1、NASA/TP2003212242EEE-INST-002: Instructions for EEE Parts Selection, Screening, Qualification, and Derating Prepared by: Dr. Kusum Sahu Reviewed by: Dr. Henning Leidecker Approved by: Darryl LakinsApril 2008, Incorporated Addendum 1National Aeronautics and Space Administration Goddard Space Flight C
2、enter Greenbelt, Maryland 20771 May 2003 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ENCLOSURE 1: Addendum 1 for GSFC EEE-INST-002 Connector Section C2, General Section, added new paragraphs 5), 6), and 7) on Page 2. 5) Prohibited connectors. The
3、 following connectors are prohibited for Level 1 and Level 2 applications. The following connectors are not recommended for Level 3 applications. The screening and qualification tables that follow do not apply to connectors listed as prohibited. a. CompactPCI connectors and 2.0mm Hard Metric connect
4、ors, as well as other connector designs (e.g. Eurocard, VME) with flat bifurcated “tuning fork” type female contacts. b. Other connector contact systems having two (2) points of contact engagement, or less, that do not utilize a military style hood “clamping” mechanism to support female contact enga
5、gement tines. c. Connectors with compliant pin “press fit” terminations to flight boards. d. MIL-DTL-55302/ 131 through 134 Eurocard type PWB connectors e. MIL-DTL-55302/ 157 i.e., a grade 1 part is consistent with reliability level 1. Levels of part reliability confidence decrease by reliability le
6、vel, with level 1 being the highest reliability and level 3 the lowest. A reliability level 1 part has the highest level of manufacturing control and testing per military or DSCC specifications. Level 2 parts have reduced manufacturing control and testing. Level 3 Parts have no guaranteed reliabilit
7、y controls in the manufacturing process and no standardized testing requirements. The reliability of level 3 parts can vary significantly with each manufacturer, part type and LDC due to unreported and frequent changes in design, construction and materials. GSFC projects and contractors shall incorp
8、orate this guideline into their Project EEE Parts Program. 3.0 DEFINITIONS Screening. Screening tests are intended to remove nonconforming parts (parts with random defects that are likely to result in early failures, known as infant mortality) from an otherwise acceptable lot and thus increase confi
9、dence in the reliability of the parts selected for use. Qualification. Qualification testing consists of mechanical, electrical, and environmental inspections, and is intended to verify that materials, design, performance, and long-term reliability of the part are consistent with the specification a
10、nd intended application, and to assure that manufacturer processes are consistent from lot to lot. Derating. Derating is the reduction of electrical and thermal stresses applied to a part during normal operation in order to decrease the degradation rate and prolong its expected life. Provided by IHS
11、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Source Control Drawing (SCD) - Provides an engineering description (including configuration, part number, marking, reliability, environmental, functional / performance characteristics), qualification requirements and
12、acceptance criteria for commercial items or vendor developed items procurable from a specialized segment of industry that provides for application critical or unique characteristics. Vendor Item Control Drawing (Formerly known as Specification Control Drawing) - Provides an engineering description (
13、including configuration, performance, reliability, environmental, functional characteristics) and acceptance criteria for commercial or vendor developed items that are procurable from a specialized segment of industry. The drawing is used to provide an administrative control number, but the item is
14、marked with the vendors part number. NOTE: For the purposes of this EEE Part Instruction document, in the Screening and Qualification tables, the term SCD is used to convey any user developed EEE part procurement control document whether Source Control Drawing or Vendor Item Control Drawing, regardl
15、ess of qualification requirement. 4.0 REFERENCES The following documents, of the issue in effect when this document is used, form a part of this document to the extent specified herein. GSFC Documents GPG 1310.1 Customer Agreements GPG 1440.1 Control of Quality Records GPG 7120.2 Project Management
16、S-311-M-70 Specifications for Destructive Physical Analysis (DPA) NASA Documents NPD 8730.2 NASA Parts Policy Military Standards MIL- STD-883 Test Method Standard, Microcircuits MIL- STD-750 Test Methods for Semiconductor Devices MIL-STD-202 Test Method Standard, Electronic and Electrical Component
