JANTXV1N939UR-1 [CDI-DIODE]

DIODE 9 V, SILICON, VOLTAGE REFERENCE DIODE, DO-213AA, HERMETIC SEALED, GLASS PACKAGE-2, Voltage Reference Diode;
JANTXV1N939UR-1
型号: JANTXV1N939UR-1
厂家: COMPENSATED DEUICES INCORPORATED    COMPENSATED DEUICES INCORPORATED
描述:

DIODE 9 V, SILICON, VOLTAGE REFERENCE DIODE, DO-213AA, HERMETIC SEALED, GLASS PACKAGE-2, Voltage Reference Diode

二极管
文件: 总15页 (文件大小:494K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
The documentation and process conversion  
measures necessary to comply with this revision  
shall be completed by 1 October 2004.  
INCH-POUND  
MIL-PRF-19500/156M  
1 July 2004  
SUPERSEDING  
MIL-PRF-19500/156L  
18 September 2003  
* PERFORMANCE SPECIFICATION SHEET  
SEMICONDUCTOR DEVICE, DIODE, SILICON, LOW LEVEL VOLTAGE-REFERENCE  
TEMPERATURE COMPENSATED, TYPES 1N935B-1, 1N937B-1, 1N938B-1, 1N939B-1,  
AND 1N940B-1, 1N935BUR-1, 1N937BUR-1, 1N938BUR-1, 1N939BUR-1, AND 1N940BUR-1,  
JAN, JANTX, JANTXV, AND JANS, RADIATION HARDENED (TOTAL DOSE ONLY)  
TYPES JANTXVM, D, L, R, F, G, H, JANSM, D, L, R, F, G, H  
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 9.0 volts ±5 percent, silicon, low bias  
current, voltage-reference diodes. Four levels of product assurance are provided for each encapsulated device type  
as specified in MIL-PRF-19500. Seven levels of radiation hardened (total dose only) product assurance are provided  
for each encapsulated device type as specified in MIL-PRF-19500.  
1.2 Physical dimensions. See figure 1 (DO-7 and DO-35) and figure 2 (DO-213AA).  
1.3 Maximum ratings. (Unless otherwise specified TA = +25°C).  
PT  
TSTG and T  
IZM (1)  
Power derating  
above TA = +25°C  
J
mW  
500  
mA dc  
50  
°C  
mW/°C  
3.33  
-65 to +175  
(1) To guarantee voltage temperature stability, it is necessary to maintain an IZ of 7.5mA dc.  
* Comments, suggestions, or questions on this document should be addressed to Defense Supply Center,  
Columbus, ATTN: DSCC-VAC, P.O. Box 3990, Columbus, OH 43216-5000, or emailed to  
Semiconductor@dscc.dla.mil . Since contact information can change, you may want to verify the currency of  
this address information using the ASSIST Online database at http://www.dodssp.daps.mil.  
AMSC N/A  
FSC 5961  
MIL-PRF-19500/156M  
1.4 Primary electrical characteristics. Unless otherwise specified, primary electrical characteristics at T =  
+25°C.  
IR  
A
ZZ  
VZ  
VZ  
Type (1)  
(voltage - temperature  
stability)  
VR = 6.0 V  
IZ = 7.5 mA dc  
IZ = 7.5 mA dc  
Min  
volts  
8.55  
8.55  
8.55  
8.55  
8.55  
Max  
mV dc  
184  
37  
ohms  
20  
volts  
9.45  
9.45  
9.45  
9.45  
9.45  
µA  
1N935B-1, 1N935BUR-1  
1N937B-1, 1N937BUR-1  
1N938B-1, 1N938BUR-1  
1N939B-1, 1N939BUR-1  
1N940B-1, 1N940BUR-1  
10.0  
10.0  
10.0  
10.0  
10.0  
20  
19  
20  
9
3.7  
20  
20  
(1) To guarantee voltage temperature stability, it is necessary to maintain the proper IZ = 7.5 mA dc.  
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 Semiconductor Devices, General Specification for.  
DEPARTMENT OF DEFENSE STANDARDS  
MIL-STD-750 Test Methods for Semiconductor Devices.  
-
-
(Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or  
http://www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D,  
Philadelphia, PA 19111-5094.)  
