1、 REVISIONS LTR DESCRIPTION DATE APPROVED A Add new resistance tolerance (B). Add new dimensional changes. Add new operating voltage. Add new ppm/C (25). Add new suppliers. Editorial changes throughout. 23 MAY 88 D. Moore B Add new requirements for resistance characteristic, power ratings, solderabil
2、ity, and dimensions. 10 MAY 89 D. Moore C Changes in accordance with NOR 5905-R002-93. 31 AUG 93 D. Moore D Change reference to MIL-PRF-914. Editorial changes throughout. 29 AUG 00 K. Cottongim E Changes in accordance with NOR 5905-R004-03. 17 FEB 02 K. Cottongim F Add pure tin, manufacturers eligib
3、ility, and pulse application paragraphs. Correct figure 1 reference pin. Remove vendor. Editorial changes throughout. 14 JUN 12 M. Radecki CURRENT DESIGN ACTIVITY CAGE CODE 037Z3 HAS CHANGED NAMES TO: DLA LAND AND MARITIME COLUMBUS, OHIO 43218-3990 Prepared in accordance with ASME Y14.100 Source con
4、trol drawing REV STATUS OF PAGES REV F F F F F F F F PAGES 1 2 3 4 5 6 7 8 PMIC N/A PREPARED BY Allan R. Knox DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OH Original date of drawing 3 August 1987 CHECKED BY David W. Withrow TITLE RESISTOR NETWORKS, FIXED, FILM, SURFACE MOUNT, 28 PIN, LEADLESS CHIP CAR
5、RIER APPROVED BY David E. Moore SIZE A CODE IDENT. NO. 14933 DWG NO. 87015 REV F PAGE 1 OF 8 AMSC N/A 5905-2012-E16 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 870
6、15 REV F PAGE 2 1. SCOPE 1.1 Scope. This drawing describes the requirements for a 28 pin, leadless chip carrier, resistor network. These networks are available in hermetically sealed and nonhermetically sealed packages. 1.2 Part or Identifying Number (PIN). The complete PIN is as follows: 87015 - *
7、* * * Drawing number Schematic (1.2.1) Resistance value designations (1.2.1.1) Resistance tolerance (3.3.1) Characteristic (1.2.1.2) 1.2.1 Schematic. The schematic of the resistor network is identified by a single letter in accordance with figure 1. FIGURE 1. Schematics. Provided by IHSNot for Resal
8、eNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 87015 REV F PAGE 3 1.2.1.1 Resistance values. The resistance values are in accordance with MIL-PRF-914. 1.2.1.2 Characteristic. Resistor networks a
9、re available in characteristics C, H, R, or V in accordance with MIL-PRF-914 (see 3.2). 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified here
10、in. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE SPECIFICATION MIL-PRF-914 - Resistor Networks, Fixed, Film, Surface Mount, Nonestablished Reliability, and Established Reliability, General Specification For. DEPARTME
11、NT OF DEFENSE STANDARD MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-790 - Established Reliability and High Reliability Qualified Products List (QPL) Systems for Electrical, Electronic, and Fiber Optic Parts Specifications. MIL-STD-1285 - Marking of Electrical and
12、 Electronic Parts. * (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) * 2.2 Order of precedence. Unless otherwise noted herein or in the contract,
13、 in the event of a conflict between the text of this document and the references cited herein (except for related, specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obt
14、ained. 3. REQUIREMENTS 3.1 Item requirements. The individual item requirements shall be in accordance with MIL-PRF-914 and as specified herein. 3.2 Interface and physical dimension requirements. Resistors shall meet the interface and physical dimensions as specified in MIL-PRF-914 and herein (see fi
15、gure 2). Cavity construction using wire bonding techniques shall be supplied only as a characteristic C hermetically sealed resistor network. 3.2.2 Termination. Termination finish shall be tin-lead or hot solder dip as specified in MIL-PRF-914. * 3.2.2 Pure tin. The use of pure tin, as an underplate
16、 or final finish is prohibited both internally and externally. Tin content of resistor components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.5). Provided by IHSNot for ResaleNo reproduction or networking permitted without li
