Crystal Units NX1255GB For Automotive ■ Features A small surface-mount type crystal unit, ideal for Automotive. Compatible with an engine control CPU clock delivering the high reliability that is particularly demanded. ●Stable start-up characteristic even under extremely severe environmental conditions. ●Excellent environmental characteristics, including heat, vibration and shock resistance. ●Compatible with low frequencies starting from 3.5 MHz. ●Meets the requirements for re-flow profiling using lead-free solder. ●Conforms to AEC-Q200. ■ Specifications Model Item Nominal frequency NX1255GB 3.5 to 25 MHz Overtone order Fundamental Frequency tolerance (25 ±3 °C) ±50 × 10−6 Frequency versus temperature characteristics (with reference to +25 °C) ±150 × 10−6 Operating temperature range −40 to +125 °C Storage temperature range −40 to +125 °C Equivalent series resistance Refer to *1 Level of drive 50 μW (Max. 500 μW) Load capacitance 12 pF The above specifications are standard for this NDK product. ■ 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 NX1255GB-4.000M-STD-CSS-3 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 Terminal land connections (TOP VIEW) 11.8±0.15 #3 5.5±0.15 #4 #2 Nominal frequency (MHz) Equivalent Series Resistance max. [Ω] 3.5 to 4 200 4 to 8 180 8 to 12 120 12 to 25 80 2.5±0.15 #1 *1 Equivalent Series Resistance Land pattern (Typical) 2.4 #2 2.2 #1 2.0 4.4 1.5 5.08 #4 #3 5.08 - 36 - 110916_NX1255GB_e