Crystal Oscillator NH37M28LN High Precision Oscillator (Twin-OCXO) for Fixed Communication Equipment ■ Main Application ● Base stations for system mobile communications ● Synthesizer ■ Features ● Exchanger ●Measuring instrument ● High-end router ● Low height and excellent temperature characteristics. ● Supports wide temperature range (–40 to +85 °C) ● Frequency adjustment by digital control method (I2C control). (Voltage contorol method (Vcont) is also possible.) ■ Specifications Model Item Measurement condition Nominal Frequency Range (MHz) NH37M28LN 10 Supply Voltage [VCC] (V) +5.0 ±5 % at start Power Consumption (W) Typ. 3.0 (Max. 3.5) when stable (+25 °C) Max. 1.6 Output Voltage LVCMOS (VOL Max. 0.4 V, VOH Min. 2.4 V) Symmetry (%) 45 to 55 Load Impedance (pF) 15 Operating Temperature Range (°C) –40 to +85 Storage Temperature Range (°C) –40 to +85 Stabilization Time Stabilization Time (Frequency Stability) within ±10 ×10−9 after power on at +25°C , based on frequency after 60minutes operation. Long-term Frequency Stability Based on frequency after 7 days operation Frequency/Temperature Characteristics VCC +3.3 V ±5 % Frequency Control Range Vcont +0.2 V to +2.8 V (@ +1.5V) Frequency Change Polarity Frequency Change Polarity Linearity Positive Typ. 5% mm Pin connections *NSA3650A : Vcont, DNC NSA3649A : SCL, SDA Vcont / SCL(I2C) * #1 #2 DNC(Don't connect)/ SDA(I2C) * #3 VCC #4 OUTPUT #5 DNC(Don't connect) #6 DNC(Don't connect) #7 DNC(Don't connect) #8 DNC(Don't connect) #9 DNC(Don't connect) #10 GND 0.65 Max.12.7 Max. 28.0 Max. 37.0 Typ. –110 100 Hz Typ. –135 1 kHz Typ. –152 10 kHz Typ. 157 100 kHz Typ. –160 Specification Number Voltage control (Vcont) 0 to 5.0V NSA3650A Digital control (I2C control) 0x800000 to 0x7FFFFF NSA3651A STAND OFF 㸦4POINT㸧 #4 #5 #6 12.70 10.16 7.62 5.08 2.54 #7 #10 5×Ø0.45±0.15 Typ. –83 10 Hz dBc/Hz ■ *1 Specification Number Control Range Min.3.0 Offset Frequency 1 Hz 0#9 17.8±0.3 25.4±0.3 17.78±0.30 Phase Noise (at 10 MHz) Frequency control method 15.24±0.30 5×Ø0.80±0.15 #1 ±0.3 to ±0.5×10–6 ■ Reference Value Pin number is not printed #8 Max. ±50×10–9/year ±0.2×10–9 ■ Dimensions #2 Max. ±0.2×10–9/day Max. ±0.5×10–9 Frequency/Voltage Coefficient #3 Max. 5 minutes Tolerance ±0.2 -5- Please specify the model name, frequency, and specification number when you order products. For further questions regarding specifications, please feel free to contact us. 1604A_NH37M28LN_e