Crystal Oscillator Model Name NH25M22WA Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment ■ Main Application ● Mobile communication base station ● Exchanger ● Measuring instrument ● Synthesizer ● High-end router ■ Features ● Supports low power supply voltage.(3.3V) ● A surface-mount (SMD) package. Reflow soldering is possible. ● Excellent phase noise characteristics. (-125dBc/Hz at 1kHz) d En ● Excellent long-term frequency stability.(±50×10-9/year) ■ Specifications Model Item Measurement condition Nominal frequency (MHz) NH25M22WA 32.768 Supply voltage [VCC] (V) Power consumption (W) +3.3 ±5 % at start Max. 3.0 when stable (+25 °C) Max. 1.3 HCMOS level (VOL Max. 0.4 V, VOH Min. 2.4 V) Output voltage Symmetry (%) 40 to 60 Load impedance (pF) fe 1 Li -20 of ay M at 1/2 VCC 15 Operating temperature range (°C) −10 to +70 Storage temperature range (°C) Stabilization time Long-term frequency stability −40 to +85 Stabilization Time (Frequency Stability) within ±50 ×10−9 after power on at +25°C , based on frequency after 60minutes operation. Max. 5 minutes Based on frequency after 30 days operation Max. ±2×10−9/day Based on frequency after 30 days operation Max. ±50×10−9/year Frequency/Temperature characteristics −10 to +70 °C Max. ±20×10−9 Frequency/Voltage coefficient VCC +3.3 V ± 5 % Max. ±3×10−9 Frequency control range Vcont +1.4 ± 1.4 V Min. ±0.9×10−6 Frequency change polarity Positive ■ Reference Value Phase noise (at 32.768 MHz) Offset frequency dBc/Hz 1 Hz −65 10 Hz −95 100 Hz −115 1 kHz −125 10 kHz −140 The value of phase noise changes when the frequency changes. ■ Dimensions ■ List of Options (1.0) 15.7 22 21.5 mm Terminal land connections #1 #2 #3 #4 #5 #6 #7 Vcont NC VCC OUTPUT NC GND(Heating) GND(Case) 2.5 #7 #6 #2 #3 2.5 #1 #5 #4 Tolerance ±0.2 mm Power supply voltage [VCC] (V) +5 Nominal frequency range (MHz) 10 to 40 For details of options, please feel free to contact our sales representatives. 3 25.4 8.9 ± 0.1 8.9 ± 0.1 7.62 ± 0.1 ■ List of Ordering Codes Nominal frequency (MHz) 32.768 Ordering Code 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. ocxo10_110922_NH25M22WA_e