Crystal Oscillator Model Name NH20M20LA Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment ■ Main Application ● Mobile communication base station ● Exchanger ● Measuring instrument ● Synthesizer ● High-end router ■ Features ● Compact, with a low height. ● Excellent rise characteristics. ● Excellent phase noise characteristics. (38.88MHz : -135dBc/Hz at 1kHz) d En ■ Specifications Model Item Measurement condition Nominal frequency (MHz) NH20M20LA 10, 38.88 Supply voltage [VCC] (V) +5 ±5 % at start Power consumption (W) Max. 3 when stable (+25 °C) Max. 1.5 HCMOS level (VOL Max. 0.5 V, VOH Min. 4.5 V) Output voltage Symmetry (%) 40 to 60 at 1/2 VCC Operating temperature range (°C) Storage temperature range (°C) Stabilization time Stabilization Time (Frequency Stability) within ±500 ×10−9 after power on at +25°C , based on frequency after 60minutes operation. Max. 3 minutes Based on frequency after 30 days operation Max. ±10×10−9/day Based on frequency after 30 days operation Max. ±500×10−9/year D Frequency/Temperature characteristics −10 to +70 °C Frequency/Voltage coefficient VCC +5V ± 5 % Frequency control range Vcont +2.5 ± 2.5 V Max. ±200×10−9 Max. ±50×10−9 Min. ±5×10−6 ■ Reference Value Phase noise (at 38.88 MHz) Offset frequency dBc/Hz 1 Hz −60 10 Hz −90 100 Hz −115 1 kHz −135 10 kHz −145 The value of phase noise changes when the frequency changes. ■ Dimensions ■ List of Options 21.5max mm 0.3 −0 +0.2 5 10.5max 21.5max 5 - Φ0.45 ± 0.1 #1 #2 #3 #4 #5 VCC OUTPUT GND Vcont NC Terminal number is not printed #3 7.62 #2 Pin connections 15.24 #1 #4 #5 7.62 15.24 Positive ec Frequency change polarity STAND OFF (GLASS) 4POINT 15 −10 to +70 −40 to +85 12 e lif 20 - Long-term frequency stability of Load impedance (pF) Tolerance ±0.5 mm Operating temperature range (°C) −30 to +70 Power supply voltage [VCC] (V) +3.3 Nominal frequency range (MHz) 10 to 38.88 For details of options, please feel free to contact our sales representatives. ■ List of Ordering Codes Nominal frequency (MHz) 10 NH20M20LA-10M-NSA3421A 38.88 NH20M20LA-38.88M-NSA3421A Ordering Code The above frequencies are NDK’s standard frequencies. Frequencies other than the above are available. Feel free to contact our sales representatives. ocxo09_110922_NH20M20LA_e