1、 INCH-POUND AMSC N/A FSC 5955 MIL-PRF-3098/137D 28 July 2011 SUPERSEDING MIL-PRF-3098/137C 27 July 2005 PERFORMANCE SPECIFICATION SHEET CRYSTAL UNIT, QUARTZ, CR157/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: 0.8 MHz to 20 MHz; fundamental; noncontrolled; series resonance. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. The wire leads shall
3、 be tinned, suitable for soldering. 4. Marking shall be in accordance with MIL-PRF-3098. FIGURE 1. Crystal unit - CR157/U. Ltr Inches mm Min Max Min Max A - .725 - 18.42 B - .352 - 8.94 C - .757 - 19.23 D .478 .494 12.14 12.55 E - .775 - 19.69 F - .50 - 12.7 G - .317 - 8.05 H .028 .032 0.71 0.81 Cop
4、yright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/137D 2 REQUIREMENTS: Dimensions, marking, and configuration: See figure 1. Frequency range: 0.8 MHz to 20 MHz, inclusive.
5、 Frequency tolerance: 50 ppm. Equivalent resistance: See table I. TABLE I. Equivalent resistance. Frequency range, inclusive. MHz. Maximum resistance Ohms 0.80 to 0.85 520 0.85+ to 0.90 480 0.90+ to 1.00 440 1.00+ to 1.12 400 1.12+ to 1.25 380 1.25+ to 1.37 340 1.37+ to 1.50 300 1.50+ to 1.62 280 1.
6、62+ to 1.75 250 1.75+ to 1.87 220 1.87+ to 2.00 190 2.00+ to 2.12 170 2.12+ to 2.25 150 2.25+ to 2.60 130 2.60+ to 3.00 90 3.00+ to 3.40 70 3.40+ to 3.75 52 3.75+ to 4.00 45 4.00+ to 5.00 37 5.00+ to 7.00 25 7.00+ to 10.00 20 10.00+ to 15.00 18 15.00+ to 20.00 15 Mode of oscillation: Fundamental. Op
7、erating temperature range (noncontrolled): -55C to +105C, inclusive. Rated drive level: 1.0 mW, maximum. Resonance: Series. Capacitance, shunt: 7.0 pF, maximum. Shock (specified pulse): 0.8 MHz to 2.0 MHz 2.0 MHz+ to 20.0 MHz Frequency change permitted: 10 ppm 5 ppm Equivalent resistance change perm
8、itted: 15 percent 10 percent Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/137D 3 Vibration: Method 201, MIL-STD-202. 0.8 MHz to 2.0 MHz 2.0 MHz+ to 20.0 MHz Freque
9、ncy change permitted: 10 ppm 5 ppm Equivalent resistance change permitted: 15 percent 10 percent Temperature cycling: 0.8 MHz to 2.0 MHz 2.0 MHz+ to 20.0 MHz Frequency change permitted: 10 ppm 5 ppm Equivalent resistance change permitted: 15 percent 10 percent Aging: Frequency change permitted: 5 pp
10、m. Part or Identifying Number (PIN): For Product Level B, PIN shall be CR157/U or CR157B/U (followed by specified frequency). For Product Level S, PIN shall be CR157S/U (followed by specified frequency, see 1.2 of MIL-PRF-3098. Reference documents. In addition to MIL-PRF-3098, this document referenc
11、es the following: MIL-STD-202 The margins of this specification sheet 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
12、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
13、ities: (Project 5955-2011-014) Army - AR, MI, SM 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-,-,-
