Crystal Oscillator NH25M22TB Oven Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment ■ Main Application ● Base stations for system mobile communications ● Optical transmission system ● Measuring instrument ● Synthesizer ● Exchanger ● High-end router ■ Features ● Supports wide temperature range. (-40 to +85°C) ● Excellent long-term frequency stability.(Max. ±30×10-9 / year) ● Excellent phase noise characteristics at frequency offsets. (-100dBc / Hz at 1Hz offset) ● Hermetic sealing package for excellent environmental-proof performance. ■ Specifications Model Item Measurement condition Nominal frequency (MHz) NH25M22TB 10 Supply voltage [VCC] (V) +5 ±5 % at start Power consumption (W) Max. 3 when stable (+25 °C) Max. 1.1 HCMOS level (VOL Max. 0.5 V, VOH Min. 3.5 V) Output voltage at+(VOH + VOL) / 2 Symmetry (%) 40 to 60 Load impedance (pF) 15 Operating temperature range (°C) −40 to +85 Storage temperature range (°C) −40 to +85 Stabilization Time (Frequency Stability) within ±500 ×10−9 after power on at +25°C , based on frequency after 60minutes operation. Stabilization Time (Frequency Stability) within ±100 ×10−9 after power on at +25°C , based on frequency after 60minutes operation. Stabilization time Max. 90 seconds Max. 3 minutes Max. ±1×10−9/day Long-term frequency stability Based on frequency after 30 days operation Frequency/Temperature characteristics −40 to +85 °C Max. ±10×10−9 Frequency/Voltage coefficient VCC +5 V ± 5 % Max. ±3×10−9 ■ Dimensions ■ Reference Value mm 17.8±0.1 7.62±0.10 25.4±0.3 Terminal land connections #1 DNC (Do not connect) #2 DNC #3 VCC #4 OUTPUT #5 DNC #6 DNC #7 GND Phase noise (at 10 MHz) Short-term frequency stability (at 10MHz) Nominal frequency (MHz) 10 2.5±0.3 #3 dBc/Hz 1 Hz Typ. −100 10 Hz Typ. −127 100 Hz Typ. −143 1 kHz Typ. −148 10 kHz Typ. −150 τ=1 Typ. 8×10−12 Ordering Code NH25M22TB-10M-NSA3627A We offer a test instrument(charge) for measuring accurately. The above frequency are NDK’s standard frequency. Frequencies other than the above are available. Feel free to contact our sales representatives. 2.5±0.3 #7 #6 Offset frequency ■ List of Ordering Codes 15±0.5 22±0.3 #1 #2 Max. ±30×10−9/year #5 #4 -7- 1501A_NH25M22TB_e