scope:
This specification is approved for use by all Departments
and Agencies of the Department of Defense.
The complete requirements for procuring the crystal unit described herein
shall consist of this document and the latest issue of Specification MIL-C-3098.
Pertinent characteristics: 0.8 to 20 MHz; fundamental; controlled; antiresonance.
TABLE I. Requirements.
Requirement Specified value or condition
-----------------------------------------------------------------------------------
Holder - - - - - - - - - - - - - - - - - - - - - - HC-6/U (MIL-H-10056/2)
Dimensions, marking, and configuration - - - - - - See figure
Frequency range- - - - - - - - - - - - - - - - - - 0.8 to 20 MHz, inclusive
Capacitance, shunt - - - - - - - - - - - - - - - - 7 pF maximum
Frequency tolerances:
Operating temperature range - - - - - - - - - - - ±10 PPM
Room temperature- - - - - - - - - - - - - - - - - ±70 PPM
Frequency stability- - - - - - - - - - - - - - - - ±5 PPM
Equivalent resistance- - - - - - - - - - - - - - - See table II
Antiresonance, load capacitance- - - - - - - - - - 32.0 ±0.2 pF
Mode of oscillation- - - - - - - - - - - - - - - - Fundamental
Reference temperature- - - - - - - - - - - - - - - 75° ±1°C
[D circled] Temperature ranges:
Operable- - - - - - - - - - - - - - - - - - - - - −55° to +70° and +80° to +90°C, inclusive
Operating - - - - - - - - - - - - - - - - - - - - 70° to 80°C, inclusive
Test set, calibration values, and rated drive
level - - - - - - - - - - - - - - - - - - - - - - See table III
Shock (specified pulse):
Frequency change permitted- - - - - - - - - - - - ±5 PPM
Equivalent resistance change permitted- - - - - - ±15 percent
Vibration: 1/
Frequency change permitted- - - - - - - - - - - - ±5 PPM
Equivalent resistance change permitted- - - - - - ±15 percent
[D circled] Thermal shock:
Frequency change permitted- - - - - - - - - - - - ±5 PPM
Equivalent resistance change permitted- - - - - - ±15 percent
Aging:
Frequency change permitted- - - - - - - - - - - - 5 PPM
1/ Method 201 of MIL-STD-202.
TABLE II. Equivalent resistance.
Frequency range, Maximum
inclusive resistance
-------------------------------------------------
MHz Ohms
0.8 to 0.9- - - - - 600
0.9+ to 1 - - - - - 570
1+ to 1.12- - - - - 540
1.12+ to 1.25 - - - 490
1.25+ to 1.37 - - - 450
1.37+ to 1.5- - - - 410
1.5+ to 1.62- - - - 370
1.62+ to 1.75 - - - 330
1.75+ to 1.87 - - - 300
1.87+ to 2- - - - - 290
2+ to 2.12- - - - - 270
2.12+ to 2.25 - - - 240
2.25+ to 2.6- - - - 190
2.6+ to 3 - - - - - 150
3+ to 3.4 - - - - - 110
3.4+ to 3.75- - - - 90
3.75+ to 4- - - - - 75
4+ to 5 - - - - - - 60
5+ to 7 - - - - - - 35
7+ to 10- - - - - - 24
10+ to 15 - - - - - 22
15+ to 20 - - - - - 20
TABLE III. Test set, calibration values, and rated drive level.
Government Band of specified Calibration values
reference frequencies, -------------------------------- Rated
standard inclusive Resistance Crystal Resistor drive
test set current voltage level
drop
-------------------------------------------------------------------------------------
MHz Ohms mA Volt mW
0.8 to 1.5 0 1/ --- 5.0±1.0 2/
1.5+ to 2.25 50 10 --- 5.0 ±1.0
2.25+ to 3.4 50 10 --- 5.0 ±1.0
TS-330/TSM 3.4+ to 5.1 22 15 --- 5.0 ±1.0
5.1+ to 7.5 13 20 --- 5.0 ±1.0
7.5+ to 10 13 20 --- 5.0 ±1.0
10+ to 15 11 15 --- 2.5 ±0.5
TS-683/TSM 15+ to 20 10 --- 0.16 2.5 ±0.5
1/ Set crystal current control at extreme counterclockwise (minimum) position.
2/ The violation of P = I2R is intentional; at the higher resistance of the crystal unit, the
empirical power dissipation will be as rated.
