each step in 4.4.2.2 and shall be in accordance with table I, subgroup 2 and 4.5.8  
herein.  
4.4.2.1 Group B inspection, table E-VIa (JANS) of MIL-PRF-19500.  
Subgroup  
B4  
Method  
1037  
Condition  
VCB = 10 V dc.  
B5  
1027  
VCB = 10 V dc, PD 100 percent of maximum rated PT (see 1.3). (NOTE: If a failure  
occurs, resubmission shall be at the test conditions of the original sample.)  
Option 1: 96 hours min, sample size in accordance with table E-VIa of MIL-PRF-19500,  
adjust TA or PD to achieve TJ = +275°C minimum.  
Option 2: 216 hours min., sample size = 45, c = 0; adjust TA to achieve TJ = +225°C  
minimum.  
4.4.2.2 Group B inspection, (JAN, JANTX, and JANTXV). Separate samples may be used for each step. In the  
event of a lot failure, the resubmission requirements of MIL-PRF-19500 shall apply. In addition, all catastrophic  
failures during CI shall be analyzed to the extent possible to identify root cause and corrective action. Whenever a  
failure is identified as wafer lot or wafer processing related, the entire wafer lot and related devices assembled from  
the wafer lot shall be rejected unless an appropriate determined corrective action to eliminate the failures mode has  
been implemented and the devices from the wafer lot are screened to eliminate the failure mode.  
Step  
1
Method  
1026  
Condition  
Steady-state life: 1,000 hours minimum, VCB = 10 V dc, power shall be applied to achieve  
TJ = +150°C minimum using a minimum of PD = 75 percent of maximum rated PT as defined  
in 1.3. n = 45 devices, c = 0. The sample size may be increased and the test time  
decreased as long as the devices are stressed for a total of 45,000 device hours minimum,  
and the actual time of test is at least 340 hours.  
2
3
1048  
1032  
Blocking life, TA = +150°C, VCB = 80 percent of rated voltage, 48 hours minimum.  
n = 45 devices, c = 0.  
High-temperature life (non-operating), t = 340 hours, TA = +200°C. n = 22, c = 0.  
10  
MIL-PRF-19500/355R  
4.4.2.3 Group B sample selection. Samples selected from group B inspection shall meet all of the following  
requirements:  
a. For JAN, JANTX, and JANTXV samples shall be selected randomly from a minimum of three wafers (or from  
each wafer in the lot) from each wafer lot. For JANS, samples shall be selected from each inspection lot.  
See MIL-PRF-19500.  
b. Shall be chosen from an inspection lot that has been submitted to and passed table I, subgroup 2,  
conformance inspection. When the final lead finish is solder or any plating prone to oxidation at high  
temperature, the samples for life test (subgroups B4 and B5 for JANS, and group B for JAN, JANTX, and  
JANTXV) may be pulled prior to the application of final lead finish.  
4.4.3 Group C inspection, Group C inspection shall be conducted in accordance with the conditions specified for  
subgroup testing in table E-VII of MIL-PRF-19500, and in 4.4.3.1 (JANS) and 4.4.3.2 (JAN, JANTX, and JANTXV)  
herein for group C testing. Electrical measurements (end-points) and delta requirements shall be in accordance with  
table I, subgroup 2 and 4.5.8 herein.  
4.4.3.1 Group C inspection, table E-VII (JANS) of MIL-PRF-19500.  
Subgroup Method Condition  
C2  
2036  
Test condition E, not applicable to surface mount.  
RθJA and RθJC only, as applicable (see 1.3) and 4.3.2.  
C5  
C6  
3131  
1026  
1,000 hours at VCB = 10 V dc; power shall be applied to achieve TJ = +150°C minimum and  
a minimum of PD = 75 percent of maximum rated PT as defined in 1.3 n = 45, c = 0. The  
sample size may be increased and the test time decreased as long as the devices are  
stressed for a total of 45,000 device hours minimum, and the actual time of test is at least  
340 hours.  
4.4.3.2 Group C inspection, table E-VII (JAN, JANTX, and JANTXV) of MIL-PRF-19500.  
Subgroup Method Condition  
C2  
2036  
3131  
Test condition E, not applicable to surface mount.  
