Crystal Oscillator Model Name NH25M22WE Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment n Main Application l Mobile communication base station l Exchanger l Measuring instrument l High-end router l Synthesizer n Features l Compact, with a low height. l A surface-mount (SMD) package. l Reflow soldering is possible. l Excellent phase noise characteristics. l Excellent aging characteristics. n Specifications Item Model Measurement condition NH25M22WE Standard nominal frequency (MHz) 19.44 Power supply voltage DC +3.3V Power consumption 2.4 W max. at the start and 1.2 W max. when stable (+25°C) Output level HCMOS (VOL : 0.4V max., VOH : 2.4V min.) Load 10kΩ//15pF Duty Cycle (1/2Vcc) 40 to 60% Frequency stability Operating temperature range −10 to +70°C Frequency warm-up characteristic +25°C three minutes after power is on Aging ±500×10−9 max. Based on frequency after 30 days operation ±10×10−9/day max. Based on frequency after 30 days operation ±500×10−9/year max. Frequency / temperature characteristic −10 to +70°C ±100×10−9 max. Power supply variation characteristics DC +3.3V±5% ±20×10−9 max. Frequency control characteristic 0 to +2.8 V, positive polarity ±2.0×10−6 min. n Reference Value Offset frequency dBc/Hz −65 max. 1 Hz Phase noise (@19.44MHz) 10 Hz −95 max. 100 Hz −120 max. 1k Hz −125 max. 10k Hz −130 max. The value of phase noise changes when the frequency changes. n List of Options n Dimensions Power supply voltage 8.9±0.1 PIN Connections #1 #2 #3 #4 #5 25.4 8.9±0.1 VCONT NC VCC OUTPUT GND DC +5V Nominal frequency (MHz) 10 to 38.88 For details of options, please feel free to contact our sales representatives. 2.5 #2 #3 2.5 #1 10.5 (1.0) 22 #5 #4 Tolerance ±0.2mm n List of Ordering Codes Frequency (MHz) Ordering Code 19.44 NH25M22WE-19.44M-NSA3417A The above frequencies are NDK’ s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. co48_080418_NH25M22WE_e1