ARMY MIL-DTL-62740 A-1998 PRINTED WIRING ASSEMBLY SPECIAL CIRCUITS《专用线路印刷线路装配》.pdf

1、 flIL-DTL-627LIOA 9999906 2059338 933 I INCH-POUND I 23 Janwy 1998 SUPERSEDING 16 March 1992 MILDTL-6274OA(AT) MIL-P-62740( AT) DETAIL SPECIFICATION PRINTED W“G ASSEMBLY, SPECIAL CIRCUITS This specification is approved for use by U.S. Army Tank-automotive and Armaments Command, Department of the Arm

2、y, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a Special Circuits Printed Wig Assembly referred to herein as the PWA. This is one of six printed wiring assemblies which comprise the Simplified Test Equipmenthter

3、nal Combustion Engine-Reprogrammable (STEfiCE-R) Vehicle Test Meter (VIM) (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 documents in other sections of this speci

4、fication 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 a specified requirement documents cited in sections 3 and 4 of this specification, whether or not they are lis

5、ted. 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 48397-5000, by using the Standardization Document Improveme

6、nt Proposal (DD Form 1426) appearing at the end of this document, or by letter. I AMSC NIA FSC 5998 DISTRIBUTION STATEME“ A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-b2740A M 9999

7、906 2059319 87T M 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 listed in the issue of t

8、he 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-810 - Environmental Test Methods and Engineering Guidelines (see 4.2.1). (Unless otherwise indicated, copies of the above speci

9、fications, standards, and handbooks are available fkom the Stanhdization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191 11-5094.) 2.2.2 ther Government documents. drawings. and publications. The following other Government documents, drawings, and publications form a part

10、of this document to the extent specified herein. Unless otherwise spded, the issues are those cited in the solicitation. -_ DRAWINGS DEPARTMENT OF DEFENSE 12258774 - Printed Wiring Assembly, Special Circuits. (Copies of these drawings are available fiom the U. S. Army Tank-automotive and Armaments C

11、ommand, AMSTA-TR-EBLUE, Warren, MI 48397-5000.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specilied, the issues of the documents which are DoD adopted are those listed in the issue of the DoDISS cited in the

12、 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 STANDARD INSTITUTE (ANSI) ANSI/IPC J-STD-O01 - Requirements for Soldered Electrical and Electronic Assemblies. 2 Provided

13、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-bZ740A = 99999Ob 2059320 591 Source P1-5,6 (Application for copies should be addressed to American National Standard Institute, 11 West 42nd Street, New York, NY 10036.) Voltage CW select. When a logic

14、level O is present at U21 pins 1 1, 10, and 9, the frequency of the signal at U21 pin 14 shall be the same as the frequency of the signai at U9 pins 14 and 15. The signal at U21 pin 14 shall be at Pl-64 no greater than 250 11s later. When a logic level O is present at U21 pins 10 and 9 and a logic l

15、evel 1 is present at U21 pin 11, the frequency of the signal at U21 pin 14 shall be the same as the fi-equency of the signal at U3 pin 7. The signal at U21 pin 14 shall be at Pl-64 no greater than 250 11s later. 3.3.10 Test push button debouncer. With a logic level O at Pl-50 and Pl-52 not connected

16、, U6 pin 3 and Pl-56 shall be at logic level O. When a logic level O is applied at Pl-52 and Pl-50 is open-circuited, U6 pin 3 and Pl-56 shall change to a logic level 1 in no greater than 400 ns. When a logic level O is applied at Pl-50 and Pl-52 is open-circuted, U6 pin 3 and Pl-56 shall change to

17、a logic level O in no greater than 400 ns. 3.3.11 Microprocessor interrupt. 3.3.1 1.1 Microprocessor interrupt signal. With a logic level 1 present at U6 pin 5, a logic level O shall appear at Pl-62 no greater than 1050 ns after the rising edge of the signal at U6 pin 3. With a logic level 1 present

18、 at U6 pin 9, a logic level O shall appear at P1-62 no greater than 1050 11s after the rising edge of the signai at U6 pin 11. A logic level O shall appear at Pl-60 no greater than 300 ns after the rising edge of the Signai at U6 pin 1 1. 3.3.1 1.2 Interrupt reset. When a logic level 1 is applied at

19、 P 1-99, a logic level 1 shall appear at Pl-62 no greater than 330 ns later. 3.3.12 Ignition signal pulse slxmer. The frequency of the signai at U3 pin 6 shall be the same as the fi-equency of a signal applied at Pl-86. The fi-equency can range from 2 Hertz (Hi) to 700 Hz. The rising edge of the sig