C5  
C6  
RθJA and RθJC only, as applicable (see 1.3) and 4.3.2.  
Not applicable.  
4.4.3.3 Group C sample selection. Samples for subgroups in group C shall be chosen at random from any  
inspection lot containing the intended package type and lead finish procured to the same specification which is  
submitted to and passes table I tests herein for conformance inspection. When the final lead finish is solder or any  
plating prone to oxidation at high temperature, the samples for C6 life test may be pulled prior to the application of  
final lead finish. Testing of a subgroup using a single device type enclosed in the intended package type shall be  
considered as complying with the requirements for that subgroup.  
*
4.4.4 Group D inspection. Conformance inspection for hardness assured JANS and JANTXV types shall include  
the group D tests specified in table II herein. These tests shall be performed as required in accordance with  
MIL-PRF-19500 and method 1019 of MIL-STD-750 for total ionizing dose or method 1017 of MIL-STD-750 for  
neutron fluence, as applicable (see 6.2 herein) except group D, subgroup 2 may be performed separate from other  
subgroups. Alternate package options may also be substituted for the testing provided there is no adverse effect to  
the fluence profile.  
11  
MIL-PRF-19500/355R  
4.4.5 Group E inspection. Group E inspection shall be conducted in accordance with the conditions specified for  
subgroup testing in table E-IX of MIL-PRF-19500 and as specified in table III herein. Electrical measurements (end-  
points) shall be in accordance with table I, subgroup 2 herein; delta measurements shall be in accordance with the  
applicable steps of 4.5.8.  
4.5 Methods of inspection. Methods of inspection shall be as specified in the appropriate tables and as follows.  
4.5.1 Pulse measurements. Conditions for pulse measurement shall be as specified in section 4 of  
MIL-STD-750.  
4.5.2 Testing of units. All specified electrical tests, including end-point tests, shall be performed equally on both  
sections of the transistor types covered herein, except where the electrical characteristic being evaluated applies to  
the transistor as a device entity.  
4.5.3 Disposition of leads when testing characteristics of each section. During the measurement of the  
characteristics of each section, the leads of the section not under test shall be open-circuited.  
4.5.4 Forward-current-gain ratio. The value for the forward-current-gain ratio for each individual section of a dual  
unit shall be measured using method 3076 of MIL-STD-750. The forward-current-gain ratio shall be calculated by  
dividing one of the values by the other. If possible, this ratio shall be measured directly to improve accuracy.  
4.5.5 Base-emitter-voltage differential. The base-emitter-voltage differential shall be determined by connecting  
the emitters of the individual sections together, applying specified electrical test conditions to each individual section  
in accordance with method 3066 of MIL-STD-750, test condition B, and measuring the absolute value of the voltage  
between the bases of the individual sections of a dual unit.  
4.5.6 Base-emitter-voltage differential change with temperature. The value of the base-emitter-voltage differential  
shall be measured at the two specified temperatures in accordance with 4.5.5 except that the polarities of the  
differentials and identities of the individual sections shall be maintained. The absolute value of the algebraic  
difference between the values at the two temperature extremes shall be calculated. A mathematical formula for this  
parameter is:  
|(VBE1 (T1) - VBE2 (T1)) - (VBE1 (T2) - VBE2 (T2)) |  
4.5.7 Noise figure test. Noise figure shall be measured using Quan Tech Laboratories test set model no.  
2173C/2181, or equivalent. Conditions shall be as specified in table I.  
4.5.8 Delta requirements. Delta requirements shall be as specified below:  
Step  
1
Inspection  
MIL-STD-750  
Conditions  
Symbol  
Limit  
Method  
3036  
Min  
Max  
Collector-base  
cutoff current  
Bias condition D,  
VCB = 45 V dc  
100 percent of initial  
value or 1 nA dc,  
ICBO2  
whichever is greater.  
2
Forward current  
transfer ratio  
3076  
±25 percent change  
from initial reading.  
hFE3  
VCE = 5 V dc; IC = 1 mA dc;  
pulsed, see 4.5.1  
12  
MIL-PRF-19500/355R  
* TABLE I. Group A inspection.  
