HC-49S

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: [email protected] HC-49/S 4. MECHANICAL 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....