17、Parts MIL-STD-1580 Test Method Standard, Destructive Physical Analysis for EEE Parts Industry Standards ASTM E595 Standard Test Methods for Total Mass Loss and Collected Volatile Condensable Materials From Outgassing in a Vacuum Environment 5.0 IMPLEMENTATION The instructions in this document shall
18、be implemented when specified in GSFC space projects Statements of Work (SOWs), Mission Assurance Requirements (MARs), or their equivalents. Hereafter, any use of the word “requirement” assumes compliance to this document is mandatory. Section 1 EEE-INST-002 Instructions for All Part Categories Page
19、 2 of 12 5/03 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-5.1 Part Type Categories The instructions for each part type category have been developed by the parts specialists with experience in working on a large number of GSFC projects. These inst
20、ructions and the Federal Source Code (FSC) are specified in the following sections of this document: Part Type Document Section Parts Specialists FSC General Instructions for All Part Categories 1 Dr. Kusum Sahu kusum.k.sahunasa.gov N/A Capacitors C1 Tom Duffytduffypop300.gsfc.nasa.gov 5910 Connecto
21、rs and Contacts C2 Terry King tkingpop300.gsfc.nasa.gov 5935 Crystals C3 Gerard F. Kiernan 5955 Crystal Oscillators C4 Gerard F. Kiernan 5955 Fiber Optics, Passive Dr. Tracee Jamison tracee.l.jamisonnasa.govMarcellus Proctor marcellus.a.proctornasa.gov 60GP Filters F2 Tom Duffytduffypop300.gsfc.na
22、sa.gov 5915 Fuses F3 Thom Perrytperrypop300.gsfc.nasa.gov 5920 Heaters H1 Tom Duffytduffypop300.gsfc.nasa.gov 4520 Magnetics M1 Gerard F. Kiernan 5950 Microcircuits, Hybrid M2 Ashok Sharma ashok.k.sharmanasa.gov 5962 Microcircuits, Monolithic M3 Susan Ritter ritterspop500.gsfc.nasa.gov 5962 Microci
23、rcuits, Plastic Encapsulated (PEMs) M4ateverovpop300.gsfc.nasa.gov 5962 Relays, Electromagnetic R1 Thom Perry tperrypop300.gsfc.nasa.gov 5945 Resistors R2 Thom Perrytperrypop300.gsfc.nasa.gov 5905 Semiconductor Devices, Discrete S1 Dennis Krus dkruspop300.gsfc.nasa.gov 5961 Switches S2 Terry Kingtki
24、ngpop300.gsfc.nasa.gov 5930 Thermistors T1 Thom Perrytperrypop300.gsfc.nasa.gov 5905 Wire and Cable W1 Terry King tkingpop300.gsfc.nasa.gov 6145 Section 1 EEE-INST-002 Instructions for All Part Categories Page 3 of 12 5/03 Dr. Alexander TeverovskyProvided by IHSNot for ResaleNo reproduction or netwo
25、rking permitted without license from IHS-,-,-Section 1 EEE-INST-002 Instructions for All Part Categories Page 4 of 12 5/03 5.2 Other Part Types Part types that do not fall into one of the preceding categories listed in paragraph 5.1 shall be reviewed on a case-by-case basis using the closest NASA, D
26、SCC or government controlled specification as a baseline. The review shall ensure that parts meet the reliability requirements of its intended space flight application and shall cover the selection, screening, qualification and applicable derating. In the event a suitable government baseline specifi
27、cation does not exist, the user shall approach the project parts engineer to identify the parts expert who can provide information on the best available industry standards to develop procurement specifications that meet the reliability goals. 6.0 INSTRUCTIONS EEE parts shall be processed in accordan
28、ce with the detailed requirements for the applicable part types and quality levels specified in Sections C1 through W1. Each section contains selection, screening, qualification, and derating tables. All tests shall be performed in the order shown unless otherwise approved by the project. Exceptions
29、 or additions to the requirements specified in any section shall be defined in the project MARs document. Applicable part quality levels shall be as defined by the project in the MARs. As a guide to project managers, design leads, and System Assurance Managers (SAMs), the following are typical missi
30、on characteristics applicable to each quality level: Level 1: Parts shall be selected and processed to this level for missions requiring the highest reliability and lowest level of risk. Level 1 active parts shall be reviewed for radiation hardness, and radiation testing is required when information
31、 is not available. The typical mission duration for Level 1 programs is 5 years or greater. Level 2: Parts shall be selected and processed to this level for missions with low to moderate risk, balanced by cost constraints and mission objectives. Level 2 active parts shall be reviewed for radiation h
32、ardness, and radiation testing is required when information is not available. The typical mission duration for level 2 programs varies from 1 to 5 years. Level 3: Parts represent inherently high risk or unknown risk because of the lack of formalized reliability assessment, screening and qualificatio
33、n. Also, there is little dependable data or flight history available for them as the continuos changes in design, materials and manufacturing processes may make the data on any particular LDC not applicable to another LDC. Level 3 parts are intended for mission applications where the use of high-ris
