Crystal Units NX1612SB 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. ● External configuration size is 1.6x1.2mm typ., H0.45 mm max. ● A surface-mount crystal oscillator. (Reflow soldering is possible.) ● Lead-free. Meets the requirements for re-flow profiling using lead-free solder. ■ Specifications Model Item Nominal Frequency NX1612SB 26 to 52 MHz Overtone Order Fundamental Frequency Tolerance (25 ± 3°C ) ±10 × 10−6 Frequency versus Temperature Characteristics (with reference to +29 °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 Load Capacitance 7 pF NTC Thermistor for Temperature Sensor Resistance [R25] 100k Ω ± 1 % B-Constant [B25-50] 4250K ± 1 % ■ Dimensions 1.6±0.1 Terminal land connections (TOP VIEW) *1 Equivalent Series Resistance Nominal Frequency (MHz) Equivalent Series Resistance max. [Ω] 26 to 38.4 80 38.4 to 52 50 #3 #4 1.2±0.1 mm COVER #2 0.45 Max. #1 #1,#3: Crystal #2: Thermistor and GND (Connection with cover) #4: Thermistor (0.5) #1 #2 Land pattern (Typical) (0.5) 0.65 0.75 (C0.2) #4 (0.55) #3 (0.55) 0.75 1.05 Please specify the model name, frequency, and specification number when you order products. For further questions regarding specifications, please feel free to contact us. -6- 1604A_NX1612SB_e