1、 MIL-DTL-62741A m 9999906 2058968 Tb7 m INCH-POUNDI MIL-DTL-6274 1 A(AT) 23 Januarv 1998 SUPERSEDING 16 March 1992 MIL-P-6274 1 (AT) DETAIL SPECIFICATION PIUNTED WIRING ASSEMBLY, WADCON This specification is approved for use by the U. S. Army Tank-automotive and Armaments Command, Department of the
2、Army, and is available for use by ali Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the Multipledhalog to Digital Converter (MudADCON) Printed Wiring Assembly, referred to herein as the PWA. This is one of the six printed wiring assemblies that
3、comprise the Simplified Test Equipmenthnternal Combustion Engine-Repregrammable (STEACE-R) Vehicle Test Meter (VTM) (see Drawing 12259265). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include
4、 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 requirement documents cited in sections 3 and 4
5、of this specification, whether or not they are listed. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-EBLUE, Warren, MI 48397-500
6、0, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. AMSC NIA FSC 5998 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted w
7、ithout license from IHS-,-,-MIL-DTL-6274 1 A(AT) 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
8、 those listed in the issue of the Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation (see 6.2). STANDARDS DEPARTMENT OF DEFENSE MIL-STD-8 10 - Environmental Test Methods and Engineering Guidelines (see 4.2.1). (Unless otherwise indi
9、cated, copies of the above specifications, standards, and handbooks are available f-om the Standardization Document Order Desk, 700 Robbins Avenue, Bldg. 4D, Philadelphia, PA 191 11-5094.) 2.2.2 Other Government documents. drawings, and publications. The following other Government documents, drawing
10、s, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWINGS ARMY 12258777 - Printed Wiring Assembly, MUX/ADCON. (Copies of these drawings are available from the U.S. Army Tank-automotive and Arm
11、aments Command, ATTN: AMSTA-TR-EBLUE, Warren, MI 48397-5000.) 2.3 Non-Government uublications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specifed, the issues of the documents which are DoD adopted are those listed in the issue of the DoDI
12、SS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI/PC J-STD-O01 - Requirements for Soldered Electrical and Electronic Assembl
13、ies. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- flIL-DTL-6274LA m 9999906 2058970 615 m Source Voltage P1-5, 8 +5 Vdc i/ Pl-13, 14 +15 Vdc P1-19,20 -15 Vdc Pl-7,8 +8 Vdc Pl-17, 18 -8 Vdc MIL-DTL-6274 1 A(AT) Current 0.130 A 2/ 0.040 A 0.040 A
14、 0.004 A 0.004 A (Application for copies should be addressed to the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036.) 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
15、 takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample PWA shall be subjected to first article inspection in accordance with 4.1.1. 3.2 Desig
16、n. materials. and manufacturing processes. Design, materials, and manufacturing process selection shall be as specified herein and in applicable referenced specifications, standards and drawings. Materials shall be uniform and free fiom imperfections or defects which affect their performance and ser
17、viceability. All metallic parts shall be made from corrosion resistant metals or treated with corrosion-resistant materials. Asbestos and cadmium materials shall not be used in any form in any part of the PWA. No item, part or assembly shall contain radioactive materials in which the specific activi