Inspection 1/  
MIL-STD-750  
Conditions  
Limit  
Unit  
Symbol  
Method  
2071  
Min  
Max  
Subgroup 1 2/  
Visual and mechanical  
examination 3/  
Solderability 3/ 4/  
2026  
1022  
n = 15 leads, c = 0  
Resistance to solvents  
3/ 4/ 5/  
n = 15 devices, c = 0  
Temp cycling 3/ 4/  
1051  
1071  
Test condition C, 25 cycles.  
n = 22 devices, c = 0  
Hermetic seal 4/ 6/  
Fine leak  
n = 22 devices, c = 0  
Gross leak  
Electrical measurements 4/  
Bond strength 3/ 4/  
Table I, subgroup 2  
2037  
Precondition  
TA = +250°C at t = 24 hours or  
TA = +300°C at t = 2 hours  
n = 11 wires, c = 0  
Decap internal visual (design  
verification) 4/  
2075  
3131  
N = 4 devices, c = 0  
Subgroup 2  
Thermal response  
See 4.3.2.  
°C/W  
Z
θJX  
Collector to base cutoff current  
Emitter to base cutoff current  
3036  
3061  
3011  
10  
10  
µA dc  
µA dc  
V dc  
Bias condition D, VCB = 70 V dc  
Bias condition D, VEB = 6 V dc  
ICBO1  
IEBO1  
Breakdown voltage, collector to  
emitter  
60  
Bias condition D; I = 10 mA dc;  
V
(BR)CEO  
C
pulsed (see 4.5.1)  
Collector to base cutoff current  
3036  
3041  
2
2
nA dc  
nA dc  
Bias condition D; V = 45 V dc  
I
I
CB  
CBO2  
CEO1  
Collector to emitter cutoff  
current  
Bias condition D; V = 5 V dc  
CE  
Emitter to base cutoff current  
Forward-current transfer ratio  
3061  
3076  
2
nA dc  
Bias condition D; V = 5 V dc  
I
EB  
EBO2  
V
= 5 V dc; I = 10 µA dc  
h
CE  
CE  
C
FE1  
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
60  
175  
240  
600  
Forward-current transfer ratio  
3076  
V
= 5 V dc; I = 100 µA dc  
h
C
FE2  
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
100  
235  
325  
800  
See footnotes at end of table.  
13  
MIL-PRF-19500/355R  
* TABLE I. Group A inspection - Continued.  
Inspection 1/  
MIL-STD-750  
Limit  
Unit  
Symbol  
Method  
3076  
Conditions  
Min  
Max  
600  
Subgroup 2 - Continued  
Forward-current transfer ratio  
V
= 5 V dc; I = 1 mA dc;  
h
FE3  
CE  
C
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2020U  
150  
300  
1,000  
Base-emitter saturation  
voltage  
3066  
Test condition A;  
0.5  
1.0  
V dc  
V dc  
I
= 1.0 mA dc; I = 100 µA dc;  
V
V
C
B
BE(sat)1  
CE(sat)1  
Collector-emitter saturation  
voltage  
3071  
3076  
I
= 1.0 mA dc; I = 100 µA dc;  
C
B
0.3  
1.1  
Forward-current  
transfer ratio (gain ratio)  
V
= 5 V dc, I = 100 µA dc  
hFE 21  
hFE 22  
CE  
C
*
0.9  
(see 4.5.4)  
Absolute value of  
base-emitter-voltage  
differential  
3066  
3066  
3066  
Test condition B; V = 5 V dc,  
CE  
5
3
5
mV dc  
mV dc  
mV dc  
|V  
- V  
|
BE1  
BE2  
1
I
= 10 µA dc (see 4.5.5)  
C
Absolute value of  
base-emitter-voltage  
differential  
Test condition B; V = 5 V dc,  
CE  
|V  
|V  
- V  
- V  
|
|
2
BE1  
BE1  
BE2  
BE2  
I
= 100 µA dc (see 4.5.5)  
C
Absolute value of  
base-emitter-voltage  
differential  
Test condition B; V = 5 V dc,  
CE  
3
I
= 1 mA dc (see 4.5.5)  
C
Subgroup 3  
High temperature operation  
T
= +150°C  
A
Base-emitter-voltage  
3066  
3036  
3076  
3066  
0.8  
2.5  
mV dc  
Test condition B; V = 5 V dc,  
|V  
-V  
TA |  
1
CE  
BE1  
BE2  
*
(nonsaturated) (absolute  
value of differential change  
with temperature) 6/  
I
= 100 µA dc  
C
T
= +125°C and +25°C  
A
(see 4.5.6)  
Collector to base cutoff  
current  
Bias condition D; V = 45 V dc  
CB  
µA dc  
I
CBO3  
Low temperature operation  
T
= -55°C  
A
Forward-current transfer  
ratio  
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
V
= 5 V dc; I = 10 µA dc  
h
FE4  
CE  
C
20  
50  
Base-emitter-voltage  
1
mV dc  
Test condition B; V = 5 V dc,  
|V  
-V  
T |  
BE2 A 2  
CE  
BE1  
*
(nonsaturated) (absolute  
value of differential change  
with temperature) 6/  
I
= 100 µA dc  
C
T
= +25°C and -55°C  
A
(see 4.5.6)  
See footnotes at end of table.  
