Crystal Oscillator Model Name NH25M22WA 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. l A surface-mount (SMD) package. l Reflow soldering is possible. l Excellent phase noise characteristics. l Excellent aging characteristics. n Specifications Model Item Measurement condition Standard nominal frequency (MHz) NH25M22WA 32.768 Power supply voltage DC +3.3V Power consumption 3.0 W max. at the start and 1.3 W max. when stable (+25°C) Output level HCMOS (VOL : 0.4V max., VOH : 2.4V min.) Load 10kΩ//15pF Duty Cycle (1/2Vcc) 45 to 55% Frequency stability Operating temperature range Aging −10 to +70°C Based on frequency after 30 days operation ±2×10−9/day max. Based on frequency after 30 days operation ±50×10−9/year max. Frequency / temperature characteristic −10 to +70°C Power supply variation characteristics DC +3.3V±5% ±20×10−9 max. Frequency control characteristic 0 to +2.8 V, positive polarity ±0.9×10−6 min. ±3×10−9 max. n Reference Value Offset frequency dBc/Hz 1 Hz Phase noise (@32.768MHz) −65 max. 10 Hz −95 max. 100 Hz −115 max. 1k Hz −125 max. 10k Hz −140 max. The value of phase noise changes when the frequency changes. n Dimensions 8.9±0.1 n List of Options 8.9±0.1 PIN Connections 7.62±0.1 25.4 #1 #2 #3 #4 #5 #6 #7 VCONT VREF VCC OUTPUT ALARM GND(Heating) GND 2.5 22 #1 #2 #3 15.7 (1.0) 2.5 21.5 #7 #6 #5 #4 Tolerance ±0.2mm Power supply voltage DC +5V Nominal frequency (MHz) 10 to 40 For details of options, please feel free to contact our sales representatives. n List of Ordering Codes Frequency (MHz) Ordering Code 32.768 NH25M22WA-32.768M-NSA3425A The above frequencies are NDK’ s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. co44_080418_NH25M22WA_e1