HC-49/S
1. SCOPE
CRYSTAL UNIT
This specification shall cover the characteristics of crystal unit with
HC-49/U 3.579545—27.00MHz
2. ELECTRICAL SPECIFICATION
ITEM
HOLDER TYPE
NOMINAL FREQUENCY
LOAD CAPACITANCE
OSCILLATION MODE
FREQUENCY TOLERANCE AT 25℃±2℃
EQUIVALENT SERIES RESISTANCE
DRIVE LEVEL
OPERATING TEMPERATURE RANGE
FREQUENCY STABILITY
SHUNT CAPACITANCE
AGING
INSULATION RESISTANCE
SPECIFICATION
HC-49/U
3.579545—27.00MHz
10PF to series
Fundamental
±30PPM
Based on frequency
0.5 MW
-20℃~+70℃
±30PPM
<7PF
±5PPM/YEAR
>500MΩ at DC 100V
3. DIMENSION
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage:
http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com
HC-49/S
4. MECHANI
CAL SPECIFICATION
CRYSTAL UNIT
1) Terminal Strength
* Lead pulling test
Conditions: Load
907.2 gram
Direction
To the downward
Duration of applied force
5 seconds
Results:
There should be no distortion in appearance.
*
Lead bending test
Conditions: Load
453.6 gram
Bending angle
90°to normal position
Rate of bending
3 seconds in each cycle
Number of bending
3
Results:
There should be no distortion in appearance.
2) Lead solder ability test
Conditions: Dipping in solder(+230℃±5℃)for 5 seconds
Results:
More than 95% of surface being tested should be
coated uniformly with solder.
3) Vibration test
Conditions:
Results:
Frequency
10 – 55Hz
Amplitude
0.762mm
Sweep
1.0 minute
Duration
2 hours
Frequency and wave form of tested products must
Remain within specifications.
4) Drop test
Conditions:
Results:
Method of drop
Natural drop
Dropping floor
Hard wood board
Height
30cm
Number of drops
3 times
Frequency and wave form of tested products must
remain within specifications.
HC-49/S
5. ENVIRONMENTAL SPECIFICATION
1) Temperature test
* Temperature cycling test
Conditions: Steps of cycle
CRYSTAL UNIT
Results:
1) At -55℃,30 minutes
2) At +25℃,10 - 15 minutes
3) At +85℃,30 minutes
4) At +25℃,10 - 15 minutes
Number of cycles
3 times
Frequency and wave form of tested products must
remain within specifications.
*
Low Temperature test
Conditions:
Temperature
-20℃±2℃
Length of test
96 hours
Results:
There should be no stain on surface of products.
Frequency and wave form of tested products must
remain within specifications.
2) Aging test
Conditions:
Results:
Temperature
+85℃±20℃
Length of test
96 hours
Deviation of frequency must be less than
±3ppm
3) Salt spray test
Conditions:
Temperature
+35℃±2℃
Length of test
48 hours
NaCI %
5%
Results:
There should be no stain on surface of products.
4) Humidity test
Conditions: Temperature
+40℃±2℃
Relative humidity
90 - 95%
Length of test
96 hours
Results:
a. Insulation resistance must be 500 MΩ/100 Vac. minimum
b. Resistance and wave form must remain within specifications.
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