2.4 Order of precedence. 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-19500/156M  
Dimensions  
Inches Millimeters  
Symbol  
Notes  
Min  
Max  
.107  
Min  
1.52  
3.05  
0.46  
25.40  
Max  
2.72  
7.62  
0.58  
38.10  
1.27  
BD  
BL  
LD  
LL  
.060  
.120  
3
3
.300  
.018  
.023  
1.000  
1.500  
0.050  
LL1  
4
NOTES:  
1. Dimensions are in inches.  
2. Millimeters are given for general information only.  
3. Package contour optional within BD and length BL. Heat slugs, if any, shall be included within  
this cylinder but shall not be subject to minimum limit of BD.  
4. Within this zone, lead diameter may vary to allow for lead finishes and irregularities, other than  
heat slugs.  
5. In accordance with ASME Y14.5M, diameters are equivalent to φx symbology.  
FIGURE 1. Physical dimensions 1N935B-1, 1N937B-1 through 1N940B-1 (DO-7 and DO-35).  
3
MIL-PRF-19500/156M  
Dimensions  
Millimeters  
Symbol  
Inches  
Min  
Max  
.067  
.022  
.146  
Min  
1.60  
0.41  
3.30  
Max  
1.70  
0.56  
3.70  
BD  
.063  
.016  
.130  
ECT  
BL  
S
.001 Min  
0.03 Min  
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 1N935BUR-1, 1N937BUR-1 through 1N940BUR-1 (DO-213AA).  
4
MIL-PRF-19500/156M  
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. The abbreviations, symbols, and definitions used herein shall be as  
specified in MIL-PRF-19500.  
3.4 Interface and physical dimensions. The interface and physical dimensions shall be as specified in  
MIL-PRF-19500 and figures 1 and 2 herein.  
* 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 Diode construction. These devices shall be constructed in a manner and using material which enable the  
diodes to meet the applicable requirements of MIL-PRF-19500 and this document.  
3.5.1 Dash-one construction. Shall be as specified in MIL-PRF-19500.  
3.5.2 JANS construction. Construction shall be dash-one, category I or II metallurgical bond in accordance with  
PRF-19500.  
MIL-  
3.6 Marking. Marking shall be in accordance with MIL-PRF-19500.  
3.6.1 Marking of "UR" version devices. For "UR" version devices only, all marking (except polarity) may be  
from the body, but shall be retained on the initial container.  
omitted  
3.7 Electrical performance characteristics. Unless otherwise specified herein, the electrical performance  
characteristics are as specified in 1.3, 1.4 and table I herein.  
Electrical test requirements. The electrical test requirements shall be the subgroups specified in 4.4.2 and  
3.8  
4.4.3.  
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).  
* 4.1.1 Sampling inspection. Sampling inspection shall be in accordance with MIL-PRF-19500 and as specified  
herein, except that lot accumulation period shall be 3 months in lieu of 6 weeks.  
5
MIL-PRF-19500/156M  
4.2 Qualification inspection. Qualification inspection shall be in accordance with MIL-PRF-19500 and as specified  
herein.  
4.2.1 Group E inspection. Group E inspection shall be conducted in accordance with MIL-PRF-19500 and 4.4.5  
herein.  
4.2.2 Radiation hardened devices. See MIL-PRF-19500 and 4.4.4 herein.  
* 4.3 Screening (JANS, JANTXV, and JANTX levels only). Screening shall be in accordance with table IV of  
MIL-PRF-19500, appendix E 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.  
Screen (see  
appendix E,  
JANS level  
JANTXV and JANTX level  
table IV of  
MIL-PRF-19500)  
1a  
1b  
2
3a  
3b  
3c  
4
5
6
7a  
7b  
8
Required  
Not required  
Required  
Required (JANTXV only)  
Not required  
Not required  
Required  
Required  
Not applicable  
Not applicable  
Not applicable  
Not applicable  
Not applicable  
Not applicable  
Optional  
Not applicable  
Not applicable  
Not applicable  
Not applicable  
Not applicable  
Not applicable  
Optional  
Required  
Not required  
9
10  
11  
Not applicable  
Not applicable  
Required VZ, ZZ  
Not applicable  
Not applicable  
Required VZ, ZZ  
12  
13  
Required see 4.3.1  
Required see 4.3.1  
Required  
Required  
Subgroups 2 and 3 of table I herein; ZZ ±15  
Subgroup 2 of table I herein; ZZ ±15 percent of  
percent of initial reading. At TA = +25°C ±2°C,  
initial reading. TA = +25°C ±2°C, VZ ±0.004 V dc  
VZ ±0.004 V dc from initial value for 1N935B-  
from initial value for 1N935B-1, 1N935BUR-1,  
1N937B-1, and 1N937BUR-1.  
