1、 INCH-POUND AMSC N/A FSC 5955 MIL-PRF-3098/118E 11 July 2011 SUPERSEDING MIL-PRF-3098/118D 27 July 2005 PERFORMANCE SPECIFICATION SHEET CRYSTAL UNIT, QUARTZ, CR139/U This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring th
2、e product described herein shall consist of this specification sheet and MIL-PRF-3098. Pertinent characteristics: 20 MHz to 22 MHz; fundamental; noncontrolled; antiresonance. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Marking to be in accorda
3、nce with MIL-PRF-3098. FIGURE 1. Crystal unit - CR139/U. Ltr Inches mm Min Max Min Max A - .402 - 10.21 B - .183 - 4.65 C - .435 - 11.05 D .184 .200 4.67 5.08 E - .530 - 13.46 F .50 - 12.7 - G - .150 - 3.81 H .015 .019 0.38 0.48 Copyright Communications - Electronics Command Provided by IHS under li
4、cense with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/118E 2 REQUIREMENTS: Dimensions, marking, and configuration: See figure 1. Frequency range: 20 MHz to 22 MHz, inclusive. Frequency tolerance: 50 ppm. Mode of oscillation: Fundamental. Opera
5、ting temperature range (noncontrolled): -55C to +105C, inclusive. Rated drive level: 1.0 mW, maximum. Capacitance, shunt: 12.0 pF, maximum. Antiresonance load capacitance: 30.0 pF 0.5 pF. Equivalent resistance: 40 ohms, maximum. Shock: Frequency change permitted: 5 ppm. Equivalent resistance change
6、permitted: 10 percent. Vibration: Method 201 of MIL-STD-202. Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. Thermal shock: Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. Aging: Frequency change permitted: 5 ppm. Part or
7、Identifying Number (PIN): For Product Level B, PIN shall be CR139/U or CR139B/U (followed by specified frequency). For Product Level S, PIN shall be CR139S/U (followed by specified frequency), see 1.2 of MIL-PRF-3098. Reference documents. In addition to MIL-PRF-3098, this document references the fol
8、lowing: MIL-PRF-202 The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors ar
9、e cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking
10、permitted without license from IHS-,-,-MIL-PRF-3098/118E 3 Custodians: Preparing activity: Army - CR Army - CR Navy - EC Air Force - 99 Agent: DLA - CC DLA - CC Review activities: (Project 5955-2011-007) Air Force - 84 NOTE: The activities listed above were interested in this document as of the date
11、 of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.daps.dla.mil. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
