1、AMSC N/A FSC 5955 INCH-POUND MIL-PRF-3098/55G 7 January 2010 SUPERSEDING MIL-PRF-3098/55F 12 January 2005 PERFORMANCE SPECIFICATION SHEET CRYSTAL UNIT, QUARTZ, CR77/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: 17 MHz to 62 MHz; third mechanical overtone; noncontrolled; series resonance. FIGURE 1. Crystal unit - CR77/U. Copyright Communications - Electronics Command Provided by IHS under licen
3、se with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/55G 2 Ltr Inches mm Min Max Min Max A - .435 - 11.05 B - .183 - 4.65 C - .402 - 10.21 D .027 .032 0.68 0.81 E .184 .200 4.67 5.08 F - .150 - 3.81 G - .530 - 13.46 H .223 .248 5.66 6.30 J .015
4、025 0.38 0.63 K .165 .175 4.19 4.44 L .038 .042 0.96 1.07 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Marking to be in accordance with MIL-PRF-3098. 4. The pin undercut may be omitted. FIGURE 1. Crystal unit - CR77/U - Continued. REQUIREMENTS
5、 Dimensions, marking, and configuration: See figure 1. Frequency range: 17.0 MHz to 62.0 MHz, inclusive. Capacitance, shunt: 7pF, maximum. Frequency tolerances: Primary operating temperature range: 20 parts per million (ppm). Secondary operating temperature range: 30 ppm. Equivalent resistance: 40
6、ohms, maximum. Mode of oscillation: Third mechanical overtone. Drive level, rated: 1.0 mW maximum. Resonance: Series. Operating temperature ranges: Primary: -40C to +90C, inclusive. Secondary: -55C to -40C, and +90C to +105C, inclusive. Copyright Communications - Electronics Command Provided by IHS
7、under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/55G 3 Shock (specified pulse): Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. Thermal shock: Frequency change permitted: 5 ppm. Equivalent re
8、sistance change permitted: 10 percent. Vibration: Method 204 of MIL-STD-202, Test condition A. Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 10 percent. Aging: Frequency change permitted: 5 ppm. Part or Identifying Number (PIN): CR77/U (followed by specified frequency),
9、see 1.2 of MIL-PRF-3098. Reference documents. In addition to MIL-PRF-3098, this document references 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 Gov
10、ernment assumes no liability whatsoever for any inaccuracies in these notations. Bidders and 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. Copyright Communication
11、s - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/55G 4 Custodians: Preparing activity: Army - CR Army - CR Navy - EC Air Force - 99 Agent: DLA - CC DLA - CC Review activities: (Project 5955-
12、2009-064) 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-,-,-
