1、 MIL-PRF-3098/21H 05 March 2010 SUPERSEDING MIL-PRF-3098/21G 19 December 2003 PERFORMANCE SPECIFICATION SHEET CRYSTAL UNIT, QUARTZ, CR42/U This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein
2、shall consist of this specification sheet and MIL-PRF-3098. Pertinent characteristics: 90 kHz to 250 kHz; fundamental; controlled; antiresonance. FIGURE 1. Crystal unit - CR42/U. AMSC N/A FSC 5955 INCH POUND Copyright Communications - Electronics Command Provided by IHS under license with CRAINot fo
3、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/21H 2 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 un
4、it - CR42/U - Continued. Ltr Inches mm Min Max Min Max A - .352 - 8.94 B - .725 - 18.42 C .030 .037 0.76 0.94 D .478 .494 12.14 12.55 E - .757 - 19.23 F .030 .040 0.76 1.02 G .015 .025 0.38 0.64 K .223 .248 5.66 6.30 H - .317 - 8.05 J - 1.526 - 38.76 L .048 .052 1.22 1.32 M .075 .141 1.91 3.58 N .01
5、5 .025 0.38 0.64 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/21H 3 REQUIREMENTS: Dimensions, marking, and configuration: See figure 1. Frequency range: 90 kHz to
6、250 kHz, inclusive. Capacitance, shunt: See table I. Frequency tolerance: Operating temperature range: 30 parts per million (ppm). Frequency stability: 20 ppm. Equivalent resistance: 90 kHz to 170 kHz: 4,500 ohms, maximum. 170+ kHz to 250 kHz: 5,000 ohms, maximum. Mode of oscillation: Fundamental. R
7、ated drive level: 1.0 mW, maximum. Antiresonance, load capacitance: 32.0 pF 0.5 pF. Temperature ranges: Operable: -55C to +70C, inclusive. Operating (controlled): +70C to +80C, inclusive. Reference temperature: +75C 1C. Shock (specified pulse): Frequency change permitted: +5 ppm, -10 ppm. Equivalent
8、 resistance change permitted: 15 percent. Vibration: Method 201 of MIL-STD-202, amplitude 0.015 inch (0.030 inch total excursion). Frequency change permitted: +5 ppm, -10 ppm. Equivalent resistance change permitted: 15 percent. Thermal shock: Frequency change permitted: +5 ppm, -10 ppm. Equivalent r
9、esistance change permitted: 15 percent. Bond strength: 90 kHz to 170 kHz: 800 grams, minimum. 170+ kHz to 250 kHz: 700 grams, minimum. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-
10、,-,-MIL-PRF-3098/21H 4 TABLE I. Capacitance, shunt. 1/ The letter “f” represents specified frequency in kHz. A capacitance tolerance of 15% is permitted. Part or Identifying Number (PIN): CR42/U (followed by specified frequency), see 1.2 of MIL-PRF-3098. Referenced documents. In addition to MIL-PRF-
11、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 Government assumes no liability whatsoever for any inaccuracies in thes
12、e 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. Custodians: Preparing activity: Army - CR Army - CR Navy - EC Air force - 99 Agent: DLA - C
13、C DLA - CC Review activities: (Project 5955-2009-040) 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 info
14、rmation above using the ASSIST Online database at https:/assist.daps.dla.mil. Frequency range, inclusive Capacitance kHz 90 to 170 170+ to 250 pF 1/ 450 + 1.2 f 322 + 1.2 f Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
