CRYSTAL UNIT
1.
SCOPE
This specification shall cover the characteristics of crystal unit with
HC-49/U 3.579545--27.00MHz
2. ELECTRICAL SPECIFICATION
ITEM
SPECIFICATION
HOLDER TYPE
HC-49/U
NOMINAL FREQUENCY
3.579545--27.00MHz
LOAD CAPACITANCE
10PF to series
OSCILLATION MODE
Fundamental
FREQUENCY TOLERANCE AT 252
30PPM
EQUIVALENT SERIES RESISTANCE
Based on frequency
DRIVE LEVEL
0.5 MW
OPERATING TEMPERATURE RANGE
-20~+70
FREQUENCY STABILITY
30PPM
SHUNT CAPACITANCE
<7PF
AGING
5PPM/YEAR
INSULATION RESISTANCE
>500M at DC 100V
3.
DIMENSION
Wing Shing Computer Components Co., (H.K.)Ltd.
Tel:(852)2341 9276 Fax:(852)2797 8153
Homepage:
http://www.wingshing.com
E-mail: wsccltd@hkstar.com
HC-49/S
4. MECHANI
CAL SPECIFICATION
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 90to 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(+2305)for 5 seconds
Results: More than 95% of surface being tested should be
coated uniformly with solder.
3)
Vibration test
Conditions: Frequency 10 55Hz
Amplitude 0.762mm
Sweep 1.0 minute
Duration 2 hours
Results: Frequency and wave form of tested products must
Remain within specifications.
4) Drop test
Conditions: Method of drop Natural drop
Dropping floor Hard wood board
Height 30cm
Number of drops 3 times
Results: Frequency and wave form of tested products must
remain within specifications.
HC-49/S
CRYSTAL UNIT
5.
ENVIRONMENTAL SPECIFICATION
1)
Temperature test
* Temperature cycling test
Conditions: Steps of cycle 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
Results: Frequency and wave form of tested products must
remain within specifications.
* Low Temperature test
Conditions: Temperature -202
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: Temperature +8520
Length of test 96 hours
Results: Deviation of frequency must be less than 3ppm
3)
Salt spray test
Conditions: Temperature +352
Length of test 48 hours
NaCI % 5%
Results: There should be no stain on surface of products.
4)
Humidity test
Conditions: Temperature +402
Relative humidity 90 - 95%
Length of test 96 hours
Results: a. Insulation resistance must be 500 M/100 Vac. minimum
b. Resistance and wave form must remain within specifications.
CRYSTAL UNIT
HC-49/S
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