18、ty is greater than 0.002 microcuries per gram or activity per item equals or exceeds 0.01 microcuries. 3 2.1 Recvcled. recovered. or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the mate
19、rial meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3 Operatinn reauirements. Each PWA shall provide the following inctional, operational, and performance capabilities. 3.3.1 Inuut Dower. The PWA shall require not more than t
20、he current specified in table I. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-6274 1 A(AT) 3.3.2 Complementarv metal oxide semiconductor (CMOS) logic levels. Unless otherwise specified (see 6.2), CMOS logic levels accepted by and output
21、fiom the PWA shall be as follows: Input High (Logic Level 1) = 3.5 Vdc minimum (min) Input Low (Logic Level O) = 1.5 Vdc maximum (max.) Output High (Logic Level 1) = 4.5 Vdc min Output Low (Logic Level O) = 0.5 Vdc max. 3.3.3 Inuut/output logic. (NOTE: A “P following a capitalized logic name denotes
22、 logic negation.) 3.3.3.1 Output clocks. The signal at U7-10 shall be determined by the signals at Pl-29 (IO9/1) and Pl-37 (OEN-QT) and shall conform to the waveforms shown in figure 1. The signal at U74 shall be determined by the signals at Pl-30 (ION2) and Pl-37 (OEN-Q/) and shall conform to the w
23、aveforms shown in figure 2. 3.3.3.2 Output latches. Logic levels at Pl-21 through Pl-26 (BUS O through BUS 5) shall be latched by U1 and appear at U1 pins 2, 5, 7, 10, 15 and 12, respectively, when clocked by U7- 1 O as shown in figure 3. Logic levels at P 1-2 1 through P 1-26 (BUS O through BUS 5)
24、shall be latched by U2 and appear at U2 pins 15, 12, 10, 7, 2, and 5, respectively, when clocked by U7-4 as shown in figure 4. 3.3.3.3 Voltage level shifterS. Logic levels present at U3, U4, and U5 pins 3, 6, 10, and 14 shall be shifted as shown below and shall be present at U3, U4, and U5 pins 4, 5
25、, 13, and 11, respectively, within 600 nanoseconds (ns) of their application to the input. Output High (Logic Level 1) = (voltages at U5 pin 16) - 0.30 Vdc minimum Output Low (Logic Level O) = 0.5 Vdc maximum 3.3.3.4 Input clocks. The signal at U7-3 shall be determined by the signals present at Pl-2
26、9 (IO9/1) and Pl-36 (MRD) and shall conform to the waveforms shown in figure 5. The signal at U7-11 shall be determined by the signals present at Pl-30 (IONZ) and Pl-36 (MRD) and shall conform to the waveforms shown in figure 6. 3.3.3.5 Input buffers. Logic levels present at U16 pins 12, 14, and U24
27、 pins 2, 4, 14, 12, 10, and 6 shall be present on Pl-28 through Pl-21 (BUS 7 through BUS O) when the signal at U7-3 is active as shown in figure 7. Logic levels present at U6 pins 6,2, 4, 10, and U16 pins 6,4, 2, and 10 shall be present on Pl-28 through Pl-21 when the signal at U7-11 is active as sh
28、own in figure 8. The signal present at Pl-40 shall be present at U6-11 within 90 11s of its application at Pl-40 regardless of any other signal. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(+I Input Pl-98 P 1-96 Pl-94 Pl-100 Pl-90 P1-88 P 1-86
29、Pl-92 P1-82 Pl-so Pl-78 Pl-84 Pl-61 Pl-55 Pl-51 P1-47 P1-45 Pl-54 Pl-52 Pl-9 P1-48 P1-44 P1-46 P1-42 Pl-58 Pl-62 MIL-DTL-6274LA 9999906 2058972 498 (-1 1 Attenuation MIL-DTL-6274 1 A(AT) BUS I Input voltage 3.3.4 Internal logic levels. Logic levels accepted by US, U9, U13, U14, U18, u19, u20, U21, U
30、22, U23, and U26 shall be: 1:l 1:l 1:l 1:l 1: 1 1: 1 1: 1 1:l 1:l 1:l 1:l 1:l 1O:l 7: 1 7: 1 7: 1 7:l 7: 1 3: 1 7: 1 i 7:l 7: 1 7:l 1: 1 1: 1 Input High (Logic Level 1) = 5.6 Vdc min Input Low environment requirements verification. The electrical performance tests specified in 4.2.3.1 through 4.2.3.