14  
MIL-PRF-19500/355R  
*
TABLE I. Group A inspection - Continued.  
Inspection 1/  
Subgroup 4  
MIL-STD-750  
Limit  
Unit  
Symbol  
Method  
Conditions  
Min  
3
Max  
Small-signal short-circuit input  
impedance  
3201  
3211  
3216  
V
= 5 V dc; I = 1 mA dc;  
C
f = 1 kHz  
CE  
30  
1 x 10-3  
60  
kΩ  
h
ie  
Small-signal open-circuit  
reverse voltage transfer ratio  
V
= 5 V dc; I = 1 mA dc;  
CE  
C
hre  
f = 1 kHz  
Small-signal open-circuit  
output admittance  
V
= 5 V dc; I = 1 mA dc;  
CE  
C
µmhos  
h
oe  
f = 1 kHz  
Small-signal short-circuit  
forward current transfer ratio  
(magnitude hfe)  
3306  
V
= 5 V dc; I = 0.5 mA dc;  
CE  
C
3
20  
5
| h  
|
f = 20 MHz  
fe  
Open circuit output  
capacitance  
3236  
3246  
V
= 5 V dc; I = 0  
E
CB  
pF  
C
obo  
100 kHz f 1 MHz  
Noise figure  
V
= 5 V dc, I = 10 µA dc  
CE  
C
R = 10 k, (see 4.5.7)  
g
Test 1  
Test 2  
Test 3  
f = 100 Hz  
f = 1 kHz  
f = 10 kHz  
F1  
F2  
F3  
5
3
3
dB  
dB  
dB  
Subgroup 5  
3041  
20  
nA dc  
Bias condition D; V = 40 V dc  
I
CES  
Collector to emitter cutoff  
current  
CE  
Subgroups 6 and 7  
Not required  
1/ For sampling plan see MIL-PRF-19500.  
2/ For resubmission of failed test in subgroup 1 of table I, double the sample size of the failed test or sequence of  
tests. A failure in table I, subgroup 1 shall not require retest of the entire subgroup. Only the failed test shall  
be rerun upon submission.  
3/ Separate samples may be used.  
4/ Not required for JANS devices.  
5/ Not required for laser marked devices.  
6/ When using table I, subgroup 2 as electrical end-points, this test is only required for JANS end-points.  
15  
MIL-PRF-19500/355R  
* TABLE II. Group D inspection.  
