crystal units - 7 - 1604b_nx2520sg_e nx2520sg for mobile communications crystal unit with built-in thermistor construction. minimize circuit design space by combining crystal unit into one component. (presently, crystal unit and temperature sensor is mounted in one board separately.) placing temperature sensor(thermistor) close to crystal blank in one airtight housing can detect more precise crystal blank temperature. improvement on frequency temperature compensation compared to present crystal unit. single cavity housing which is ideal to module applications. lead-free. meets the requirements for re-fow profling using lead-free solder . *2 equivalent series resistance nominal frequency (mhz) equivalent series resistance max. [] 19.2 to 20 70 20 to 40 50 40 to 54 40 features item model nx2520sg nominal frequency 19.2 to 54 mhz overtone order fundamental frequency tolerance (30 3c ) 10 10 ?6 frequency versus temperature characteristics (with reference to +30 c) 12 10 ?6 operating temperature range ?30 to +85 c storage temperature range ?40 to +85 c equivalent series resistance refer to *1 level of drive 10 w (max. 100 w) load capacitance 7 pf specifcations number std-ctx-1 specifcations mm 2.0.0.1 0.900.10 (0.8) (0.65) c0.3 c0.3 #3 #4 #1 #2 #3 #4 #1 #2 2.50.1 (0.65) (0.8) 1.7 1.3 1.2 1.0 land pattern (typical) terminal land connections (top view) #3 #4 #1 #2 terminal #1, #3 : x tal #4 : thermistor #2 : thermistor & gnd dimensions ntc thermistor for temperature sensor resistance [r25] 100k 1 % b-constant [b25-50] 4250k 1 % please specify the model name, frequency, and specifcation number when you order products. for further questions regarding specifcations, please feel free to contact us.
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