Crystal Oscillator Model Name NH37M28LB Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment n Main Application l Mobile communications l Measuring instrument l Synthesizer base station l Exchanger l High-end router n Features l Compact. l Excellent rise characteristics. l Excellent phase noise characteristics. l Excellent aging characteristics. n Specifications Model Item Measurement condition Standard nominal frequency (MHz) NH37M28LB 10 +5 ±5 % Power supply voltage [VCC] (V) Max. 3 at start Power consumption (W) Max. 1.3 when stable (+25 °C) HCMOS level (VOL Max. 0.5 V, VOH Min. 4.5 V) Output level at 1/2 VCC Duty Cycle (%) 40 to 60 15 Load (pF) −10 to +70 Frequency stability Operating temperature range (℃) +25 °C five minutes after power is on Frequency warm-up characteristics Based on frequency after 60 minutes operation Aging Max. ±50×10−9 Based on frequency after 72 hours operation Max. ±2×10−9/day Based on frequency after 72 hours operation Max. ±100×10−9/year Max. ±10×10−9 Frequency / temperature characteristics −10 ℃ to +70 ℃ Power supply variation characteristics VCC +5 V ±5 % Frequency control characteristics Max. ±1×10−9 Min. ±1×10−6 +2.5 ±2.5 V Positive Control polarity n Reference Value Offset frequency Phase noise (at 10 MHz) dBc/Hz 1 Hz Max. −80 10 Hz Max. −120 100 Hz Max. −140 1 kHz Max. −145 10 kHz Max. −150 The value of phase noise changes when the frequency changes. n List of Options n Dimensions 36 mm PIN Connections #1 #2 #3 #4 #5 27.0 24.0 33.1 VCONT NC VCC OUTPUT GND Operating temperature range (℃) −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. Terminal number is not printed 5 - φ0.8 4.5min STAND OFF (4 POINT) #4 #1 15.24 ± 0.3 #2 n List of Ordering Codes 17.8 ± 0.3 19max 0.65 ± 0.3 #3 #5 17.78 ± 0.3 25.4 ± 0.3 Frequency (MHz) Ordering Code 10 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. Tolerance ±0.5 mm co43_090326_NH37M28LB_e