Crystal Oscillator Model Name NH25M22WD 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) NH25M22WD 12.8 Power supply voltage DC +3.3V Power consumption 2.7 W max. at the start and 1 W max. when stable (+25°C) Output level HCMOS (VOL : 0.4V max., VOH : 2.9V 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 ±300×10−9 max. Power supply variation characteristics DC +3.3V±5% ±50×10−9 max. n Reference Value Offset frequency dBc/Hz 1 Hz Phase noise (@12.8MHz) −60 max. 10 Hz −90 max. 100 Hz −120 max. 1k Hz −130 max. 10k Hz −140 max. The value of phase noise changes when the frequency changes. n List of Options n Dimensions DC +5V Power supply voltage PIN Connections 7.62±0.1 25.4±0.2 #1 #2 #3 #4 #5 #6 #7 NC NC VCC OUTPUT NC NC GND 2.5 8.9 #1 17.8±0.1 #2 #3 2.5 22±0.2 Nominal frequency (MHz) 10 to 38.88 For details of options, please feel free to contact our sales representatives. n List of Ordering Codes Frequency (MHz) Ordering Code 12.8 NH25M22WD-12.8M-NSA3418A 10max The above frequencies are NDK’ s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. #7 #6 #5 #4 Tolerance ±0.2mm co47_080418_NH25M22WD_e1