Inspection 1/ 2/ 3/  
Subgroup 1 4/  
MIL-STD-750  
Conditions  
Limit  
Unit  
Method  
Symbol  
Min  
Max  
Neutron irradiation  
1017  
3036  
3061  
3011  
Neutron exposure VCES = 0 V  
Collector to base cutoff current  
Cutoff current, emitter to base  
20  
20  
µA dc  
µA dc  
V dc  
Bias condition D; V = 70 V dc  
I
I
CB  
CBO1  
Bias condition D; V = 6 V dc  
EB  
EBO1  
Breakdown voltage, collector to  
emitter  
60  
Bias condition D; I = 10 mA dc;  
V
(BR)CEO  
C
pulsed (see 4.5.1)  
Collector to base cutoff current  
Emitter to base cutoff current  
3036  
3061  
4
4
4
nA dc  
nA dc  
nA dc  
Bias condition D; V = 45 V dc  
I
I
I
CB  
CBO2  
CEO1  
EBO2  
Bias condition D; V = 5 V dc  
CE  
Emitter to base cutoff current  
Forward-current transfer ratio  
3061  
3076  
Bias condition D; V = 5 V dc  
EB  
[hFE1] 5/  
V
V
V
= 5 V dc; I = 10 µA dc  
CE  
CE  
CE  
C
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
[30]  
[87.5]  
240  
600  
Forward-current transfer ratio  
3076  
3076  
3066  
[hFE2] 5/  
= 5 V dc; I = 100 µA dc  
C
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
[50]  
[117.5]  
325  
800  
Forward-current transfer ratio  
= 5 V dc; I = 1 mA dc;  
[h ] 5/  
C
FE3  
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
[75]  
[150]  
600  
1,000  
Base-emitter saturation voltage  
Test condition A;  
0.50  
1.15  
V dc  
V dc  
I
= 1.0 mA dc; I = 100 µA dc;  
V
C
B
BE(sat)1  
Collector-emitter saturation  
voltage  
3071  
3076  
I
= 1.0 mA dc; I = 100 µA dc;  
C
B
0.35  
1.2  
V
CE(sat)1  
Forward-current  
V
= 5 V dc, I = 100 µA dc  
hFE 21  
hFE 22  
CE  
C
*
transfer ratio (gain ratio)  
0.8  
(see 4.5.4)  
Absolute value of  
base-emitter-voltage  
differential  
3066  
3066  
Test condition B; V = 5 V dc,  
CE  
5.8  
3.5  
mV dc  
mV dc  
|V  
- V  
|
|
BE1  
BE1  
BE2  
BE2  
1
I
= 10 µA dc (see 4.5.5)  
C
Absolute value of  
base-emitter-voltage differential  
Test condition B; V = 5 V dc,  
CE  
|V  
- V  
2
I
= 100 µA dc (see 4.5.5)  
C
See footnotes at end of table.  
16  
MIL-PRF-19500/355R  
* TABLE II. Group D inspection - Continued.  
Inspection 1/ 2/ 3/  
MIL-STD-750  
Limit  
Unit  
Method  
Conditions  
Symbol  
Min  
Max  
Subgroup 1 4/ - Continued.  
Absolute value of  
base-emitter-voltage differential  
3066  
3066  
Test condition B; V = 5 V dc,  
|V  
- V  
|
BE2 3  
CE  
BE1  
5.8  
mV dc  
mV dc  
I
= 1 mA dc (see 4.5.5)  
C
Base-emitter-voltage  
(nonsaturated) (absolute  
value of differential change  
with temperature)  
Test condition B; V = 5 V dc,  
CE  
0.92  
|V  
TA |  
-V  
BE1  
BE2  
BE2  
I
= 100 µA dc  
C
1
T
= +25°C and -55°C  
A
(see 4.5.6)  
Base-emitter-voltage  
(nonsaturated) (absolute  
value of differential change  
with temperature)  
3066  
Test condition B; V = 5 V dc,  
CE  
1.15  
mV dc  
|V  
T  
-V  
BE1  
I
= 100 µA dc  
C
|
A
2
T
= +125°C and +25°C  
A
(see 4.5.6)  
Subgroup 2  
Total dose irradiation  
1019  
3036  
Gamma exposure VCES = 40 V  
Collector to base cutoff current  
20  
20  
µA dc  
µA dc  
V dc  
Bias condition D; V = 70 V dc  
I
I
CB  
CBO1  
Cutoff current, emitter to base  
3061  
3011  
Bias condition D; V = 6 V dc  
EB  
EBO1  
Breakdown voltage, collector to  
emitter  
60  
Bias condition D; I = 10 mA dc;  
V
(BR)CEO  
C
pulsed (see 4.5.1)  
Collector to base cutoff current  
Emitter to base cutoff current  
3036  
3061  
4
4
4
nA dc  
nA dc  
nA dc  
Bias condition D; V = 45 V dc  
I
I
I
CB  
CBO2  
CEO1  
EBO2  
Bias condition D; V = 5 V dc  
CE  
Emitter to base cutoff current  
Forward-current transfer ratio  
3061  
3076  
Bias condition D; V = 5 V dc  
EB  
[hFE1] 5/  
V
V
V
= 5 V dc; I = 10 µA dc  
CE  
CE  
CE  
C
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
[30]  
[87.5]  
240  
600  
Forward-current transfer ratio  
3076  
3076  
[hFE2] 5/  
= 5 V dc; I = 100 µA dc  
C
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
[50]  
[117.5]  
325  
800  
Forward-current transfer ratio  
= 5 V dc; I = 1 mA dc;  
[h ] 5/  
FE3  
C
2N2919, 2N2919L, 2N2919U  
2N2920, 2N2920L, 2N2920U  
[75]  
[150]  
600  
1,000  
See footnotes at end of table.  
