Crystal Units AT-41 / AT-41CD2 For OA / AV ■ Features A highly stable and reliable low-height crystal unit with a metallic package, also suitable for surface mounting. ● Compatible with surface mounting. ● Airtight metal package ensures high-reliability. ● Taping package is for customer automatic loading operation. ● AT-41CD2 meets the requirements for re-flow profiling using lead- AT-41 free solder. AT-41CD2 ■ Specifications Model Item Nominal Frequency *1 Equivalent Series Resistance AT-41 / AT-41CD2 3.1375 to 36.864 MHz Overtone Order 26.9 to 74.1 MHz Fundamental 3rd overtone Frequency Tolerance (25 ±3 °C) Frequency versus Temperature Characteristics (with reference to +25 °C) Operating Temperature Range ±20 × 10 −10 to +70 °C Storage Temperature Range −40 to +85 °C Overtone Order Nominal frequency Equivalent Series (MHz) Resistance max. [Ω] 3.1375 to 3.2 3.2 to 3.5 3.5 to 4 4 to 4.5 4.5 to 5 5 to 6 6 to 8 8 to 10 10 to 12 12 to 37 26 to 35 35 to 48 48 to 74.1 400 200 150 120 100 80 70 60 50 40 140 100 80 Nominal frequency (MHz) Drive Level (μW) 3.1375 to 5 5 to 37 26 to 60 60 to 74.1 500 50 500 10 −6 ±30 × 10−6 Equivalent Series Resistance Fundamental Refer to *1 Level of Drive Refer to *2 (Max. 1000 μW) Load Capacitance 16 pF Series resonance The above specifications are standard for this NDK product. 3rd overtone *2 Drive Level Overtone Order Fundamental 3rd overtone ■ 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 AT-41-16.000M-STD-LPH-9 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 10.21max AT-41CD2 0.75±0.3 φ0.45±0.05 4.70max 11.4±0.3 Land pattern (Typical) 6.0 2.0 11.05max 12.7±0.6 4.8±0.2 4.88±0.2 mm -0.2 to +0.3 13.2±1 4.0±0.5 3.68max 3.9max AT-41 4.88±0.2 - 29 - 9.0 120306_AT-41_e