1, 1N935BUR-1, 1N937B-1, and 1N937BUR-1.  
VZ ±0.003 V dc from initial value for 1N938B-  
VZ ±0.003 V dc from initial value for 1N938B-1,  
1N938BUR-1, 1N939B-1, and 1N939BUR-1. VZ ≤  
1, 1N938BUR-1, 1N939B-1, and 1N939BUR-1.  
VZ ±0.002 V dc from initial value for 1N940B-  
±0.002 V dc from initial value for 1N940B-1,  
1N940BUR-1.  
1, 1N940BUR-1.  
Not applicable  
Required (1) (2)  
Required  
14a  
14b  
15  
Not applicable  
Required (1) (2)  
Not required  
16  
Required  
Not required  
(1) See MIL-PRF-19500.  
(2) For clear glass diodes, the hermetic seal (gross leak) may be performed at any time after temperature cycling.  
6
MIL-PRF-19500/156M  
(3)  
4.3.1 Power burn-in conditions. Power burn-in conditions are as follows: IZ = 7.5 mA dc, ±0.75 mA dc,  
TA = +150°C, +5°C, -0°C.  
4.4 Conformance inspection. Conformance inspection shall be in accordance with MIL-PRF-19500.  
4.4.1 Group A inspection. Group A inspection shall be conducted in accordance with appendix E, table V of  
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 VIa (JANS) and table VIb (JAN, JANTX and JANTXV) of MIL-PRF-19500. Electrical  
measurements (end-points) shall be in accordance with the applicable steps of table I, subgroup 2 herein.  
4.4.2.1 Group B inspection, table VIa (JANS) of MIL-PRF-19500. For purposes of JANS inspection, a single  
device type shall be defined as devices from a single wafer lot (for each die type used in the construction). The  
conformance inspection sample shall be selected from the part category with the lowest VZ rating in the inspection  
lot.  
Subgroup  
B1  
Method  
2066  
2026  
1022  
1056  
4066  
1071  
2075  
1037  
Conditions  
As specified.  
B2  
As specified.  
As specified.  
B3  
Test condition A, 25 cycles.  
Not applicable.  
Test condition E.  
As specified.  
B4  
IZ = 25 mA dc at T = room ambient; ton = toff = 30 seconds minimum for 4,000  
cycles. Forced airAcooling allowed during off cycle.  
B5  
B6  
1027  
IZM = 50 mA dc for 96 hours. TA = +75°C, adjust TA to achieve TJ = +200°C  
minimum.  
Not applicable.  
7
MIL-PRF-19500/156M  
* 4.4.2.2 Group B inspection, table VIb (JAN, JANTX and JANTXV) of MIL-PRF-19500.  
Subgroup  
B1  
Method  
2026  
1022  
1056  
4066  
1071  
1027  
2075  
Conditions  
As specified.  
As specified.  
B2  
Test condition A, 25 cycles.  
Not applicable.  
Test condition E.  
See 4.3.1.  
B3  
B4  
B5  
B6  
As specified.  
Not applicable.  
As specified.  
1032  
4.4.3 Group C inspection. Group C inspection shall be conducted in accordance with the conditions specified for  
subgroup testing in appendix E, table VII of MIL-PRF-19500. Electrical measurements (end-points) requirements  
shall be in accordance with the applicable steps of table I, subgroup 2 herein.  
* 4.4.3.1 Group C inspection, appendix E table VII of MIL-PRF-19500.  
Subgroup  
C1  
Method  
2066  
Conditions  
As specified.  
C2  
1056  
Test condition A, 25 cycles.  
2036  
Tension: Test condition A; 4 pounds weight, t = 15 ±3 seconds;  
Lead fatigue: Test condition E (lead fatigue and tension tests are not  
applicable to surface mount "UR" version devices).  
1071  
1021  
Test condition E.  
Omit initial conditioning.  
Not applicable.  
C3  
C4  
C5  
C6  
1041  
1026  
As specified.  
