Crystal Oscillator NH37M28LN High Precision Oscillator (Twin-OCXO) for Fixed Communication Equipment ■ Main Application ● Base stations for system mobile communications ● Measuring instrument ● High-end router ● Synthesizer ● Exchanger ■ Features ● Low height and excellent temperature characteristics. ● Supports wide temperature range. ● Frequency adjustment by digital control method (I2C control). (Voltage contorol method (Vcont) is also possible.) ■ Specifications Model Item Nominal Frequency fnom (MHz) NH37M28LN 10 Supply Voltage Vcc (V) +5 Load Impedance CL (pF) 15 Operating Temperature Range Topr (°C) –40 to + 85 Storage Temperature Range Tstr (°C) –40 to + 85 at start Power Consumption PCC (W) Max. 3.5 (Typ. 3.0) when stable, at +25 °C Max. 1.6 Frequency Tolerance Δf/fnom at +25°C, Vcont = Center, before shipment Frequency/Temperature Characteristics Δf/f at Operating Temperature Range Max. ±0.5×10–9 Frequency/Voltage Coefficient Δf/f VCC ± 5% Max. ±0.2×10–9 Long-term Frequency Stability Δf/f Based on frequency after 7 days operation Stabilization Time (min.) Time within specified frequency tolerance after power on at +25°C, based on frequency after 60minutes operation. Frequency Control Method Max. 25×10-9 Max. ±0.2×10–9 / day Max. ±50×10–9 / year Max. 5 / within ± 10×10–9 Analog Control Vcont = +2.5V±2.5V Frequency Control Range Δf/f ±0.3 to ±0.5×10–6 Frequency Change Polarity Positive Linearity (%) Max. ±5 LVCMOS VOL : Max. +0.4 V VOH : Min. +2.4 V 45 to 55 Output Voltage at (VOH + VOL) / 2 Symmetry (%) Specification Number NSA3650A ■ Dimensions 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 #1 #6 #8 12.70 10.16 7.62 5.08 2.54 #7 #10 Typ. –83 10 Hz Typ. –110 100 Hz Typ. –135 1 kHz Typ. –152 10 kHz Typ. –157 100 kHz Typ. –160 dBc/Hz 5×Ø0.45±0.15 STAND OFF 㸦4POINT㸧 #4 #5 0#9 17.8±0.3 25.4±0.3 17.78±0.30 3.0 min Min.3.0 15.24±0.30 5×Ø0.80±0.15 Phase Noise (at 10 MHz) Offset Frequency 1 Hz Max.12.7 12.7 max 28.0 Max.max 28.0 Max. 37.0 37.0 max #2 NSA3649A ■ Reference Value Pin number is not printed #3 Digital Control (I2C) 0x800000 to 0x7FFFFF Center : 0x000000 ±0.3 to ±0.5×10–6 Tolerance ±0.2 Tolerance ±0.3 It might be printed manegement code to the bottom. We offer dedicated tool for evaluation of this product Please specify the model name, frequency, and specification number when you order products. For further questions regarding specifications, please feel free to contact us. 1706C_NH37M28LN_e