Crystal Oscillator Model Name NH25M22WC Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment ■ Main Application ● Mobile communication base station ● Exchanger ● Measuring instrument ● Synthesizer ● High-end router ■ Features ● Compact, with a low height. ● A surface-mount (SMD) package. Reflow soldering is possible. ● Excellent phase noise characteristics. (-135dBc/Hz at 1kHz) d En ● Excellent long-term frequency stability.(±100×10-9/year) ■ Specifications Model Item Measurement condition Nominal frequency (MHz) NH25M22WC 10 Supply voltage [VCC] (V) +5 ±5 % at start Power consumption (W) Max. 3 when stable (+25 °C) Max. 2 HCMOS level (VOL Max. 0.5 V, VOH Min. 4.5 V) Output voltage 40 to 60 at 1/2 VCC fe 1 Li -20 of ay M Symmetry (%) Load impedance (pF) 15 Operating temperature range (°C) −10 to +70 Storage temperature range (°C) −40 to +85 Stabilization Time (Frequency Stability) within ±200 ×10−9 after power on at +25°C , based on frequency after 60minutes operation. Stabilization time Long-term frequency stability Max. 5 minutes Based on frequency after 30 days operation Max. ±2×10−9/day Based on frequency after 30 days operation Max. ±100×10−9/year Frequency/Temperature characteristics −10 to +70 °C Max. ±20×10−9 Frequency/Voltage coefficient VCC +5V ± 5 % Max. ±10×10−9 Frequency control range Vcont +2.5 ± 2.5 V Min. ±1×10−6 Frequency change polarity Positive ■ Reference Value Offset frequency Phase noise (at 10 MHz) dBc/Hz 1 Hz −70 10 Hz −100 100 Hz −120 1 kHz −135 10 kHz −135 The value of phase noise changes when the frequency changes. ■ Dimensions ■ List of Options 7.6 ± 0.1 7.8 ± 0.2 22.0 ± 0.2 2.5 #7 #6 #2 Terminal land connections #1 #2 #3 #4 #5 #6 #7 Vcont NC VCC OUTPUT NC NC GND #3 2.5 #1 mm #5 #4 Tolerance ±0.5 mm Power supply voltage [VCC] (V) +3.3 Nominal frequency range (MHz) 10 to 20 For details of options, please feel free to contact our sales representatives. 3 25.4 ± 0.2 17.8 ± 0.1 ■ List of Ordering Codes Nominal frequency (MHz) 10 Ordering Code NH25M22WC-10M-NSA3419A The above frequencies are NDK’s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. ocxo12_110922_NH25M22WC_e