31、8 shall be conducted prior to and at the completion of each environmental test. Verification of performance during high temperature and low temperature testing shall be demonstrated by the tests specified in 4.2.3.3 through 4.2.3.8. 4.2.6.1 Temperature. To determine conformance to 3.6.1, the PWA sha
32、ll be tested as follows. 4.2.6.1.1 High temperature (operatind. To determine conformance to 3.6.1.1, the PWA shall be subjected to high temperature test in accordance with method 501.3, procedure II (hot category), of MIL-STD-810, or equivalent (see 4.2. i), and tested to 3.3. 4.2.6.1.2 Low temperat
33、ure !operatining. 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 personnel, these personnel need to contact the responsible packaging activity to ascertain requisite packaging
34、requirements. Packaging requirements are maintained by the Inventory Control Points packaging activity within the Military Department or Defense Agency , or within the Military Departments System Command. Packaging data retrieval is available from the managing Military Departments or Defense Agencys
35、 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 helpfiil, but is not mandatory.) 6.1 Intended use. The PWA multiplexes nineteen 5 V channels, one 15 V channel,
36、 eleven 35 V channels, and one 50 V channel to a single high- impedance instrumentation amplifier. A summing amplifier allows an offset to be subtracted from the output of the instrumentation amplifier. Gains of 1, 10, 30, and 60 along with 2-pole low-pass filter frequencies of 6,60, 600, and 6000 H
37、z are software selectable. A 12-bit ADCON (analog to digital converter) with a i 5 V signal range can convert an analog input to a digital output every 25 microseconds. The PWA is 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-6274LA m 9
38、999906 2058983 273 m MIL-DTL-62741 A(AT) military unique because it is designed specifically to be a component of the Simplified Test Equipmenthternal Combustion Engine - Reprogrammable (STEfiCE-R) Vehicle Test Meter (VTM), and to withstand environmental conditions which exceed commercial requiremen
39、ts. 6.2 Acuuisition reauirements. Acquisition documents should specfi the following: a. Title, number, and date of this specification. b. Issue of DoDISS to be cited in the solicitation, and if required, the specific issue of individual documents referenced (see 2.2. i). c. If first article inspecti
40、on is required (see 3. i). d. PWA drawing numbers, revision letter, date and PWA part number (see 3.2 and 3.5.2). e. If marking is other than as specified (see 3.5.2). f. If burn-in is not required (see 3.6.5). g. If CMOS logic levels should be other than as specified (see 3.3.2). h. Whether ATE tes
41、t is required (see table VII footnote). i. Packaging requirements. 6.3 First article. When first article inspection is required, the contracting officer should provide specific guidance to offerors. This guidance should cover whether the first article is a first article sample, first production item
42、, or the number of test items. These documents should also include specific instructions regarding arrangements for examinations, approval of first article test results, and disposition of first articles. pre-solicitation documents should provide Government waiver rights for samples for fust article
43、 inspection to bidders offering a previously acquired or tested product. Bidders offering such products who wish to rely on such production testing must hrnish evidence with the bid that prior Government approval is appropriate for the pending contract. 6.4 Conformance inspection. Affordable conform
44、ance inspection with conidence varies depending upon a number of procurement risk factors. Some of these factors include: Contractor past performance, Government schedules and budget, product material and design maturity, manufacturing capital equipment and processes applied, the controlled uniformi
45、ty of those processes, labor skill and training, and the uniformity of measuring processes and techniques. During the solicitation, contracting documents should indicate those tests desired from table v1I and their designated frequency based on a risk assessment for the procurement. 6.5 Subiect term
46、 (key word) listing. Analog to digital convertor (ADCON) Ignition inhibits Ignition signal outputs Multiplex (Mux) Simplified test equipmenthternal combustion engine - Reprogrammable (STELICE-R) 16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL
47、-DTL-ZIIA 9999906 205898Y LOT MIL-DTL-6274 1 A(AT) 6.6 Changes from Drevious issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. PI-29 H 10911 L I I I I 1 I I P1-37 u7-10 P 1-30 IOAI2 P 1-37 OEN-Q u7-4 :O ns
48、 MIN. o ns MIN.; H L I I I I I I I 1oonsMAx H= LOGIC LEVEL 1 L= LOGIC LEVEL O FIGURE 1. Waveforms to generate U7-10 clock. H L I I I I I I I I H :0llSMIN. 0nSMIN.: I l I L I l I I I I I ; 11onsMAx. 1oonsMAx I H a I I I“I L H= LOGIC LEVEL 1 L= LOGIC LEVEL O FIGURE 2. Waveforms to generate U74 clock.
49、17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-u7-10 Pl-21 THROUGH Pl-26 u1-2, 5,7,1 O, 15,12 u7-4 Pl-21 BOUGH Pl-26 U2-15, 12,10,7, 2,s PI-36 MRD PI-29 Io9/1 u7-3 MIL-DTL-6274LA m 9999906 2058985 04b m MIL-DTL-6274 1 A(AT) H L I L! I I I H I I l L DATAINVALID j( I I I I I I i 300nsMAX. H Y h DATAOUTVALID L H= LOGIC LEVEL 1 L= LOGIC LEVEL o F
