NDK NH25M22WA

Crystal Oscillator
Model Name NH25M22WA
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 A surface-mount (SMD) package.
l Reflow soldering is possible.
l Excellent phase noise characteristics.
l Excellent aging characteristics.
n Specifications
Model
Item
Measurement condition
Standard nominal frequency (MHz)
NH25M22WA
32.768
Power supply voltage
DC +3.3V
Power consumption
3.0 W max. at the start and 1.3 W max. when stable (+25°C)
Output level
HCMOS (VOL : 0.4V max., VOH : 2.4V min.)
Load
10kΩ//15pF
Duty Cycle (1/2Vcc)
45 to 55%
Frequency stability
Operating temperature range
Aging
−10 to +70°C
Based on frequency after 30 days operation
±2×10−9/day max.
Based on frequency after 30 days operation
±50×10−9/year max.
Frequency / temperature characteristic −10 to +70°C
Power supply variation characteristics DC +3.3V±5%
±20×10−9 max.
Frequency control characteristic 0 to +2.8 V, positive polarity
±0.9×10−6 min.
±3×10−9 max.
n Reference Value
Offset frequency
dBc/Hz
1 Hz
Phase noise (@32.768MHz)
−65 max.
10 Hz
−95 max.
100 Hz
−115 max.
1k Hz
−125 max.
10k Hz
−140 max.
The value of phase noise changes when the frequency changes.
n Dimensions
8.9±0.1
n List of Options
8.9±0.1
PIN Connections
7.62±0.1
25.4
#1
#2
#3
#4
#5
#6
#7
VCONT
VREF
VCC
OUTPUT
ALARM
GND(Heating)
GND
2.5
22
#1
#2
#3
15.7
(1.0)
2.5
21.5
#7 #6
#5 #4
Tolerance ±0.2mm
Power supply voltage
DC +5V
Nominal frequency (MHz)
10 to 40
For details of options, please feel free to contact
our sales representatives.
n List of Ordering Codes
Frequency
(MHz)
Ordering Code
32.768
NH25M22WA-32.768M-NSA3425A
The above frequencies are NDK’ s standard frequencies.
Frequencies other than the above are available. Feel free to
contact our sales representatives.
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