1. quartz crystal unit specification specifications item symbol min type max units remark 1. production type smd quartz crystal resonator 2. holder smd 4025 seam seal 3. mode of oscillation fundamental 3 overtone 5 overtone 4. frequency fl 27.000000 mhz 5. load capacitance cl 20 pf 6. frequency tolerance tol 20 ppm at 25 3 7. equivalent resistance rs 50 ? max. 8. working temperature range tr -10 70 9. freq. temp. characteristics tc 20 ppm working temperature f 10. drive level dl 100 w 11. shunt capacitance c0 5 pf 12. storage temperature range -40 85 13. insulation resistance 500 m? min. 14. measure circuit s&a 250b network 15. aging 5 ppm/yr max. this product doesn't include harmful s ubstance that stipulated by rohs hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
2. marking & dimensions 2.1 dimensions (unit: mm) hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
2.2 inside structure description 1 quartz blank 2 electrode 3 lid 4 base 5 conductive adhesive 2.3 marking frequency year/moth code : please make reference the form production line code 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 year month 2023 2024 2025 2026 jan a n a n feb b p b p mar c q c q apr d r d r may e s e s jun f t f t jul g u g u aug h v h v sep j w j w oct k x k x nov l y l y dec m z m z 27.000 aker ay hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
3. characteristics units and values indicated with { } in this specification are the former units and the specified values. standard atmospheric conditions: unless otherwise specified, the standard r ange of atmospheric conditions for making measurements and test s is as follows: ambient temperature: 15 to 35 relative humidity : 25% to 85% air pressure : 86 to 106 kpa if there is any doubt about the re sults, measurements shall be m ade within the following limits: ambient temperature : 25 1 relative humidity : 63% to 67% air pressure : 86 to 106 kpa operating temperature range: the operating temperature range is the range of am bient temperatures at which the quartz crystal oscillator can be stored without damage. conditions are as specified elsewhere on these specifications. operating temperature range: -10 to +70 storage temperature range: the storage temperature range is the range of ambient temperatures at which the quartz crystal oscillator can be stored without damage. conditions are as specified elsewhere on these specifications. storage temperature range: -40 to +85 hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
3.1 mechanical characteristics provided that measurement shall be carried out after letting it alone in the room temperature for 1h. item specifications 1 drop test dropping 3 times from the height of 75 cm onto hard wooden board of thickness more than 30mm. 2 mechanical shock devices are shocked to half sine wave (1000 g) three mutually perpendicular axes each 3 times. (1) vibration frequency 10~55hz (2) cycle 1 to 2 min (3) amplitude 1.0mm (4) direction x.y.z 3 vibration (5) time 2hr for each direction 4 solderability mil - std - 20e method 208c temperature 245 5 material h63a (silver 2 ~ 3 %) immersion depth 0.5 mm minimum immersion time 3 0.5 seconds flux rosin resin methyl alcohol solvent ( 1 : 4 ) 5 resistance to soldering heat mil - sld -202, method 210, condition i or j 10 sec immersion into 260 5 solder pot, above 180 is 90 ~ 120 sec. *frequency variation shall be within +/-5ppm and equival ent resistance less than 15% max. after the test. note: measuring the frequency should be done after keepin g test samples at room temperature for 24 hours. hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
3.2 environmental characteristics provided that measurement shall be carried out after letting it alone in the room temperature for 1h. item specifications 1 humidity it alone at 40 2 in humidity of 90~95% for 48h. 2 storage in low temperature it alone at ?40 2 for 240h. 3 storage in high temperature it alone at 85 2 for 240h. 4 temperature cycle the following temperature cycle (10 cycles ). refer to below fig. temperature shift from low to high, high to low shall be done in 1 /min. *frequency variation shall be within +/-5ppm and equival ent resistance less than 15% max. after the test. note: measuring the frequency should be done after keepin g test samples at room temperature for 24 hours. 3.3 suggested ir reflow profile 85+/-5 1 cycle 30 min 2 min 30 min 2 min 25+/-5 -40+/-5 25+/-5 hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
4. packing tape specification (unit : mm) tape dimension hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
5. cover tape adhesion strength 6. note 1. only the lead should be heated when soldering. in case that the package temperature is exceeding 150c , it may impair the crystal or may cause the crystal quartz to destroy. 2. pulling the lead strongly may cause cracking of the hermetic grass seal bending the lead closely from the case may also cause same problem, so when the lead needs to be bent, please leave move than 05.mm of lead from the case. 3. too much shock or vibration is not allowed. acco rding to conditions such as machine shock during the assembly, the internal quartz crystal might be damaged. please check your conditions carefully when using it in advance. 4. don't storage or use in the environm ent that temperature may change rapi dly to avoid the condensation. and also we recommend to storage the products in the normal environment. (temperature, humidity) 5. this product can be subjected to ultrasonic cleaning. however, since the oscillator may be affected depending on the condition, be sure to check it. 6. applying excessive drive level to the quartz crystal may cause deterioration for characteristics or damage. circuit design must be such as to maintain a proper drive level. 7. unless adequate negative resistance is allocated in the oscillation circuit, startup time of oscillation may be increased or no oscillation may occur. in order to avoi d this, provide enough negative resistance in the circuitry design. hcx-4sb(27mhz) smd quartz crystal resonator shenzhen luguang electronic technology co.,l td .
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