17  
MIL-PRF-19500/355R  
* TABLE II. Group D inspection - Continued.  
Inspection 1/ 2/ 3/  
MIL-STD-750  
Limit  
Unit  
Method  
Conditions  
Symbol  
Min  
Max  
1.15  
Subgroup 2 - Continued.  
Base-emitter saturation voltage  
3066  
Test condition A;  
0.50  
V dc  
V dc  
I
= 1.0 mA dc; I = 100 µA dc;  
V
V
C
B
BE(sat)1  
CE(sat)1  
Collector-emitter saturation  
voltage  
3071  
3076  
I
= 1.0 mA dc; I = 100 µA dc;  
C
B
0.35  
1.2  
Forward-current  
transfer ratio (gain ratio)  
V
= 5 V dc, I = 100 µA dc  
hFE 21  
hFE 22  
*
CE  
C
0.8  
(see 4.5.4)  
Absolute value of  
base-emitter-voltage  
differential  
3066  
Test condition B; V = 5 V dc,  
CE  
5.8  
mV dc  
|V  
- V  
|
1
BE1  
BE2  
I
= 10 µA dc (see 4.5.5)  
C
Absolute value of  
base-emitter-voltage differential  
3066  
3066  
3066  
Test condition B; V = 5 V dc,  
CE  
3.5  
5.8  
mV dc  
mV dc  
mV dc  
|V  
|V  
- V  
- V  
|
|
2
BE1  
BE1  
BE2  
BE2  
I
= 100 µA dc (see 4.5.5)  
C
Absolute value of  
base-emitter-voltage differential  
Test condition B; V = 5 V dc,  
CE  
3
I
= 1 mA dc (see 4.5.5)  
C
Base-emitter-voltage  
(nonsaturated) (absolute  
value of differential change  
with temperature)  
Test condition B; V = 5 V dc,  
CE  
0.92  
|V  
TA |  
-V  
BE1  
BE2  
BE2  
I
= 100 µA dc  
C
1
T
= +25°C and -55°C  
A
(see 4.5.6)  
Base-emitter-voltage  
(nonsaturated) (absolute  
value of differential change  
with temperature)  
3066  
Test condition B; V = 5 V dc,  
CE  
1.15  
mV dc  
|V  
-V  
BE1  
I
= 100 µA dc  
C
T  
|
2
A
T
= +125°C and +25°C  
A
(see 4.5.6)  
1/ Tests to be performed on all devices receiving radiation exposure.  
2/ For sampling plan, see MIL-PRF-19500.  
3/ Electrical characteristics apply to the corresponding L and U suffix versions unless otherwise noted.  
4/ See 6.2.e herein.  
5/ See method 1019 of MIL-STD-750 for how to determine [hFR] by first calculating the delta (1/hFE) from the pre- and  
Post-radiation hFE. Notice the [hFE] is not the same as hFE and cannot be measured directly. The [hFE] value  
can never exceed the pre-radiation minimum hFE that it is based upon.  
18  
MIL-PRF-19500/355R  
TABLE III. Group E inspection (all quality levels) - for qualification or re-qualification only.  
MIL-STD-750  
Conditions  
Qualification  
Inspection  
Method  
Subgroup 1  
12 devices  
c = 0  
Temperature cycling  
(air to air)  
1051  
1071  
Test condition C, 500 cycles.  
Hermetic seal  
Fine leak  
Gross leak  
Electrical measurements  
See table I, subgroup 2 and 4.5.8 herein.  
Subgroup 2  
45 devices  
c = 0  
Intermittent life  
1037  
Intermittent operation life: VCB = 10 V dc, 6,000  
cycles, adjust device current, or power, to achieve a  
minimum TJ of +100°C.  
