MIL-PRF-3098/90C
REQUIREMENTS:
Dimensions, marking, and configuration: See figure 1.
Frequency range: 2.9 MHz to 3.85 MHz, inclusive.
Frequency tolerance:
Operating temperature range: ±0.005 percent.
Mode of oscillation: Fundamental.
Operating temperature range (noncontrolled): -55C to +105C, inclusive.
Capacitance, load: 32.0 pF ±.05 pF.
Resonance: Series.
Rated drive level: 1.0 mW, maximum.
Calibration values:
Resistance: 100 ohms.
Crystal current: 3.2 mA.
Capacitance, shunt: 7 pF, maximum.
Equivalent resistance: 300 ohms, maximum.
Shock: Method 202, MIL-STD-202.
Frequency change permitted: ±0.0005 percent.
Equivalent-resistance change permitted: ±15 percent.
Vibration: Method 204, MIL-STD-202, test condition A; .10 inch (2.54 mm) double amplitude or 5
gravity units, whichever is less.
Frequency change permitted: ±0.0005 percent.
Equivalent-resistance change permitted: ±15 percent.
Unwanted modes: Minimum unwanted mode effective resistance shall be at least twice that of the main
mode, or greater, over the operating temperature range -55C to +105C.
Aging:
Frequency change permitted: ±0.0005 percent.
Reference documents. In addition to MIL-PRF-3098, this document references the following:
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.
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