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1. SCOPE
This specification shall cover the characteristics of crystal unit with
HC-49/S 3.579545—27.00MHz
2. ELECTRICAL SPECIFICATION
ITEM SPECIFICATION
HOLDER TYPE HC-49/S
NOMINAL FREQUENCY 3.579545—27.00MHz
LOAD CAPACITANCE 10PF to series
OSCILLATION MODE Fundamental
FREQUENCY TOLERANCE AT 25℃±2℃±3PPM
EQUIVALENT SERIES RESISTANCE Based on frequency
DRIVE LEVEL 0.5mW
OPERATING TEMPERATURE RANGE
FREQUENCY STABILITY
SHUNT CAPACITANCE <7PF
AGING
INSULATION RESISTANCE
-10℃~+60℃
±30PPM
±5PPM/YEAR
>500MΩ at DC 100V
3. Dimension
H=3.5mm
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
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4. MECHANI
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 solderability test
Conditions: Dipping in solder(+230℃±5℃)for 5 seconds
Results: More than 95% of surface being tested should be
coated uniformly with solder.
CAL SPECIFICATION
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.