Electrical measurements  
See table I, subgroup 2 and 4.5.8 herein.  
Subgroup 4  
Sample size  
N/A  
Thermal response curves  
See 4.2.1.1.  
Subgroup 5  
Not applicable  
Subgroup 6  
Electrostatic discharge  
(ESD)  
1020  
1033  
Subgroup 8  
45 devices  
c = 0  
Reverse stability  
Condition B.  
19  
MIL-PRF-19500/355R  
Maximum Thermal Impedance  
Calculated Thermal Impedance per Side Reflecting True Peak Tj  
1000  
100  
10  
0.00001  
0.0001  
0.001  
0.01  
0.1  
1
10  
100  
1000  
10000  
Time (s)  
FIGURE 5. For each side: Thermal resistance = 875°C/W, Pt = 200 mW.  
20  
MIL-PRF-19500/355R  
Maximum Thermal Impedance  
Calculated Thermal Impedance Both Sides Reflecting True Peak Tj  
1000  
100  
10  
0.00001  
0.0001  
0.001  
0.01  
0.1  
1
10  
100  
1000  
Time (s)  
FIGURE 6. Both sides: Thermal resistance = 500°C/W, Pt = 350 mW.  
21  
MIL-PRF-19500/355R  
5. PACKAGING  
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or  
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these  
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging  
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or  
Defense Agency, or within the Military Service’s system commands. Packaging data retrieval is available from the  
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting  
the responsible packaging activity.  
6. NOTES  
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.  
The notes specified in MIL-PRF-19500 are applicable to this specification.)  
6.1 Intended use. Semiconductors conforming to this specification are intended for original equipment design  
applications and logistic support of existing equipment.  
6.2 Acquisition requirements. Acquisition documents should specify the following:  
a. Title, number, and date of this specification.  
b. Packaging requirements (see 5.1).  
c. Lead finish (see 3.4.1).  
d. Product assurance level and type designator.  
e. For acquisition of RHA designated devices, table II, subgroup 1 testing of group D herein is optional.  
If subgroup 1 is desired, it should be specified in the contract.  
*
6.3 Qualification. With respect to products requiring qualification, awards will be made only for products which  
are, at the time of award of contract, qualified for inclusion in Qualified Manufacturers List (QML 19500) whether or  
not such products have actually been so listed by that date. The attention of the contractors is called to these  
requirements, and manufacturers are urged to arrange to have the products that they propose to offer to the Federal  
Government tested for qualification in order that they may be eligible to be awarded contracts or orders for the  
products covered by this specification. Information pertaining to qualification of products may be obtained from DLA  
Land and Maritime, Columbus, ATTN: VQE, P.O. Box 3990, Columbus, OH 43218-3990 or e-mail  
vqe.chief@dla.mil. An online listing of products qualified to this specification may be found in the Qualified Products  
Database (QPD) at https://assist.dla.mil .  
6.4 Suppliers of JANHC die. The qualified JANHC suppliers with the applicable letter version (example  
JANHCA2N2919) will be identified on the QML.  
JANHC and JANKC ordering information  
PIN  
Manufacturer  
43611  
34156  
JANHCA2N2919  
JANHCB2N2919, JANHCB2N2920  
2N2919  
JANKCA2N2919  
JANKCB2N2919, JANKCB2N2920  
22  
MIL-PRF-19500/355R  
6.5 Changes from previous issue. The margins of this specification are marked with asterisks to indicate where  
changes from the previous issue were made. This was done as a convenience only and the Government assumes  
no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the  
requirements of this document based on the entire content irrespective of the marginal notations and relationship to  
the last previous issue.  
Custodians:  
Army - CR  
Navy - EC  
Air Force - 85  
NASA - NA  
DLA - CC  
Preparing activity:  
DLA - CC  
(Project 5961-2012-112)  
Review activities:  
Army - AR, MI, SM  
Navy - AS, MC  
Air Force - 19, 99  
*
NOTE: The activities listed above were interested in this document as of the date of this document. Since  
organizations and responsibilities can change, you should verify the currency of the information above using the  
ASSIST Online database at https://assist.dla.mil .  
23  

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