crystal units at-51 / at-51cd2 for oa / av cu47_081201_at-51_e mm mm *1 equivalent series resistance (fundamental) *2 equivalent series resistance (3rd overtone) *3 drive level 3.1875 to 3.2 3.2 to 3.5 3.5 to 3.8 3.8 to 4.2 4.2 to 4.883 4.883 to 5.2 5.2 to 5.7 5.7 to 6.6 6.6 to 6.8 6.8 to 8.3 8.3 to 10.7 10.7 to 12.2 12.2 to 15 15 to 28.63636 frequency range (mhz) 400 200 140 120 100 80 70 60 55 50 45 40 35 30 equivalent series resistance max. [] 26 to 35 35 to 48 48 to 75 frequency range (mhz) 140 100 80 equivalent series resistance max. [] at-51 at-51cd2 at-51 at-51cd2 5.08 max 3.5 to 201 0.43 +0.05 -0.03 4.880.20 11.05max 10.1max 4.65max 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 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 features n specifications n how to specify an order a highly stable and reliable crystal unit with a metallic package, also suitable for surface mounting. with many standard frequencies available, this unit is ideal for a variety of applications. compatible with surface mounting. airtight metal package ensures high-reliability. at-51cd2 meets the requirements for re-flow profiling using lead-free solder. l l l l example at-51-4.000m-std-pfv-2 n dimensions 3.1875 to 3.541 3.541 to 28.63636 26 to 60 60 to 75 frequency range (mhz) 500 50 500 10 drive level (w) fundamental 3rd overtone overtone order 3rd overtone overtone order fundamental overtone order reference land pattern connections 26 to 75 mhz 3rd overtone series resonance 3.1875 to 28.63636 mhz fundamental 16 pf 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 20 10 ?6 30 10 ?6 ?10 to +70 ?40 to +85 refer to *1 and *2 refer to *3 (max. 1000 w) item model at-51 / at-51cd2
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