20、nal at U3 pin 6 shall occur between 3 1.3 and 63.2 microseconds (ps) - environment reauirements verification. The electrical performance tests specified in 4.2.3 through 4.2.3.17 shall be conducted prior to and at the completion of each environmental test. Verification of performance during the high

21、 temperature and low temperature 15 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-b27YOA m 999990b 2059333 LYT m environmental tests shall be demonstrated by the tests specified in 4.2.3.1,4.2.3.5,4.2.3.6, 4.2.3.7, and4.2.3.16. 4.2.6.1 Temp

22、erature. To determine conformance to 3.6.1, the PWA shall be tested as follows: 4.2.6.1.1 Hi U1 1, U12) provides -3.75 to 3.75 Vdc according to a 10-bit binary input. A four input digital Multiplexor (U3) can be controlled to route signals through a Divide by n+l Counter (US), which can selectively

23、divide the input frequency by any number fiom 1 to 64. A Test Push Button Debouncer (U6, U7) provides a clean signai for the microprocessor interrupt signal and an event flag. The output of the Multiplexor or the Divide by 17 Provided by IHSNot for ResaleNo reproduction or networking permitted witho

24、ut license from IHS-,-,- MIL-DTL-62740A 9999906 2059335 TL2 n+l Counter can be used as microprocessor interrupts and event flags as well. The Ignition Signal Pulse Shaper (Ul, U4, U8) improves the quality of the ignition signai so that it can be measured using the Divide by n+l Counter or so that it

25、 can selectively drive an interrupt signai. The Pulse Tachometer Deghtcher (U2, U4, U5) provides a clean, square wave signai of double the input fiequency. The Full Wave Rectifier (US, U13, U14) is software selectable. The PWA is military unique because it is designed specifically to be a component

26、of the Simplied Test Equipmenthternai Combustion Engine - Reprogrammable (STE/ICE-R) Vehicle Test Meter 0 and to withstand environmental conditions which exceed commercial requirements, 6.2 Acquisition reauirements. Acquisition documents must specify the following: a. Title, number, and date of this

27、 specification. b. Issue of DoDISS to be cited in the solicitation, and ifrequired, the specific issue of individual documents referenced (see 2.2.1 and 2.3). c. Iffirst article inspection is required (see 3.1). d. PWA drawing number, revision letter, date and PWA part number (see 3.2 and 3.5.2). e.

28、 IfCMOS logic levels should be other than as specified (see 3.3.3). f. Ifmarking is other than as specified (see 3.5.2). g. Ifburn-in is not required (see 3.6.5). h. IfATE test is required (see table IV footnote). i. Packaging requirements (see 5.1). 6.3 First article. When rst article inspection is

29、 required, contracihg documents should provide specific guidance to offerors. This guidance should cover whether the first article is a first article sample, a first production item, or the number of test items. These documents should also include specific instructions regarding arrangements for exa

30、minations, approval of rst article test results, and disposition of first articles. Pre-solicitation documents should provide Government waiver rights for samples for first article inspection to bidders offering a previously acquired or tested product. Bidders offering such products who wish to rely

31、 on such production testing must furnish evidence with the bid that prior Governkent approval is appropriate for the pending contract. 6.4 Conformance inspection. Affordable codoxmance inspection with confidence varies depending upon a number of procurement risk factors. Some of these &ors include:

32、Contractor past performance, Governent schedules and budget, product material and design maturity, manufacturing capital equipment and processes applied, the controlled uniformity of those processes, labor skill and training, and the uniformity of measuring processes and techniques. During the solic

33、itation, contracting documents should indicate those tests desired fiom table IV and their designated fiequency based on a risk assessment for the procurement. 18 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i MIL-DTL-62740A( AT) 6.5 Historical da

34、ta. Historically, ATPD 2146, dated 9 March 1988, was superseded by MIL-P-6274O(AT). 6.6 Subiect term (key word) listing. Automatic Testhg Equipment (ATE) test Ignition inhibits Ignition signai outputs Simplified Test Equipmenflnternd Combustion Engine - Reprogrammable (STEDCE-R) Vehicle Test Meter (

35、VTM) 6.7 Changes from previous 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. Pl-31 IOB13 Pl-37 OEN-Q U27-4 Pl-32 IOC/4 Pl-37 OEN-Q U27-11 H L H L H L H L H L H L I 1 I I I I I I i250 ns MAT. I h I l I

36、I I I H= LOGIC LEVEL1 . L= LOGIC LEVELO FIGURE 1. Waveform to generate U274 clock. I I l I I I I I l I I I I I 1 I l I 1 I I I I I I :250 ns M,AX. I I l I H= LOGIC LEVELI L= LOGIC LEVELO FIGURE 2. Waveforms to generate U27-11 clock. 19 Provided by IHSNot for ResaleNo reproduction or networking permi

