INCH-POUND MIL-PRF-55310/21G 14 November 2008 SUPERSEDING MIL-PRF-55310/21F 09 June 2008 PERFORMANCE SPECIFICATION SHEET OSCILLATOR, CRYSTAL CONTROLLED, TYPE 1 (CRYSTAL OSCILLATOR (XO)), 1.0 MHz THROUGH 60.0 MHz, HERMETIC SEAL, SQUARE WAVE, TTL This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described herein shall consist of this specification sheet and MIL-PRF-55310. FIGURE 1. Dimensions and configuration. AMSC N/A FSC 5955 MIL-PRF-55310/21G Pin number 1-9 10 11 12 13 14-19 20 Function NC B- (GND/CASE) OUTPUT NC B+ (see note 5) NC B+ (optional) (see note 5) Ltr A b c D E e L Q Inches Min Max --.120 .010 .022 .005 .015 --.650 --.650 .045 .055 1.250 ----.060 mm Min --0.25 0.13 ----1.14 31.75 --- Max 3.05 0.56 0.38 16.51 16.51 1.40 --1.52 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are given for general information only. 3. Unless otherwise specified, tolerances are ±.005 (0.13 mm) for three place decimals and ±.02 (0.5 mm) for two place decimals. 4. The leads shall be symmetrical with respect to the package so that the spacing between the first lead and the end of the package shall be equidistant on each side. 5. Unit shall meet all requirements with pin 13 and pin 20 simultaneously tied to supply voltage. 6. Lead numbers are for reference only and need not be marked on unit. 7. All pins with NC function may be connected internally and are not to be used as external tie points or connectors. FIGURE 1. Dimensions and configuration. REQUIREMENTS: Interface and physical dimensions: See figure 1. Mounting: See figure 1. Pads: See figure 1. Seal: Hermetic in accordance with MIL-PRF-55310, maximum leakage rate 5 x 10-8 atm cc/s. Weight: 4 grams, maximum. Oscillator: Class 2 or any class 1 or class 3 oscillator meeting all class 2 requirements and verification tests specified herein and in MIL-PRF-55310. Calibration: Manufacturer calibrated. Screening: In accordance with MIL-PRF-55310, product level B or S, as applicable. Temperature: Operating: See table I. Storage: -62°C to +125°C. Oscillator load: Standard TTL loads (see table I). Output waveform: Symmetrical square wave. 2 MIL-PRF-55310/21G Supply voltage: 5.0 V dc ±10 percent. Input current: At designated supply voltage (see table I). Output frequency: Frequency as designated at time of acquisition (see table I). Output voltage: At designated TTL load (see table I). Logic 1: 2.4 V dc, minimum. Logic 0: 0.5 V dc, maximum. Rise and fall times: See table I. Duty cycle: See table I. Initial accuracy at reference temperature (up to 30 days after shipment): See table I. Initial frequency-temperature accuracy (one-half temperature cycle): Verification applicable. 1/ Frequency-temperature tolerance (one-half temperature cycle, referenced to frequency measured at +23°C ±1°C, immediately prior to starting of the test): See table I. Measurements taken at ten equally spaced increments over the specified operating temperature range. 1/ 1/ For the purpose of transitioning this device to MIL-PRF-55310, ‘Frequency stability versus temperature’ has been renamed ‘Frequency-temperature tolerance’. The verification requirements of ‘initial frequency-temperature accuracy (one-half temperature cycle)’ shall apply except that frequency measurements shall be referenced to the frequency measured at +23°C ±1°C (fref) instead of to the nominal frequency (fnom). 3 MIL-PRF-55310/21G TABLE I. Dash numbers and operating characteristics. Dash number 01 02 03 11 12 13 21 22 23 1/ 2/ Output frequency range 1.0 MHz to 5.0 MHz 1.0 MHz to 5.0 MHz 1.0 MHz to 5.0 MHz 5.0 MHz to 20.0 MHz 5.0 MHz to 20.0 MHz 5.0 MHz to 20.0 MHz 20.0 MHz to 60.0 MHz 20.0 MHz to 60.0 MHz 20.0 MHz to 60.0 MHz Input current max at 5.25 V ±1% 1/ Pulse characteristics Initial accuracy ppm at +23°C ±1°C Rise and fall times max Duty cycle at 1.4 V mA 70 ns 15 percent 40 to 60 10 TTL ±15 70 15 40 to 60 10 TTL 70 15 40 to 60 30 15 30 Load max 2/ Frequency aging ppm/year after 30 days Frequency-temperature tolerance (ppm) -55°C -55°C -20°C to to to +125°C +105°C +70°C A B C ±10 ±50 ±40 ±25 ±25 ±10 ±100 ±75 ±50 10 TTL ±25 ±10 ±200 ±150 ±100 40 to 60 10 TTL ±15 ±10 ±50 ±40 ±25 15 40 to 60 10 TTL ±25 ±10 ±100 ±75 ±50 30 15 40 to 60 10 TTL ±25 ±10 ±200 ±150 ±100 65 5 40 to 60 6 TTL ±15 ±10 ±50 ±40 ±25 65 5 40 to 60 6 TTL ±25 ±10 ±100 ±75 ±50 65 5 40 to 60 6 TTL ±25 ±10 ±200 ±150 ±100 Maximum input current for no load condition. Actual configuration of TTL loads must be added to determine power supply requirements. A TTL unit load is defined as: 1.6 mA sink, 0.04 mA source, and 2 pF capacitance. Frequency-voltage tolerance: ±4 ppm maximum for a ±10 percent change in supply voltage. Measurements taken at reference temperature and operating temperature range end points. Frequency aging: Measurements shall be taken at +70°C ±0.2°C at intervals of not more than every 72 hours for 30 days minimum (see table I). ±10 ppm per year, maximum ±1.5 ppm per 30 days. ±3 ppm per 90 days. Frequency-environmental tolerance: Not applicable. Vibration, sinusoidal: In accordance with MIL-PRF-55310 and method 204 of MIL-STD-202. Nonoperating: Test condition G. Operating: Not required. Ambient pressure: Nonoperating: In accordance with MIL-PRF-55310. Operating: Method 105 of MIL-STD-202, test condition C. 4 MIL-PRF-55310/21G Reflow soldering: Reflow soldering of the unit at +230°C ±10°C for 15 seconds shall not degrade the performance. Reflow soldering temperatures shall not be applied to the case but to the ribbon leads only. Part or Identifying Number (PIN): Consists of “M” prefix followed by specification sheet number, a dash and coded alphas, and numeric number. See example: EXAMPLE M55310/21- S 01 A XXXXXXXX M prefix and specification sheet number Product level (S, B, or C) Dash number (see table I) Operating temperature range (A, B, or C) (see table I) Frequency Reference documents. In addition to MIL-PRF-55310, 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 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. Custodians: Air Force - 99 DLA - CC Preparing activity: DLA - CC (Project 5955-2008-004) Review activities: 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 http://assist.daps.dla.mil. 5