crystal units - 1 - 12a_0906_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. *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 (30c) 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 when ordering our products, specify them with an ordering code that consists of the following : model name - frequency (max : 9 digits) m - number for specifying an order example NX2520SG-19.200m-std-ctx-1 if you have any queries concerning our standard frequencies and numbers for specifying orders, please contact our sales representatives or visit our homepage (http://www.ndk.com/). how to specify an order 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
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