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Crystal Units
NR-2C / NR-2B
For High Precision Industry
■ Features
A highly reliable crystal unit with outstanding frequency stability
and covering a broad frequency range.
● The product satisfies strict temperature characteristics standards,
is shock resistant and has excellent frequency reproducibility.
NR-2C
NR-2B
■ Specifications
Model
Item
Nominal Frequency
NR-2C
NR-2B
10 to 25 MHz 45 to 95 MHz 80 to 150 MHz 10 to 30 MHz 25 to 75 MHz 50 to 100 MHz
Overtone Order
Fundamental
3rd overtone
5th overtone
Frequency Tolerance (25 ±3 °C)
Frequency versus Temperature
Characteristics (with reference to +25 °C)
Operating Temperature Range
Fundamental
3rd overtone
5th overtone
±10 × 10−6
±5 × 10−6
−10 to +60 °C
Storage Temperature Range
−40 to +85 °C
Equivalent Series Resistance
Refer to *1
Refer to *2
Level of Drive
10 μW (Max. 100 μW)
Load Capacitance
12 pF
Series resonance
*1 Equivalent Series Resistance(NR-2C)
12 pF
Series resonance
*2 Equivalent Series Resistance(NR-2B)
Overtone Order
Nominal frequency
(MHz)
Equivalent Series
Resistance max. [Ω]
Fundamental
3rd overtone
5th overtone
10 to 25
45 to 95
80 to 150
40
60
80
Overtone Order
Fundamental
3rd overtone
5th overtone
The above specifications are standard for this NDK product.
Nominal frequency
(MHz)
Equivalent Series
Resistance max. [Ω]
10 to 30
25 to 30
30 to 75
50 to 100
25
50
45
60
■ 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 NR-2C-10.368M-STD-CMB-4
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
mm
NR-2C
mm
NR-2B
2.20r0.20
6.90r0.20
20min
20min
3.75 r0.20
7.90max
2.20r0.20
8.00max
6.00max
6.90r0.20
φ0.35r0.05
3.75 r0.20
7.90max
3.20max
φ0.35r0.05
3.20max
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