Crystal Units NX2520SG For Mobile Communications ■ Features 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. ■ Specifications Model Item Nominal frequency NX2520SG 19.2 to 54 MHz Overtone order Fundamental Frequency tolerance (30°C) ±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 μW (Max. 100 μW) Load capacitance 7 pF ■ How to Specify an Order 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/). ■ Dimensions mm 2.5±0.1 Terminal land connections (TOP VIEW) #3 2.0.±0.1 #4 #4 #1 #3 #2 #1 Nominal frequency (MHz) Equivalent Series Resistance max. [Ω] 19.2 to 20 70 20 to 40 50 40 to 54 40 #2 0.90±0.10 Terminal #1, #3 : X’ tal #4 : Thermistor #2 : Thermistor & GND (0.8) (0.65) #1 *2 Equivalent Series Resistance (0.8) Land pattern (Typical) 1.7 #2 1.0 (0.65) 1.3 C0.3 C0.3 #4 #3 1.2 -1- 12A_0906_NX2520SG_e