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Crystal Oscillator
Model Name NH20M20LC
Oven Controlled Crystal Oscillator (OCXO)
for Fixed Communication Equipment
■ Main Application
● Base stations for Mobile communication system
● Measuring instrument
● Synthesizer
● Exchanger
● High-end router
■ Features
● Compact, with a low height.
● Excellent rise characteristics.
● Excellent phase noise characteristics. (38.88MHz : -145dBc/Hz at 1kHz)
■ Specifications
Model
Item
Measurement condition
Nominal frequency (MHz)
NH20M20LC
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
Load impedance (pF)
15
Operating temperature range (°C)
−20 to +70
Storage temperature range (°C)
Stabilization time
Long-term frequency stability
−40 to +85
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
Frequency/Temperature characteristics
−20 to +70 °C
Max. ±200×10−9
Frequency/Voltage coefficient
VCC +5 V ± 5 %
Max. ±50×10−9
Frequency tolerance
at +25 °C
Max. ±500×10−9
■ Reference Value
Phase noise
(at 38.88 MHz)
Offset frequency
dBc/Hz
1 Hz
Typ. −70
10 Hz
Typ. −100
100 Hz
Typ. −130
1 kHz
Typ. −145
10 kHz
Typ. −145
The value of phase noise changes when the frequency changes.
■ Dimensions
■ List of Ordering Codes
21.5max
mm
0.3 −0
+0.2
11
5 10.5max
21.5max
5 - Φ0.45 ± 0.1
#2
VCC
OUTPUT
GND
VNC
cont
NC
NH20M20LC-38.88M-NSA3604A
The above frequencies are NDK’s standard frequencies.
Frequencies other than the above are available. Feel free to
contact our sales representatives.
Terminal number is not printed
#3
7.62
#1
#1
#2
#3
#4
#5
Ordering Code
15.24
STAND OFF
(GLASS)
4POINT
Pin connections
Nominal
frequency
(MHz)
38.88
#4
#5
7.62
15.24
Tolerance ±0.5 mm
-7-
1410A_NH20M20LC_e