Crystal Oscillator Model Name NH25M22WB 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 Model Item Measurement condition Standard nominal frequency (MHz) NH25M22WB 19.2 Power supply voltage DC +3.3V Power consumption 2.7 W max. at the start and 1.4 W max. when stable (+25°C) Output level HCMOS (VOL : 0.4V max., VOH : 2.4V min.) Load 10kΩ//30pF 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 ±100×10−9/year max. Frequency / temperature characteristic −10 to +70°C ±20×10−9 max. Power supply variation characteristics DC +3.3V±5% ±5×10−9 max. Frequency control characteristic 0 to +2.8 V, positive polarity ±1.0×10−6 min. n Reference Value Offset frequency Phase noise (@19.2MHz) dBc/Hz 1 Hz −70 max. 10 Hz −100 max. 100 Hz −120 max. 1k Hz −135 max. 10k Hz −135 max. The value of phase noise changes when the frequency changes. n Dimensions n List of Options PIN Connections 17.8±0.1 #1 #2 #3 #4 #5 #6 #7 25.4±0.2 7.62±0.1 VCONT VREF VCC OUTPUT ALARM NC GND #2 10 to 20 For details of options, please feel free to contact our sales representatives. #3 12.1±0.2 2.5 22±0.2 #7 #6 DC +5V Nominal frequency (MHz) n List of Ordering Codes 2.5 #1 Power supply voltage #5 #4 Tolerance ±0.2mm Frequency (MHz) Ordering Code 19.2 NH25M22WB-19.2M-NSA3420A The above frequencies are NDK’ s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. co45_080418_NH25M22WB_e1