Crystal Oscillator Model Name NH20M20LA 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, with a low height. l Excellent rise characteristics. l Excellent phase noise characteristics. l Excellent aging characteristics. n Specifications Model Item Measurement condition Standard nominal frequency (MHz) NH20M20LA 10 , 38.88 Power supply voltage DC +5V Power consumption 3 W max. at the start and 1.5 W max. when stable (+25°C) Output level HCMOS (VOL : 0.5V max., VOH : 4.5V min.) Load 15pF Duty Cycle (1/2Vcc) 45 to 55% Frequency stability Operating temperature range −10 to +70°C ±500×10-9 max. Frequency warm-up characteristic +25°C three minutes after power is on Aging Based on frequency after 30 days operation ±10×10−9/day max. Based on frequency after 30 days operation ±500×10−9/year max. Frequency / temperature characteristic −10 to +70°C ±200×10−9 max. Power supply variation characteristics DC +5V±5% ±50×10−9 max. Frequency control characteristic 0 to +5 V, positive polarity ±5×10−6 min. n Reference Value Offset frequency dBc/Hz 1 Hz Phase noise (@38.88MHz) −60 max. 10 Hz −90 max. 100 Hz −115 max. 1k Hz −135 max. 10k Hz −145 max. The value of phase noise changes when the frequency changes. n List of Options n Dimensions Operating temperature range PIN Connections 21max #1 #2 #3 #4 #5 #1 #2 Power supply voltage VCC OUTPUT GND VCONT NC Nominal frequency (MHz) Terminal number is not printed #3 n List of Ordering Codes 4POINT 7.62 15.24 7.62 10.5max 5 0.3 −0 +0.2 STAND OFF (GRASS) 5-φ0.45±0.1 DC +3.3V 10 to 38.88 For details of options, please feel free to contact our sales representatives. 21max #5 −30 to +70°C #4 15.24 Frequency (MHz) Ordering Code 10 38.88 NH20M20LA-10M-NSA3421A NH20M20LA-38.88M-NSA3421A The above frequencies are NDK’ s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. Tolerance ±0.5mm co43_080418_NH20M20LA_e1