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HC-49/S1. SCOPE
CRYSTAL UNITThis specification shall cover the characteristics of crystal unit withHC-49/U 3.579545—27.00MHz2. ELECTRICAL SPECIFICATION
ITEM
HOLDER TYPE
NOMINAL FREQUENCYLOAD CAPACITANCEOSCILLATION MODE
FREQUENCY TOLERANCE AT 25℃±2℃EQUIVALENT SERIES RESISTANCEDRIVE LEVEL
OPERATING TEMPERATURE RANGEFREQUENCY STABILITYSHUNT CAPACITANCEAGING
INSULATION RESISTANCE
SPECIFICATIONHC-49/U
3.579545—27.00MHz10PF to seriesFundamental±30PPM
Based on frequency0.5 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.comTel:(852)2341 9276 Fax:(852)2797 8153E-mail: wsccltd@hkstar.com
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HC-49/S4. MECHANICAL SPECIFICATION
CRYSTAL UNIT1) 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: 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.
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HC-49/S5. ENVIRONMENTAL SPECIFICATION
CRYSTAL UNIT1) 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 -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: Temperature +85℃±20℃
Length of test 96 hours Results: 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.