37、tted without license from IHS-,-,-Pl-33 IOD/S Pl-37 OEN-Q U27- 1 O Pl-34 IOE/6 Pl-37 OEN-Q U27-3 H L H L H L H L H L H L I l I I I 1 I t I i 250 ns m. I l I I I I I I I l I 1- I 1 I H= LOGIC LEVEL1 L= LOGIC LEVELO FIGURE 3. Waveforms to generate U27-10 clock. I I I I I I I I I I I I l I I I I I I I

38、I I I I I 250 ns MAX. m I I I H= LOGIC LEVEL 1 L= LOGIC LEVELO FIGURE 4. Waveforms to mm-ate U27-3 clock. 20 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-62740A 9999906 2059338 721 100K 100 I 1K+1 I 100K k 100 I FIGURE 5. Resistor network

39、 for 1. O mA current source testing. 100K 1- 100 10K f. 10 ? 100K 2 100 I 1 Pl-100 FIGURE 6. Resistor network for O. 1 mA current source testG. 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62740A m 9999906 2059339 bb8 m Test Duration: 1

40、20 minUtes er 500 des 1.000 c veraii rms level 1.98 G 0.5OOO 1 02wl%l 0.1000 t 0.0020 0.0010 50.000 100.ooo 200.000 5.000 1O.oooO 20.000 BREAKPOINTS FREQ 5 6 7 8 10 11 12 13 18 23 24 26 28 32 33 37 49 63 73 98 120 123 138 140 146 159 163 188 200 PSD VALUE 023840 O. 16840 0.38230 0.14870 0.16840 0.05

41、930 0.09750 0.04090 0.05370 0.01940 0.03520 0.02310 0.03520 0.0 1 670 0.031 10 0.00810 0.02190 0.00700 0.01150 O.Oo660 0.00970 0.00680 0.01340 0.00760 0.02490 0.02820 0.01300 0.00480 0.01340 FIGURE 7. Basic transportation comDosite tactical wheeled errvironment. vertical axis. 22 Provided by IHSNot

42、for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-DTL-b2740A 999990b 2059340 3T Test Duration: 120 minutes per 500 miles Overall nns level 2.54 G 1 .o00 0.5000 4 0.0500 - 0.0200 - 0.0100 0.0050 i , 0.0020 0.0010 50.000 100.0 200.000 5.000 10.0000 20.000 BREAKPOMTS R

43、EQ 5 6 7 8 9 12 15 16 19 22 24 27 32 36 40 44 48 53 56 60 64 65 68 69 114 132 160 169 173 200 PSD VALUE 0.22130 O. 13 140 0.20540 0.38230 0.1 5630 0.07990 0.08830 0.32940 0.06080 0.09280 0.26340 0.05640 022690 0.02820 0.11600 0.02090 0.08190 0.01480 0.07420 0.01270 0.04980 0.01100 0.03260 0.01480 0.

44、00740 0.00830 0.00510 0.01710 0.00550 0.00310 FIGURE 8. Basic transportation comDosite tactical wheeled environment. longitudinal axis. 23 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-DTL-b27LiOA = Ob 20593LiL 2Lb Test Duration: 120 minutea pe

45、r Mo miles Overaii nus level: 2.00 G 0.0500 - 0.0200 - 0.0100 - 0.0050 - 0.0020 0.0010 5.000 10.0000 20.000 50.000 100. 200.000 FREQ 5 10 11 12 13 15 16 17 22 24 26 28 30 32 38 40 44 48 50 56 60 63 70 78 93 137 145 162 176 200 PSD VALUE 0.25490 O. 13030 0.0%70 0.13360 0.06500 0.06340 0.1 1230 0.0650

46、0 0.04590 0.08980 0.05070 0.06830 0.03670 0.058O 0.01920 0.03860 0.01290 0.02940 0.01140 0.02460 O.OO960 0,01880 0.00660 0.01500 0.00730 0.00460 0.00910 0.00430 O.Oo660 0.00360 FIGURE 9. Basic transportation. composite tactical wheeled environment. transverse axis. 24 Provided by IHSNot for ResaleNo

47、 reproduction or networking permitted without license from IHS-,-,-J Custodian: Army - AT MIL-DTL-62740A( AT) 0.04 g*2/Hz 20 -3dB/Octave 80 350 2000 Frequecy (Hz) FIGURE 1 O. Random Vibration Spectrum. Preparing Activity: Army - AT (Project 5998-0075) 25 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-