1、t. i MIL-A- 81 37 2 (AS) t 4. June 1970 _- - F - - I - - MILITARY SPECIFICATION ASSEMBLY, PRIORITY LOGIC 65A132F8 This specification has been approved by the Naval Air Systems Command, Departnient of the Navy. 1. SCOPE 1.1 Scope - The equipment covered by this specification shall be capable of contr
2、olling weapon station piority. 1.2 Classification - Priority logic assembly 65A132F8 shall consist of the item listed in 6.9. 2. APPLICABLE DOCUMENTS 2.1 General - The documents listed in 6.11 of the issue in effect on the date of invitation for bids form a part of this specification to the extent s
3、pecified herein. 3. REQUIREMENTS 3.1 Preproduction - This specification makes provision for preproduction testing. 3.2 Parts and Materials - In the selection of parts and materials, fulfullment of major design objectives shall be the prime consideration. In so doing the following shall govern: (1) .
4、 Microelectronic items shall conform to requirements specified herein. (2) Other parts and materials requirements shall conform to Specifi- cation MIL-E-5400. (3) Nonrepairable subassemblies, as outlined in Specification MIL-E- 5400, shall be used when practicable. The general size of the subassembl
5、y and the amount of circuitry to be included therein shall be approved by the procuring activity. Nonrepairable sub=;_. assemblies must be reliable (see 6.4). - /- y THIS DOCUMENT CONTAINS a, PAGES, 1 f - FSC 1280 Provided by IHSNot for ResaleNo reproduction or networking permitted without license f
6、rom IHS-,-,-A MIL-A-L372 12 777770b 0357277 L W- MIL-A-81 372(AS) (4) When previously prouced models of this equipment did not use nonrepairable subassemblies, the design shall not be changed to employ nonrepairable assemblies without the approval of the procuring activity. 3.2.1 Nonstandard Parts a
7、nd Materials Approval - Approval for the use of nonstandard parts and materials (including transistors and diodes) shall be obtained as out- lined in Specification MIL=E-5400. 3.2.2 Microelectronic Modular Assemblies - When used, microelectronic modular assenrblics shall be described by a contractor
8、 procurement specification and must be approved by the- procuring agency. Microelectronic modular assemblies (microelectronic circuits) (MICS) shall be contained within maintenance modules (for example, on printed circuit cards). The choice of microelectronic modular assemblies shall be based on at
9、least two sources of supply, which can be used interchangeably. 3.2.3 Modules, Maintenance - The electronic portions of the equipment shall be divided into maintenance modules (see Specification MIL-S-23603). Maintenance modules shall normally be considered repairable. 3.2.4 Microelectronic Intercha
10、ngeability - Microelectronic circuits (MICS) shall be interchangeable at the MC level, or at the maintenance module level when approved by the procuring activityl(see 6.13). 3.3 Design and Construction - The equipment shall conform with all the applicable requirements of Specification MIL-E-5400 for
11、 design, construction and workman- ship, except as otherwise specified herein. 3.3.1 Total Weight - The total weight of the equipment, excluding cables, shall be a minimum consistent with good design and shall not exceed 3.5 ounces. 3.3.2 Reliability - 3.3.2.1 Operational Stability - The equipment s
12、hall operate with satisfactory performance, continuously or intermittently for a period of at least 1,000 hours without the necessity for readjustment of any controls which are inaccessible to-the operator during normal use. 3.3.2.2 Operating Life - The equipment shall have total operating life of 1
13、0,000 hours with reasonable servicing and replacement of parts. Parts requiring scheduled replacement shall be specified by the contractor. 3.3.2.3 Reliability in Mean Time Between Failure (MTBF) - Thc equipment shall have, - :/ 4.4.3.4- Pwformniicc Characteristics to be Measured - The performance c
14、haracl teristics to be measured shall be as specified in 6.10. . i-, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-8 1372 (AS) 4.4.3.5 Failure Criteria - in addition to the requirements of MIL-STD-781, the following requirements shall be used
