Crystal Units
NX2520SG
For Mobile Communications
Features
■
Crystal Unit with built-in Thermistor construction.
● Minimize circuit design space by combining crystal unit into one component.
(Presently, Crystal unit and temperature sensor is mounted in one board separately.)
● Placing temperature sensor(Thermistor) close to Crystal blank in one airtight
housing can detect more precise crystal blank temperature. Improvement on
frequency temperature compensation compared to present Crystal unit.
● Single cavity housing which is ideal to module applications.
Specifications
■
Model
NX2520SG
Item
Nominal frequency
19.2 to 54 MHz
Fundamental
±10 × 10−6
Overtone order
Frequency tolerance (30°C)
Frequency versus temperature characteristics (with reference to +30 °C)
Operating temperature range
Storage temperature range
Equivalent series resistance
Level of drive
±12 × 10−6
−30 to +85 °C
−40 to +85 °C
Refer to *1
10 μW (Max. 100 μW)
7 pF
Load capacitance
How to Specify an Order
■
When ordering our products, specify them with an “Ordering Code” that consists of the following :
-
M -
Model name Frequency (Max : 9 digits)
Number for specifying an order
Example NX2520SG-19.200M-STD-CTX-1
If you have any queries concerning our standard frequencies and numbers for specifying orders, please contact our sales representatives or visit our homepage
(http://www.ndk.com/).
Dimensions
■
*2 Equivalent Series Resistance
mm
2.5 0.ꢀ
Nominal frequency
(MHz)
Equivalent Series
Resistance max. [Ω]
Terminal land connections
(TOP VIEW)
#4
#ꢀ
#3
#2
19.2 to 20
20 to 40
40 to 54
70
50
40
#4
#3
#ꢀ
#2
Terminal
#ꢀ, #3 : X’ tal
#4 : Thermistor
#2 : Thermistor & GND
Land pattern (Typical)
ꢀ.7
(0.8)
(0.8)
#ꢀ
#2
C0.3
C0.3
#4
#3
ꢀ.2
12A_0906_NX2520SG_e
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