17、cense from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 87015 REV F PAGE 4 Inches .003 .005 .010 .015 .016 mm 0.08 0.13 0.25 0.38 0.41 Inches .020 .025 .040 .050 .085 mm 0.51 0.64 1.02 1.27 2.16 Inches .320 .350 .520 .550 mm 8.13 8.89 13.21 13.97 NOTES:
18、1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Unless otherwise specified, tolerances are .008 (0.20 mm). 4. Adjacent corner pads may be rounded or diagonally cut to meet the .015 (0.38 mm) minimum requirement. FIGURE 2. Leadless chip carrier. Provided
19、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 87015 REV F PAGE 5 3.3 Electrical characteristic. 3.3.1 Resistance tolerance. Resistors are available in (B) .1 percent, (D) .5
20、percent, (F) 1 percent, (G) 2 percent, and (J) 5 percent tolerances. 3.3.2 Resistor power ratings. The power rating for individual resistors shall be 0.05 watt maximum at 70C. 3.3.3 Package power rating. The package power rating shall be 1.2 watts maximum at 70C. For temperatures in excess of 70C, p
21、ower rating shall be derated in accordance with MIL-PRF-914. 3.3.4 Power conditioning. Power conditioning shall be in accordance with MIL-PRF-914 at 1.5 times rated power specified for individual resistors (see 3.3.2). 3.3.5 Temperature range. The operating temperature range shall be -55C to +125C.
22、3.3.6 Resistance temperature characteristic. The resistance temperature characteristic shall be in accordance with MIL-PRF-914. 3.3.7 TC tracking. The TC tracking shall be 10 ppm/C. 3.3.8 Resistance range. The resistance range shall be from 10 ohms to 100 kilohms. 3.3.9 Operating voltage. The maximu
23、m operating voltage shall be 50 V dc. 3.3.10 Solderability. When resistors are tested as specified in 4.5, there shall be no evidence of electrical or mechanical damage. 3.3.10.1 Failure criteria for leadless packages. The criteria for acceptable solderability during evaluation of the terminations a
24、re: a. The total surface area of the dipped part of the termination is at least 95 percent covered by a continuous new solder coating. b. Pinholes, voids, porosity, nonwetting, or dewetting are not concentrated in one area and do not exceed 5 percent of the total metallized termination area. c. Ther
25、e shall be no solder bridging between any termination area and any other termination area not connected to it by design. In the event that the solder dipping causes bridging, the test shall not be considered a failure provided that a local application of heat (i.e., gas, soldering iron, or redipping
26、) results in solder pullback and no wetting of the dielectric area is indicated by microscope examination at a magnification of between 10x and 20x. That area of the surface to be tested as specified in 4.5c shall include the total metallized area of both the castellations and the terminal pads. In
27、case of a dispute, the percentage of coverage with pinholes or voids shall be determined by actual measurement of these areas, as compared to the total area. 3.4 Environmental characteristic. The environmental characteristics shall be in accordance with MIL-PRF-914 characteristic C, H, R, or V (see
28、3.3.6). 3.5 Marking. Marking shall be in accordance with MIL-STD-1285, except the PIN shall be as specified in 1.2, with the manufacturers CAGE number or trade mark and date code. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER,
29、 COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 87015 REV F PAGE 6 3.6 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the
30、 operational and maintenance requirements, and promotes economically advantageous life cycle costs. * 3.7 Manufacturer eligibility. To be eligible for listing as a approved source of supply, a manufacturer shall be listed on the MIL-PRF-914 Qualified Products List for at least one part, or perform t
31、he group A and group B inspections specified herein on a sample agreed upon by the manufacturer and DLA Land and Maritime-VAT. * 3.7.1 Certificate of compliance. A certificate of compliance shall be required from manufacturers requesting to be listed as an approved source of supply. 3.8 Workmanship.
