1、 INCH-POUND AMSC N/A FSC 5955 MIL-PRF-3098/120E 11 July 2011 SUPERSEDING MIL-PRF-3098/120D 27 July 2005 PERFORMANCE SPECIFICATION SHEET CRYSTAL UNIT, QUARTZ, CR131/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; controlled; antiresonance. NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. The pin undercut may be om
3、itted. 4. Marking shall be in accordance with MIL-PRF-3098. FIGURE 1. Crystal unit - CR131/U. Ltr Inches mm Min Max Min Max A - .725 - 18.42 B - .352 - 8.94 C - .757 - 19.23 D .460 .476 11.68 12.09 E - .775 - 19.69 F .223 .248 5.66 6.30 G - .317 - 8.05 H .075 .141 1.91 3.58 J .048 .052 1.22 1.32 K .
4、030 .037 0.76 0.94 L .015 .025 0.38 0.64 M .010 .070 0.25 1.78 N .015 .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-3098/120E 2 REQUIREMENTS: Dimensions,
5、marking, and configuration: See figure 1. Frequency range: 0.8 MHz to 20 MHz, inclusive. Frequency stability: 5 ppm. Antiresonance, load capacitance: 30.0 pF 0.5 pF. Frequency and equivalent resistance: See table I. Reference temperature: 75C 1C. Frequency tolerance: 20 ppm. TABLE I. Equivalent resi
6、stance. Frequency range, inclusive Maximum resistance MHz 0.80 to 0.85 Ohms 630 0.85+ to 0.90 600 0.90+ to 1.00 580 1.00+ to 1.12 540 1.12+ to 1.25 490 1.25+ to 1.37 450 1.37+ to 1.50 410 1.50+ to 1.62 380 1.62+ to 1.75 330 1.75+ to 1.87 300 1.87+ to 2.00 290 2.00+ to 2.12 270 2.12+ to 2.25 250 2.25
7、 to 2.60 200 2.60+ to 3.00 150 3.00+ to 3.40 110 3.40+ to 3.75 90 3.75+ to 4.00 75 4.00+ to 5.00 60 5.00+ to 7.00 35 7.00+ to 10.00 24 10.00+ to 15.00 22 15.00+ to 20.00 20 Mode of oscillation: Fundamental. Operable temperature range: -55C to +70C and +80C to +90C, inclusive. Operating temperature
8、range (controlled): +70C to +80C, inclusive. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/120E 3 Rated drive level: 1.0 mW, maximum. Capacitance, shunt: 7.0 pF, ma
9、ximum. Shock (specified pulse): The violation of P = I2R is intentional at the higher resistance of the crystal unit. Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 0.8 MHz to 2.0 MHz 15 percent. 2.0 MHz + to 20.0 MHz 10 percent. Vibration: Method 201 of MIL-STD-202. Freq
10、uency change permitted: 5 ppm. Equivalent resistance change permitted: 0.8 MHz to 2.0 MHz 15 percent. 2.0+ MHz to 20.0 MHz 10 percent. Thermal shock: Frequency change permitted: 5 ppm. Equivalent resistance change permitted: 15 percent. Aging: Frequency change permitted: 5 ppm. NOTE: This crystal un
11、it is identical to the CR27/U, except for a load capacitance rating of 30 pF 0.5 pF. This unit is not interchangeable with the CR27/U. Part or Identifying Number (PIN): For Product Level B, PIN shall be CR131/U or CR131B/U (followed by specified frequency). For Product Level S, PIN shall be CR131S/U
12、 (followed by specified frequency), see 1.2 of MIL-PRF-3098. Reference documents. In addition to MIL-PRF-3098, this document references the following: 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 do
13、ne as a convenience only and the Government 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 pre
14、vious issue. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3098/120E 4 Custodians: Preparing activity: Army - CR Army - CR AF - 99 DLA - CC Agent: Review activities: DLA
15、 - CC Army - AR, MI (Project 5955-2011-008) 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-,-,-