Not applicable.  
IZ = 7.5 mA dc, TA = +100°C. (see 4.5.2).  
C7  
Not applicable.  
8
MIL-PRF-19500/156M  
* 4.4.4 Group D inspection. Group D inspection shall be conducted in accordance with appendix E, table VIII of  
MIL-  
PRF-19500. Submitted lots for group D sample inspection must be constructed using one homogeneous wafer lot for  
the zener and one wafer lot for the compensating die, as also described in the submitted DSCC Design and  
Construction form 36D (see table II herein).  
4.4.5 Group E inspection. Group E inspection shall be conducted in accordance with the conditions specified for  
subgroup tests in appendix E, table IX of MIL-PRF-19500 and table III herein.  
4.5 Methods of inspection. Methods of inspection shall be as specified in the appropriate tables and as follows.  
4.5.1 Voltage-temperature stability. The breakdown voltage of each diode type shall be measured and recorded  
each of the specified temperatures. The lowest measured voltage shall be subtracted from the highest measured  
voltage for each diode. The difference value obtained shall not exceed the specified VZ per diode type.  
at  
4.5.2 Reference voltage time stability. The breakdown voltage shall be measured prior to life testing, at 340  
hours,  
and at the conclusion of the life test as shown in table IV. The 340-hour reading shall be compared with the 0-hour  
reading and the 1,000-hour reading compared with the 340-hour reading. The change in breakdown voltage shall not  
exceed the limits specified. The test temperature for breakdown voltage shall be the same as the specified ambient  
life test temperature (see table IV herein).  
4.5.3 Reference voltage. The test current shall be applied until thermal equilibrium is attained (15 seconds  
minimum) prior to reading the reference voltage. For this test, the diode shall be suspended by its leads with  
mounting clips whose inside edge is located between .375 inch (9.53 mm) and .500 inch (12.70 mm) inch from the  
body and the mounting clips shall be maintained at the specified temperature. This measurement may be performed  
after a shorter time following application of the test current than that which provides thermal equilibrium if correlation  
to stabilized readings can be established to the satisfaction of the Government.  
9
MIL-PRF-19500/156M  
TABLE I. Group A inspection.  
Inspection 1/  
Subgroup 1  
MIL-STD-750  
Conditions  
Symbol  
Limits  
Max  
Unit  
Method  
2071  
Min  
Visual and mechanical  
examination  
Subgroup 2  
Reference voltage  
4022  
4051  
VZ  
ZZ  
8.55  
9.45  
20.0  
V dc  
IZ = 7.5 ±0.01 mA dc (see 4.5.3)  
Small-signal  
ohms  
IZ = 7.5 ±0.1 mA dc,  
Isig = 0.75 mA ac  
breakdown impedance  
Subgroup 3  
Voltage-temperature  
stability (see 4.5.1  
and 4.5.3)  
IZ = 7.5 ±0.01 mA dc,  
TA = -55°C, 0°C,  
+25°C, +75°C, +150°C ±2°C  
VZ  
1N935B-1, 1N935BUR-1  
1N937B-1, 1N937BUR-1  
1N938B-1, 1N938BUR-1  
1N939B-1, 1N939BUR-1  
1N940B-1, 1N940BUR-1  
Subgroups 4, 5, and 6  
Not applicable  
184.0  
37.0  
19.0  
9.0  
mV dc  
mV dc  
mV dc  
mV dc  
mV dc  
3.7  
Subgroup 7  
Reverse current  
leakage  
4016  
DC method; VR = 6.0 V dc  
IR  
10.0  
µA  
1/ For sampling plan, see MIL-PRF-19500.  
10  
MIL-PRF-19500/156M  
TABLE II. Group D inspection.  