15、 to determine when a failure has occurred during the test: . (1) Whenever performance charactertics fall below the acceptance requirement (4.4.3.4) at least one failure has occurred. If subse- quent analysis reveals that several parts have deteriorated, each shall be counted a failure, unless one ca
16、used the other parts to fail. 4.4.3.6 Preventive Maintenance - During the period of the tests no preventive maintenance measures are required. 4.4.4 Special Tests - Special tests shall be conducted on a quantity of equip- men Preproduction and Equ- 9 % fnspecthq, for Aircraft Electronic Nomenclature
17、: and Nameplates for Equipment Aeronautical i Ieatronic and Associated System Readiness/Maintainability ; Avionic Systems Design, General Specification for Electric Power, Aircraft Characteristics and Utilization of Reliability Tests Exponential Dis tribution Naval Air Systems Command MIL-P-81361 (A
18、S) Programmer, Aircraft Weapons Release Set MX-7016( * )/AWE-1 6.11.1 Availability of Documents - (i) When requested specifications, standards, drawings, and publica- tions refer to both title and number. Copies of this specification .and applicable specifications required by contractors in connecti
19、on with specific procurement functions may be obtained upon applica- tion to the CornmaningOfficer, Naval Supply Depot, Code 105, 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120. f- -4- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 -MlL-A-813
20、72 12 W 777770b 0357277 O E - M these involve production independence, corporate (or firm) and financial independence, and geographical separation. The production independence of one source of another is determined by the extent to which the one source is independent of the other for manufacture; an
21、d by the lack of common original suppliers of raw or processed materials . Design, process information, technology, and diffusion masks may be derived from a common source. However, in such a case, each device source shall have a demonstrated capability of originating these items. The corporate (or
22、firm) and inancial independence of one source of another is determined by the absence of common direotors, common officers, or holders of large common financial interests. Geographical separation is simply the distance between the locations where principal manufacture takes place by two sources. 6.1
23、s Microelectronic interchangeability Demonstration - interchangeability of mcroeleectronic elements shall be demonstrated as follows : For the interchangeability at the MIC level, it shall be demonstrated for each type of functional MIC from one source, as used in the system, that it is mechanically
24、 and electrically interchangeable with that from another source (see 6.12). For the interchangeability at the maintenance module level, it shall be demonstrated that modules typical of those to be used in the system composed of MICS from one source are mechanically and electrically interchangeable w
25、ith modules composed of MICS from another source. For the completed equipment, it shall be demonstrated that modules composed of MICS from one source are interchangeable with cor- responding modules composed of MICS from another source. When interchange lias been effected, no degradation shall take
26、place in system and subsystem performance. . 24 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-81372 12 I 777770b 0357300 3 MIL- A- 8 1372 (AS) I .r I . rl . -_ - ._ . Provided by IHSNot for ResaleNo reproduction or networking permitted with
27、out license from IHS-,-,-, MIL-A-1372 12 7777906 0357303 5 i MIL-A-81372 (AS) i - 5.375 f O. 005 O O +I tf Co u! M - 1.29390.005 1.898 0.005 -4 m A-1951 I 3.578.10.035 i? . Figure 2. Outline Dimensions /- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
28、-,-MIL-A-81372 (AS) 2 rw MSA TEKTRONIX SCILLOSCOP OR EQUIVALENT TRIMER O ORO O +IOV oc PIN 22 I CRD - PIN 20 *IOV OC TYPE MIA TEKTRONIX OSCILLOSCOPL: OR E&IIVALENT 1 CHANNEL O PIN 8 A-lB5i 3 r *lOV DC Il PIN W 4.M Figure 3, Test Arrangement 1 TRIOGER o RD O CHANNEL c I Tm SIM TKTRONlX DSCILLWCH OR C
29、OU IVALENT A GRO 1 ORO PIN 20 +H)v Dc PIN P 4-frnSI4 IK ph- +IavDc TRSGER O a0 O 1 PIN R I ORO PIN 20 Figure 5. Test Arrangement 3 . Figure 4. Test Arrangement 2 OSCILLOSCOPE OR EOUIVALENT TMQGER 0- PIN 5 GR0 PIN 20 CHANNEL PIN T 1 A-(Ml6 Figure 6. Test Arrangement 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
