Crystal Oscillator Model Name NH37M28LB Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment ■ Main Application ● Base stations mobile communication system ● Measuring instrument ● Synthesizer ● Exchanger ● High-end router ■ Features ● Compact. ● Excellent phase noise characteristics. (-145dBc/Hz at 1kHz) ● Excellent long-term frequency stability.(±100×10-9/year) e 13 lif 0 2 of pd e S En ■ Specifications Model Item Measurement condition Nominal frequency (MHz) NH37M28LB 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 Symmetry (%) 40 to 60 at 1/2 VCC Load impedance (pF) 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 72 hours operation Max. ±2×10−9/day Based on frequency after 72 hours operation Max. ±100×10−9/year Frequency/Temperature characteristics −10 to +70 °C Max. ±10×10−9 Frequency/Voltage coefficient VCC +5 V ± 5 % Max. ±1×10−9 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 −80 10 Hz −120 100 Hz −140 1 kHz −145 10 kHz −150 The value of phase noise changes when the frequency changes. ■ Dimensions ■ List of Options mm 36 33.1 19max 4.5min 0.65 ± 0.3 24.0 27.0 Pin connections 5 - φ0.8 #3 Vcont NC VCC OUTPUT GND Terminal number is not printed 15.24 ± 0.3 17.8 ± 0.3 25.4 ± 0.3 #5 Tolerance ±0.5 mm -5- −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 #2 STAND OFF (4 POINT) #1 17.78 ± 0.3 #1 #2 #3 #4 #5 Operating temperature range (°C) Ordering Code NH37M28LB-10M-NSA3423A The above frequencies are NDK’s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. 12A_1023_NH37M28LB_e