Inspection  
1/ 2/  
MIL-STD-750  
Symbol JANTXV and  
JANTXV and  
JANS  
Unit  
VZ1  
Pre-to post-  
JANS  
Pre-  
Post-  
irradiation  
limits  
irradiation  
limits  
Method  
Conditions  
M, D, L, R,  
F, G, and H  
M, D, L, R,  
F, G, and H  
irradiation  
change  
Min  
Max  
Min  
Max  
Min  
Max  
Subgroup 1  
Not applicable  
Subgroup 2  
Steady-state  
total  
1019  
IZ = 7.5  
±0.01 mA dc,  
dose irradiation  
condition A  
Reference  
voltage  
4022  
4051  
IZ = 7.5  
±0.01 mA dc  
VZ  
ZZ  
8.55  
9.45  
20  
8.55  
9.45  
V dc  
ohms  
µA dc  
(see 4.5.3)  
Small-signal  
breakdown  
impedance  
IZ = 7.5  
±0.01 mA dc,  
20  
Reverse current  
leakage  
4016  
4022  
DC method,  
I
10.0  
10.0  
R
VR = 6.0 V dc  
Voltage stability  
(see 4.5.1)  
IZ = 7.5  
VZ  
±0.01 mA dc,  
TA = +25°C  
±2°C  
1N935B-1,  
±4.0  
±3.5  
±3.0  
±2.5  
±1.5  
mV  
mV  
mV  
mV  
mV  
1N935BUR-1  
1N937B-1,  
1N937BUR-1  
1N938B-1,  
1N938BUR-1  
1N939B-1,  
1N939BUR-1  
1N940B-1,  
1N940BUR-1  
1/ For sampling plan, see MIL-PRF-19500.  
2/ Group D qualification may be performed anytime prior to lot formation.  
11  
MIL-PRF-19500/156M  
* TABLE III. Group E inspection qualification and requalification (all product assurance levels).  
Qualification conformance  
Inspection  
MIL-STD-750  
Conditions  
inspection (sampling plan)  
Method  
1051  
Subgroup 1  
Temperature cycling  
Electrical measurements  
Subgroup 2  
22 devices, c = 0  
500 cycles.  
See table I, subgroup 2.  
22 devices, c = 0  
3 devices, c = 0  
Steady-state operation life  
1038  
2101  
Condition B, 1,000 hours (see 4.3.1).  
See table I, subgroup 2 herein.  
Electrical measurements  
Subgroup 3  
Decap analysis  
Cross section and scribe and break.  
Separate samples shall be used for each  
test.  
Subgroups 4, 5, 6, and 7  
Not applicable  
Subgroup 8  
45 devices  
Resistance to glass  
cracking  
1057  
Step stress to destruction by increasing  
cycles or up to a maximum of 25 cycles.  
12  
MIL-PRF-19500/156M  
TABLE IV. Reference voltage time stability.  
Inspection  
MIL-STD-750  
Conditions  
Symbol  
Limits  
Max  
Unit  
Min  
Reference-voltage time  
stability  
TA = +100°C ±2°C (see 4.5.2 and  
4.5.3). IZ = 7.5 ±0.01 mA dc  
VZ  
1N935B-1, 1N935BUR-1  
1N937B-1, 1N937BUR-1  
1N938B-1, 1N938BUR-1  
1N939B-1, 1N939BUR-1  
1N940B-1, 1N940BUR-1  
(0 to 340 hours)  
7
7
6
5
3
mV dc  
mV dc  
mV dc  
mV dc  
mV dc  
1N935B-1, 1N935BUR-1  
1N937B-1, 1N937BUR-1  
1N938B-1, 1N938BUR-1  
1N939B-1, 1N939BUR-1  
1N940B-1, 1N940BUR-1  
(340 to 1,000 hours)  
4
4
3
3
1
mV dc  
mV dc  
mV dc  
mV dc  
mV dc  
13  
MIL-PRF-19500/156M  
5. PACKAGING  
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or  
*
order (see 6.2). When actual 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.)  
6.1 Intended use. The notes specified in MIL-PRF-19500 are applicable to this specification.  
*
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.  
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  
Defense Supply Center, Columbus, ATTN: DSCC/VQE, P.O. Box 3990, Columbus, OH 43216-5000 or e-mail  
vqe.chief@dla.mil.  
6.4 Substitution of radiation hardened devices. See MIL-PRF-19500.  
6.5 Substitution of VZ devices. Device types within this series with higher type numbers (lower VZ) are a direct  
one-way substitution for lower type numbers (higher VZ).  
6.6 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.  
14  
MIL-PRF-19500/156M  
Custodians:  
Army - CR  
Navy - EC  
Air Force - 11  
NASA - NA  
DLA - CC  
Preparing activity:  
DLA - CC  
(Project 5961-2883)  
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 http://www.dodssp.daps.mil .  
15  

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