1、AMSC N/A FSC 5955 INCH-POUND MIL-PRF-3098/68G 7 January 2010 SUPERSEDING MIL-PRF-3098/68F 12 January 2005 PERFORMANCE SPECIFICATION SHEET CRYSTAL UNIT, QUARTZ, CR91/U This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring t
2、he product described herein shall consist of this specification sheet and MIL-PRF-3098. Pertinent characteristics: 9.5 MHz to 12.5 MHz; fundamental; noncontrolled; antiresonance. FIGURE 1. Crystal unit - CR91/U. Copyright Communications - Electronics Command Provided by IHS under license with CRAINo
3、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/68G 2 Ltr Inches mm Min Max Min Max A - 1.170 - 29.72 B - .460 11.68 C - 1.125 - 28.58 D .091 .095 2.31 2.41 E .490 .510 12.45 12.95 F - .411 - 10.44 G - 1.282 - 32.56 H .625 .655 15.87 16.64 J .568 .588 14
4、.43 14.93 K .123 .127 3.12 3.22 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. The pin undercut may be omitted. 4. Marking to be in accordance with MIL-PRF-3098. FIGURE 1. Crystal unit - CR91/U - Continued. REQUIREMENTS: Dimensions, marking, and
5、configuration: See figure 1. Frequency range: 9.5 MHz to 12.5 MHz, inclusive. 1/ Mode of oscillation: Fundamental. Rated drive level: 1.0 mW maximum. Frequency tolerance (operating temperature range): 50 parts per million (ppm). Equivalent resistance: 25 ohms, maximum. Antiresonance, load capacitanc
6、e: 55.0 pF 0.5 pF. Shock (specified pulse): Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. _ 1/ In using equipment, these frequencies are multiplied to the 12th harmonic, which is also known as aircraft frequency. Copyright Communications - Electronics Command
7、 Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/68G 3 Vibration: Method 201 of MIL-STD-202. Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. Frequency and equivalent resistan
8、ce: Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. Aging: Frequency change permitted: 5 ppm. Part or Identifying Number (PIN): CR91/U (followed by specified frequency), see 1.2 of MIL-PRF-3098. Reference documents. In addition to MIL-PRF-3098, this document re
9、ferences the following: MIL-STD-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 an
10、d contractors are 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. Custodians: Preparing activity: Army - CR Army - CR Navy - EC Air Force - 99 Agent: DLA - CC DLA - CC Review activ
11、ities: (Project 5955-2009-074) Army - AR, MI Navy - AS, MC, SH Air Force - 19, 84 NOTE: The activities listed above were interested in this document as of the date 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-,-,-
