Crystal Oscillator
Model Name NH37M28LA
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Main Application
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Mobile communication base station
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Measuring instrument
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Synthesizer
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Exchanger
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High-end router
Oven-Controlled Crystal Oscillator (OCXO) for Fixed Communication Equipment
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Features
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Compact.
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Excellent rise characteristics.
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Excellent phase noise characteristics.
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Excellent aging characteristics.
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Specifications
Measurement condition
Standard nominal frequency (MHz)
Power supply voltage
Power consumption
Output level
Load
Duty Cycle (1/2Vcc)
Operating temperature range
Frequency stability
Frequency warm-up characteristic +25°C five minutes after power is on
Aging
Based on frequency after 72 hours operation
Based on frequency after 72 hours operation
Frequency / temperature characteristic −10 to +70°C
Power supply variation characteristics DC +5V±5%
Frequency control characteristic 0 to +4 V, positive polarity
Item
Model
NH37M28LA
10
DC +5V
3 W max. at the start and 1.3 W max. when stable (+25°C)
HCMOS (V
OL
: 0.5V max., V
OH
: 4.5V min.)
15pF
40 to 60%
−10 to +70°C
±50×10
−9
max.
±2×10
−9
/day max.
±50×10
−9
/year max.
±10×10
−9
max.
±3×10
−9
max.
±1×10
−6
min.
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Reference Value
Offset frequency
1 Hz
10 Hz
100 Hz
1k Hz
10k Hz
dBc/Hz
−85 max.
−120 max.
−140 max.
−145 max.
−150 max.
Phase noise (@10MHz)
The value of phase noise changes when the frequency changes.
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Dimensions
36
33.1
PIN Connections
#1
#2
#3
#4
#5
VCONT
VREF
VCC
OUTPUT
GND
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List of Options
Operating temperature range
Power supply voltage
Nominal frequency (MHz)
−40 to +70°C
DC +3.3V
10 to 40
For details of options, please feel free to contact
our sales representatives.
24.0
27.0
Terminal number is not printed
#3
0.65±0.3
19max
#2
STAND OFF
(4 POINT) #4
17.8±0.3
15.24±0.3
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List of Ordering Codes
Frequency
(MHz)
10
Ordering Code
NH37M28LA-10M-NSA3427A
4.5min
5-φ0.8
#1
#5
17.78±0.3
25.4±0.3
Tolerance ±0.5mm
The above frequencies are NDK’ s standard frequencies.
Frequencies other than the above are available. Feel free to
contact our sales representatives.
co39_080418_NH37M28LA_e1
NDK [ NIHON DEMPA KOGYO ]
