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 Overtone Order NR-2C 10 to 25 MHz 45 to 95 MHz 80 to 150 MHz Fundamental 3rd overtone 5th overtone Frequency Tolerance (25 ±3 °C) Frequency versus Temperature Characteristics (with reference to +25 °C) Operating Temperature Range ±10 × 10−6 ±5 × 10−6 −10 to +60 °C Storage Temperature Range −40 to +85 °C Equivalent Series Resistance Max. 40Ω Level of Drive Max. 60Ω Max. 80Ω 10 μW (Max. 100 μW) Load Capacitance 12 pF Specifications Number Series resonance STD-CMB-4 STD-CMB-5 Model Item Nominal Frequency Overtone Order STD-CMB-6 NR-2B 10 to 30 MHz 25 to 30 MHz 30 to 75 MHz 50 to 100 MHz Fundamental 3rd overtone 3rd overtone 5th overtone Frequency Tolerance (25 ±3 °C) Frequency versus Temperature Characteristics (with reference to +25 °C) Operating Temperature Range ±10 × 10−6 ±5 × 10−6 −10 to +60 °C Storage Temperature Range −40 to +85 °C Equivalent Series Resistance Max. 25Ω Max. 50Ω Level of Drive Max. 45Ω Max. 60Ω 10 μW (Max. 100 μW) Load Capacitance 12 pF Specifications Number Series resonance STD-CMB-1 STD-CMB-2 STD-CMB-3 ■ 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 3.75 r0.20 7.90max 3.20max φ0.35r0.05 3.20max Please specify the model name, frequency, and specification number when you order products. For further questions regarding specifications, please feel free to contact us. - 35 - 110916_NR-2C_e