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 Nominal frequency (MHz) Equivalent Series Resistance max. [Ω] 10 to 30 25 to 30 30 to 75 50 to 100 25 50 45 60 5th overtone The above specifications are standard for this NDK product. Custom-made specifications such as load capacitance and temperature characteristics are also available. Please contact NDK sales with your enquiries. ■ 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 2.20r0.20 6.90r0.20 20min 20min 3.75 r0.20 7.90max 2.20r0.20 8.00max 6.00max 6.90r0.20 mm NR-2B φ0.35r0.05 3.20max 3.75 r0.20 7.90max φ0.35r0.05 3.20max cu52_110916_NR-2C_e