32、 Resistors shall be uniform in quality and free from any defects that will affect life, serviceability, or appearance. 4. VERIFICATION 4.1 Product assurance program. The product assurance program specified in MIL-PRF-914 and maintained in accordance with MIL-STD-790 is not applicable to this documen
33、t. 4.2 Qualification inspection. Qualification inspection is not applicable to this document. 4.2.1 Failure rate qualification. The failure rate qualification specified in MIL-PRF-914 is not applicable to this document. 4.3 Conformance inspection. 4.3.1 Inspection of product for delivery. Inspection
34、 of product for delivery shall consist of group A and group B inspections of MIL-PRF-914. 4.3.2 Certification. The acquiring activity, at its discretion, may accept a certificate of compliance with group B requirements in lieu of performing group B tests (see 6.2d). 4.4 Inspection of packaging. Insp
35、ection of packaging shall be in accordance with MIL-PRF-914. 4.5 Solderability. Solderability shall be in accordance with method 208 of MIL-STD-202. The following details shall apply: a. Application of flux. Flux type shall be in accordance with MIL-PRF-914. Terminations shall be immersed in the flu
36、x, which is at room ambient temperature, to the minimum depth necessary to cover the surface to be tested. The terminations shall be completely immersed by individually dipping each edge with the Y1 axis 30 degrees to 45 degrees from vertical. The terminations to be tested shall be immersed in the f
37、lux for a period of 5 seconds to 10 seconds. b. Solder dip. The dross and burned flux shall be skimmed from the surface of the molten solder. (NOTE: May not require separate operation in wave or flow pot). The molten solder shall be maintained at a uniform temperature of 245C 5C. The surface of the
38、molten solder shall be skimmed again prior to immersing the terminations in the solder. The part shall be attached to a dipping device and the flux covered terminations immersed one side at a time, in molten solder to the depth, and in the same manner specified in 4.5a. The immersion and emersion ra
39、tes shall be 1.000 .250 inch per second and dwell time in the solder bath shall be 5.0 seconds 0.5 second. After the dipping process, the part shall be allowed to cool in air. Residue flux shall be removed from the terminations by rinsing in a suitable solvent. If necessary, a soft cloth or cotton s
40、wab moistened with clean 91 percent isopropyl alcohol shall be used to remove all remaining flux. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DEFENSE SUPPLY CENTER, COLUMBUS COLUMBUS, OHIO SIZE A CODE IDENT NO. 14933 DWG NO. 87015 REV F PAGE 7 c.
41、 Examinations of terminations. After each dip coated termination has been thoroughly cleaned of flux, the castellation and pad shall be examined using a magnification between 10x and 20x. 4.6 Visual and mechanical examination. Resistors shall be examined to verify that the materials, design, constru
42、ction, physical dimensions, marking, and workmanship are in accordance with the applicable requirements of MIL-PRF-914. 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
43、 be performed by DoD personnel 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 Points packaging activity within the Military Department or Defense
44、Agency, or within the military services system commands. Packaging data retrieval is available from the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity. 6. NOTES (This section contains information of a g
45、eneral or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use. Resistor networks are used in surface mounting applications where space is a major concern. 6.2 Ordering data. The contract or purchase order should specify the following: a. Complete PIN (see 1.2). b. Require
46、ments for delivery: One copy of the conformance inspection data or certification of compliance that parts have passed conformance inspection with each shipment of parts by the manufacturer. c. Requirements for packaging and packing. (i.e. ESD sensitive packaging). d. Whether the manufacturer perform
47、s the group B tests or provides certification of compliance with group B requirements (see 4.3.2). 6.3 PIN supersession. PINs in the original 87015 and revision A have been superseded by a new PIN in revision B that includes a characteristic code to differentiate between hermetically and nonhermetic
48、ally sealed resistor networks. Table I illustrates a generic PIN substitution: TABLE I. PIN supersession. 87015 and 87015A 87015B Nonhermetic 87015B Hermetic 87015-* 87015-*V 87015-*H 87015-*C * 6.4 Electrostatic charge. Under several combinations of conditions, these resistors can be electrically d
49、amaged, by electrostatic charges, and drift from specified value. Users should consider this phenomena when ordering or shipping resistors. Direct shipment to the Government is controlled by MIL-DTL-39032 which specifies a preventive packaging procedure. Provided by IHSNot for ResaleNo reproduction or networking permitted wi
