NH25M22WE

Crystal Oscillator
Model Name NH25M22WE
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.
● A surface-mount (SMD) package. Reflow soldering is possible.
● Excellent phase noise characteristics. (-125dBc/Hz at 1kHz)
● Excellent long-term frequency stability.(±500×10-9/year)
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■ Specifications
Model
Item Measurement condition
Nominal frequency (MHz)
NH25M22WE
19.44
Supply voltage [VCC] (V)
+3.3 ±5 %
at start
Power consumption (W)
Max. 2.4
when stable (+25 °C)
Max. 1.2
HCMOS level (VOL Max. 0.4 V, VOH Min. 2.4 V)
Output voltage
Symmetry (%)
40 to 60
at 1/2 VCC
Operating temperature range (°C)
Storage temperature range (°C)
Stabilization time
−10 to +70
−40 to +85
Stabilization Time (Frequency Stability) within
±500 ×10−9 after power on at +25°C ,
based on frequency after 60minutes operation.
Max. 5 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
12
e
lif 20
-
Long-term frequency stability
15
of
Load impedance (pF)
Frequency/Temperature characteristics
−10 to +70 °C
Frequency/Voltage coefficient
VCC +3.3 V ± 5 %
Max. ±20×10−9
Frequency control range
Vcont +1.4 ± 1.4 V
Min. ±2×10−6
■ Reference Value
Phase noise (at 19.44 MHz)
Positive
ec
Frequency change polarity
Max. ±100×10−9
Offset frequency
dBc/Hz
1 Hz
−65
10 Hz
−95
100 Hz
−120
1 kHz
−125
10 kHz
−130
The value of phase noise changes when the frequency changes.
■ List of Options
■ Dimensions
8.9 ± 0.1
mm
8.9 ± 0.1
Terminal land connections
25.4
#1
#2
#3
#4
#5
10.5
(1.0)
22
Vcont
NC
VCC
OUTPUT
GND
#5
#3
2.5
#2
#4
+5
10 to 20
For details of options, please feel free to contact
our sales representatives.
■ List of Ordering Codes
Nominal
frequency
(MHz)
19.44
2.5
#1
Power supply voltage [VCC] (V)
Nominal frequency range (MHz)
Tolerance ±0.2 mm
Ordering Code
NH25M22WE-19.44M-NSA3417A
The above frequencies are NDK’s standard frequencies.
Frequencies other than the above are available. Feel free to
contact our sales representatives.
ocxo14_110922_NH25M22WE_e