INCH-POUND
MIL-PRF-55310/28C
15 October 2008
SUPERSEDING
MIL-PRF-55310/28B
13 June 2005
PERFORMANCE SPECIFICATION SHEET
OSCILLATOR, CRYSTAL CONTROLLED, TYPE 1 (CRYSTAL OSCILLATOR (XO)),
1.0 MHz THROUGH 85 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.
Pin number Function
1 Enable/disable
2 GND
3 Output
4 B+
Inches mm Ltr
A N/A .560 N/A 14.22
B N/A .360 N/A 9.14
C .195 .205 4.95 5.21
D .086 .114 2.18 2.90
E .025 .055 .635 1.40
F N/A .378 N/A 9.60
G .292 .308 7.42 7.82
H .007 .009 .178 .229
J N/A .188 N/A 4.78
K .015 .021 .381 .533
Min Max Min Max
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.
FIGURE 1. Dimensions and configuration.
AMSC N/A FSC 5955
MIL-PRF-55310/28C
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
Weight: 3 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.
Output voltage:
Logic 1: 2.4 V dc minimum at 400 μA source.
Logic 0: 0.5 V dc maximum with 16 mA sink.
Rise and fall times: See table I.
Duty cycle: See table I.
Supply voltage: +5 V dc ±10 percent.
Input current: See table I.
Enable/disable:
Output disabled (high impedance): Pin 1 input ≤ 0.8 V dc.
Output active: Pin 1 input ≥ 2.0 V dc or open.
Output frequency: Frequency as designated at time of acquisition (see table I).
Initial accuracy at reference temperature (up to 30 days after shipment): See table I.
-8
atm cc/s.
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MIL-PRF-55310/28C
TABLE I. Dash numbers and operating characteristics.
Dash
number
01 1.000 MHz to
04 1.000 MHz to
11 15.000 MHz to
14 15.000 MHz to
21 30.000 MHz to
24 30.000 MHz to
31 60.000 MHz to
34 60.000 MHz to
Output
frequency
range
14.999 MHz
14.999 MHz
29.999 MHz
29.999 MHz
59.999 MHz
59.999 MHz
85.000 MHz
85.000 MHz
Input
current
max
/
1
10 mA 5 ns 45% to 55% 10 TTL
10 mA 5 ns 45% to 55% 10 TTL
15 mA 5 ns 40% to 60% 10 TTL
15 mA 5 ns 40% to 60% 10 TTL
25 mA 3 ns 40% to 60% 10 TTL
25 mA 3 ns 40% to 60% 10 TTL
40 mA 3 ns 40% to 60% 10 TTL
40 mA 3 ns 40% to 60% 10 TTL
1/ Maximum input current for no load condition. Actual configuration of TTL loads must be added to determine
power supply requirements.
2
/ A TTL unit load is defined as: 1.6 mA sink, 0.04 mA source, and 2 pF capacitance.
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
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 a
minimum of 30 days (see table I).
±10 ppm per year, maximum
±1.5 ppm per 30 days.
±3 ppm per 90 days.
Terminal strength: Method 211 of MIL-STD-202, test condition A.
Applied force: 8 ounces each terminal.
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 (f
) instead of to the nominal frequency (f
ref
Pulse characteristics Frequency-temperature
Rise
and fall
times
(max)
Duty cycle at
1.4 V
Load
(max)
/
2
Initial
accuracy
ppm at
+23°C
±1°C
±15 ppm ±50
±25 ppm ±100
±15 ppm ±50
±25 ppm ±100
±15 ppm ±50
±25 ppm ±100
±15 ppm ±50
±25 ppm ±100
-55°C
to
+125°C
A B C
ppm
ppm
ppm
ppm
ppm
ppm
ppm
ppm
tolerance (ppm)
/
).
nom
-55°C
to
+105°C
±40
ppm
±80
ppm
±40
ppm
±80
ppm
±40
ppm
±80
ppm
±40
ppm
±80
ppm
-20°C
to
+70°C
±25
ppm
±50
ppm
±25
ppm
±50
ppm
±25
ppm
±50
ppm
±25
ppm
±50
ppm
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MIL-PRF-55310/28C
Frequency-environmental tolerance: Not applicable.
Vibration, sinusoidal: In accordance with MIL-PRF-55310 and method 204 of MIL-STD-202.
Nonoperating: Test condition D.
Operating: Not required.
Ambient pressure:
Nonoperating: In accordance with MIL-PRF-55310.
Operating: Method 105 of MIL-STD-202, test condition C.
Exposure time: 5 minutes.
Reflow soldering: Reflow soldering of the unit at +230°C ±10°C for 15 seconds shall not degrade the performance.
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
M55310/28
- 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.
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MIL-PRF-55310/28C
Custodians: Preparing activity:
Army - CR Army - CR
Navy - EC
Air Force - 99 Agent:
DLA - CC DLA - CC
Review activities: (Project 5955-2008-008)
Army - AR, MI, SM
Navy - AS, CG, MC
Air Force - 19, 84
NASA - NA
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
.
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