crystal units at-51 / at-51ad / at-51cd / at-51cd2 for car electronics cu48_081201_at-51_e mm frequency range (mhz) 4 to 4.5 4.5 to 6 6 to 8 8 to 10 10 to 25 equivalent series resistance max. [] 150 120 80 70 50 *1 equivalent series resistance at-51 at-51ad at-51cd at-51cd2 at-51 mm at-51ad mm at-51cd mm at-51cd2 5.08 max 3.5 to 201 0.43 +0.05 -0.03 4.880.20 11.05max 10.1max 4.65max 11.5max 5.2 max 6.80.3 5.080.2 2.00.2 1.00.2 1.20.1 2.4 5.08 4.4 2.2 11.5max 5.0 max 6.80.3 2.00.2 1.20.2 1.00.2 3.5 10 1.5 9.00.3 10.1max 3.7max 0 to 0.3max 5.50.3 0.650.1 6.0 2.0 9.0 4.880.2 4.7 0.1 12.4 0.3 11.4 0.2 pb free reference land pattern reference land pattern reference land pattern connections connections connections n specifications n features when ordering our products, specify them with an ordering code that consists of the following : -- m if you have any queries concerning our standard frequencies and numbers for specifying orders, please contact our sales represe ntatives or visit our homepage (http://www.ndk.com/). model name frequency (max : 9 digits) number for specifying an order n how to specify an order example at-51-4.000m-std-pfe-2 n dimensions 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 sale s with your enquiries. a crystal unit, ideally suited for the clock signal generating source of the cpus for power trains and safety control devices, requiring extremity high reliability as part of an automobile s electronics system. highly reliable under severe environmental conditions in terms of stable start-up characteristics, heat and heat-cycle resistance and vibration resistance. a surface-mount crystal unit that due to the resin seating attached to the at-51 type crystal unit maintains high-level electrical characteristics and reliability. at-51ad, at-51cd and at-51cd2 meet the requirements for re-flow profiling using lead-free solder. at-51cd2 meets the requirements for re-flow profiling using lead-free solder. l l l frequency range overtone order frequency tolerance (25 3 ) temperature characteristics (with reference to +25 c) operating temperature range storage temperature range equivalent series resistance drive level load capacitance 4 to 25 mhz fundamental 50 10 ?6 150 10 ?6 ?40 to +125 ?40 to +125 refer to *1 50 w (max. 1000 w) 16 pf item model at-51 / at-51ad / at-51cd / at-51cd2
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