Crystal Oscillator Model Name NH37M28LA Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment ■ Main Application ● Mobile communication base station ● Exchanger ● Measuring instrument ● Synthesizer ● High-end router ■ Features ● Compact. ● Excellent phase noise characteristics. (-145dBc/Hz at 1kHz) ● Excellent long-term frequency stability.(±50×10-9/year) d En ■ Specifications Model Item Measurement condition Nominal frequency (MHz) NH37M28LA 10 Supply voltage [VCC] (V) +5 ±5 % at start Power consumption (W) Max. 3 when stable (+25 °C) Max. 1.3 HCMOS level (VOL Max. 0.5 V, VOH Min. 4.5 V) Output voltage 40 to 60 at 1/2 VCC Load impedance (pF) fe 1 Li -20 of ay M Symmetry (%) 15 Operating temperature range (°C) −10 to +70 Storage temperature range (°C) −40 to +85 Stabilization Time (Frequency Stability) within ±50 ×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 72 hours operation Max. ±2×10−9/day Based on frequency after 72 hours operation Max. ±50×10−9/year Frequency/Temperature characteristics −10 to +70 °C Max. ±10×10−9 Frequency/Voltage coefficient VCC +5 V ± 5 % Max. ±3×10−9 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 −85 10 Hz −120 100 Hz −140 1 kHz −145 10 kHz −150 The value of phase noise changes when the frequency changes. ■ Dimensions mm Pin connections 19max 4.5min 0.65 ± 0.3 5 - φ0.8 #3 Terminal number is not printed 25.4 ± 0.3 #5 17.8 ± 0.3 15.24 ± 0.3 #2 Tolerance ±0.5 mm −40 to +70 Power supply voltage [VCC] (V) +3.3 Nominal frequency range (MHz) 10 to 40 For details of options, please feel free to contact our sales representatives. ■ List of Ordering Codes Nominal frequency (MHz) 10 #4 STAND OFF (4 POINT) #1 17.78 ± 0.3 Vcont NC VCC OUTPUT GND Operating temperature range (°C) 3 #1 #2 #3 #4 #5 24.0 27.0 36 33.1 ■ List of Options Ordering Code NH37M28LA-10M-NSA3427A The above frequencies are NDK’s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. ocxo04_110922_NH37M28LA_e