a ctual size http://www.epsontoyocom.co.jp crystal unit 12 s p ecifications ( characteristics ) item symbol specifications remarks nominal frequency range f 32.768 khz 20 khz to 165 khz 307.2 khz(mc-405 / 406) please contact us regarding available frequencies storage temperature t_stg -55 c to +125 c stored as bare product after unpacking temperature range operating temperature t_use -40 c to +85 c level of drive dl 1.0 w max. frequency tolerance (standard) f_tol 20 10 -6 , 50 10 -6 50 10 -6 , 100 10 -6 +25 c, dl=0.1 w turnover temperature ti +25 c 5 c parabolic coefficient b -0.04 10 -6 / c 2 max. load capacitance cl 6 pf to (standard :12.5 pf ) please specify motional resistance (esr) r 1 50 k ? max. 55 k ? to 6 k ? as per below table 1.8 ff typ. mc-306 motional capacitance c 1 2.0 ff typ. 4.0 ff to 0.6 ff mc-405 / 406 0.9 pf typ. mc-306 shunt capacitance c 0 0.85 pf typ. 2.0 pf to 0.6 pf mc-405 / 406 frequency aging f_age 3 10 -6 / year max. 5 10 -6 / year max. +25 c, first year motional resistance ( esr ) frequency 20 khz f< 31.2 khz 31.2 khz f< 40 khz 40 khz f< 90 khz 90 khz f< 130 khz 130 khz f 165 khz 307.2 khz motional resistance 55 k ? max. 35 k ? max. 20 k ? max. 12 k ? max. 10 k ? max. 6 k ? max. external dimensions ( unit:mm ) ? . foot p rint ( recommended ) ( unit:mm ) ? mc-306 mc-405 / 406 mc-306 metal may be exposed on the top or bottom of this product. this will not affect any quality, reliability or electrical spec. do not connect #2 and #3 to external device. internal connection #4 #1 #2 #3 1.9 (0.9) (0.9) 5.5 0.5 2.54 max. 2.38 8.0 max. #4 #1 #2 #3 3.8 max. 3.2 32.768 k e 571 do not connect #2 and #3 of mc-406 to external device. the first digit of no. means: 5 mc-405 6 mc-406 mc-405 / 406 #4 #1 #2 #3 #4 #1 #2 #3 internal connection in mc-406 internal connection in mc-405 0.2 min. 3.6 max. 3.15 2.54 2.54 4.06 max. #1 #4 #3 #2 10.41 max. 9.60 32.768 k e 6571a 0.51 0.51 2.29 mc-306 mc-405 1.52 0.8 4.1 3.9 4.1 1.52 4.1 3.9 4.1 4.1 mc-406 1.9 1.9 1.3 4.2 1.3 1.3 khz range crystal unit smd mc - 306 / 405 / 406 ? frequency range : 32.768 khz (20 khz to 165 khz) ? thickness : 2.54 mm max.(mc-306) 3.60 mm max.(mc-405 / 406) ? overtone order : fundamental /overtone (307.2 khz) ? applications : clock and microcomputer ? lead(pb)-free : high melting temperature type solder (pb85 %) exempted by rohs directive.
part numbering system * standard khz crystals (tuning fork crystal) mc-306 76.8000k a 0 - crystal package type: c-2 2 x 6mm c-4 1.5 x 5mm mc-206: 4pin sop, 2.0mm height mc-306 4pin ?j? lead smd, 2.54mm height mc-405 4pin ?j? lead smd, 3.6mm height mc-406 4pin ?j? lead smd, 3.6mm height hts: temperature sensor frequency range: k: in khz to 4 decimal places c-2: 20~165khz 8~307.2khz c-4: 32~120khz 8~192khz mc: 20~165khz (32~100khz mc-206 only) hts: 40khz freq. tolerance@25c a : +/-20ppm b: +/-50ppm blank: +/-100ppm (std) load capacitance: a: 12.5pf aa: 27.0pf b: 16.0pf ab: 30.0pf c: 18.0pf ac: 9.0pf d: 22.0pf ad: 50.0pf e: 6.0pf ae: 22.9pf f: series af: 35.0pf g: 20.0pf ag: 7.0pf h: 32.0pf ah: 40.0pf i: 33.0pf ai: 25.0pf j: 18.5pf aj: 8.0pf k: 10.0pf ak: 10.5pf l: 18.3pf al: 9.5pf m: 100.0pf am: 9.2pf n: 13.5pf an: 7.8pf p: 11.0pf ap: 10.7pf q: 28.0pf r: 15.0pf s: 9.6pf t: 13.0pf u: 47.0pf v: 24.0pf w: 12.0pf x: 5.0pf y: 14.0pf z: 26.0pf tape & reel qty (for mc type only) 0: 1000pcs per reel 3: 250pcs per reel * not applicable to the 32.768khz crystals
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