34、k parts is acceptable. Level 3 active parts shall be evaluated for radiation hardness, and radiation testing is required when information is not available. The typical mission duration for level 3 programs varies from less than 1 year to 2 years. 6.1 Parts Control Boards (PCBs) When PCBs are require
35、d by the project MAR or implemented by the contractor or developer, the PCB shall review all parts for compliance to established criteria. Review information shall include specifications, screening and qualification plans, supporting data, and application requirements required to determine acceptabi
36、lity. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6.2 Part Selection 6.2.1 General. Parts shall be selected in accordance with appropriate part type specification and quality level listed in Table 1of each section in this document. Table 1 also i
37、ndicates when screening (Table 2) and qualification testing (Table 3) are required for each risk level and part designation. Part procurement methods are discussed below. 6.2.2 Military Drawings (JAN Certified). Parts procured to Military Specifications or Standard Military Drawings (SMDs) usually c
38、ontain up to three reliability levels. Not all military levels are acceptable “as is” for space applications. For example, monolithic microcircuits offer classes V, Q, and M. Some passive devices such as resistors and capacitors are listed with S, R, or P established reliability levels. Table 1 of e
39、ach section documents which levels can be used as is and which require additional screening. It is the responsibility of the user to ensure that DSCC drawings and other military specifications satisfy the requirements specified herein, or to perform additional required inspections and tests specifie
40、d in this document. 6.2.3 Developer Controlled Drawings (SCDs). When parts cannot be procured to Military Specifications, a drawing (such as a Source Control Drawing) should be prepared by the developer to control procurement requirements. The drawing shall include the screening and qualification re
41、quirements specified in Tables 2 and 3 of this document for the applicable part type. The drawing shall also include performance parameters, absolute maximum ratings, dimensions, terminal descriptions, materials, and other unique requirements. Existing developer SCDs proposed for use shall be evalua
42、ted for compliance to Table 2 and 3 requirements. 6.2.3.1 Purchase orders for Manufacturer Screened and Qualified Parts. With project approval, unique screening and qualification requirements that are not normally performed by the manufacturer as part of their normal production practice may be place
43、d directly in the purchase order in lieu of preparation of a developer-controlled drawing. It is the responsibility of the user to require test data from the manufacturer in order to verify compliance. 6.2.3.2 For level 1 projects, if an acceptable Government-controlled specification is not availabl
44、e, an SCD is required. A preliminary copy of new SCDs shall be sent to the manufacturer for coordination. If procurement of the part through a SCD is not feasible due to cost, schedule or the availability of a manufacturer wiling to produce the part to the SCD requirements, the part may be procured
45、through a purchase order specifying the unique screening and qualification requirements as detailed in 6.2.3.1. 6.2.3.3 For level 2 projects, project parts engineer and PCB shall determine if an SCD is required for a part type or the purchase order as specified in 6.2.3.1 is adequate to meet project
46、s reliability requirements. 6.2.3.4 Level 3 projects do not require SCDs. However, if an existing procurement document is proposed for use, the SCD must meet level 3 requirements of this document for the applicable part type. Section 1 EEE-INST-002 Instructions for All Part Categories Page 5 of 12 5
47、/03 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6.2.4 Manufacturer High Reliability Parts. The term “MFR HI-REL” applies to parts that are procured to a manufacturer-controlled flow as described in the manufacturers catalog. The part flow is cont
48、rolled only by the manufacturer. A certificate of compliance is furnished by the manufacturer that they have been tested as advertised. These are often referred to as high reliability parts in the manufacturers catalog. In some cases, manufacturers add very little to their commercial process flows,
49、and yet call their product “high reliability.” It is the responsibility of the user to obtain test data to verify that the screening and qualification requirements specified in this document were met. 6.2.5 Commercial Parts. For the purpose of GSFC projects, this part designation represents all parts that do not con
