INCH-POUND
Pin number
Function
1-5
NC
6
B+
7-11
NC
12
B+
13-33
NC
34
GND
35-39
NC
40
GND
41
NC
42
OUTPUT
Inches
mm
Inches
mm
.007
0.18
.085
2.16
.008
0.20
.472
11.99
.015
0.38
.500
12.70
.025
0.64
.650
16.51
.050
1.27
MIL-PRF-55310/20F
28 August 2012
SUPERSEDING
MIL-PRF-55310/20E
24 February 2005
PERFORMANCE SPECIFICATION SHEET
OSCILLATOR, CRYSTAL CONTROLLED, TYPE 1 (CRYSTAL OSCILLATOR (XO)),
40.0 kHz 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.
NOTES:
1. Dimensions are in inches.
2. Metric equivalents are given for general information only.
3. Unless otherwise specified, toler anc es are ±.005 (0.13 mm) for three place decimals and ±.02 (0.5 mm) for two
place decimals.
4. All pads with NC function may be connected internally and are not to be used as external tie points or
connectors.
FIGURE 1. Dimensions and configuration.
AMSC N/A FSC 5955
MIL-PRF-55310/20F
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: 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.
Output voltage:
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.
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).
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 sh all be refer en ced to
the frequency measured at +23°C ±1°C (f
) instead of to the nominal frequency (f
ref
-8
atm cc/s.
).
nom
2
MIL-PRF-55310/20F
Dash
num-
Output
frequency
Input
current
Pulse characteristics
Initial
accuracy
Frequency
aging
Frequency-temperature
tolerance (ppm)
ber
range
(max) at
1/
Rise
Duty
Load
ppm
±1°C
ppm/year
-55°C
-55°C
-20°C
(max) A B
C
Ma
ns
percent
01
40 kHz
75
15
40 to 60
10 TTL
±15
±25
±10
±10
±50
±200
±40
±150
±25
±100
11
14.0 MHz
30
5
40 to 60
10 TTL
±15
±25
±10
±10
±50
±200
±40
±150
±25
±100
21
30.0 MHz
55
5
40 to 60
10 TTL
±15
±25
±10
±10
±50
±200
±40
±150
±25
±100
TABLE I. Dash numbers and operating charact eri sti cs.
02
03
12
13
22
23
to
14.0 MHz
to
30.0 MHz
to
60.0 MHz
5.25 V
±1%
75
75
30
30
55
55
and
fall
times
15
15
5
5
5
5
cycle at
1.4 V
40 to 60
40 to 60
40 to 60
40 to 60
40 to 60
40 to 60
(max)
2/
10 TTL
10 TTL
10 TTL
10 TTL
10 TTL
10 TTL
at
+23°C
±25
±25
±25
after
30 days
±10
±10
±10
to
+125°C
±100
±100
±100
to
+105°C
±80
±80
±80
to
+70°C
±50
±50
±50
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 2pF 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.
Reflow soldering: Reflow soldering of the unit at +230°C ±10°C for 15 seconds shall not degrade the performance.
3
MIL-PRF-55310/20F
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
M55310/20- 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 sheet 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: Preparing activity:
Air Force - 99 DLA - CC
DLA - CC
(Project 5955-2011-018)
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 https://assist.dla.mil.
4
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