Crystal Units
NX2520SG
■
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.
For Mobile Communications
■
Specifications
Item
Nominal frequency
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
Load capacitance
Model
NX2520SG
19.2 to 54 MHz
Fundamental
±10 × 10
−6
±12 × 10
−6
−30 to +85 °C
−40 to +85 °C
Refer to *1
10 μW (Max. 100 μW)
7 pF
■
How to Specify an Order
When ordering our products, specify them with an “Ordering Code” that consists of the following :
Model name - Frequency (Max : 9 digits) M - 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
2.5±0.1
#4
2.0.±0.1
#3
mm
Terminal land connections
(TOP VIEW)
#4
#3
*2 Equivalent Series Resistance
Nominal frequency
(MHz)
19.2 to 20
20 to 40
40 to 54
Equivalent Series
Resistance max. [Ω]
70
50
40
#1
#2
#1
#2
Terminal
#1, #3 : X’ tal
#4 : Thermistor
#2 : Thermistor & GND
0.90±0.10
(0.65)
#1
(0.8)
(0.8)
Land pattern (Typical)
#2
1.7
C0.3
1.3
1.0
#3
1.2
(0.65)
C0.3
#4
-1-
12A_0906_NX2520SG_e
NDK [ NIHON DEMPA KOGYO ]
