Crystal Oscillator Model Name NH37M28LA Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment n Main Application l Mobile communication base station l Exchanger l Measuring instrument l High-end router l Synthesizer 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) NH37M28LA 10 Power supply voltage DC +5V Power consumption 3 W max. at the start and 1.3 W max. when stable (+25°C) Output level HCMOS (VOL : 0.5V max., VOH : 4.5V min.) Load 15pF Frequency stability Duty Cycle (1/2Vcc) 40 to 60% Operating temperature range −10 to +70°C Frequency warm-up characteristic +25°C five minutes after power is on ±50×10−9 max. Aging Based on frequency after 72 hours operation ±2×10−9/day max. Based on frequency after 72 hours operation ±50×10−9/year max. Frequency / temperature characteristic −10 to +70°C ±10×10−9 max. Power supply variation characteristics DC +5V±5% ±3×10−9 max. Frequency control characteristic 0 to +4 V, positive polarity ±1×10−6 min. n Reference Value Offset frequency Phase noise (@10MHz) dBc/Hz 1 Hz −85 max. 10 Hz −120 max. 100 Hz −140 max. 1k Hz −145 max. 10k Hz −150 max. The value of phase noise changes when the frequency changes. n Dimensions n List of Options 36 Operating temperature range PIN Connections #1 #2 #3 #4 #5 27.0 24.0 33.1 Power supply voltage VCONT VREF VCC OUTPUT GND −40 to +70°C DC +3.3V Nominal frequency (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 17.8±0.3 19max 0.65±0.3 #3 #5 17.78±0.3 25.4±0.3 Tolerance ±0.5mm n List of Ordering Codes Frequency (MHz) Ordering Code 10 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. co39_080418_NH37M28LA_e1