21 crystal unit specifications (characteristics) recommended soldering pattern external dimensions (unit: mm) internal connection in mc-405 internal connection in mc-406 (unit: mm) #4 #4 #3 #1 #2 #4 #3 #1 #2 #3 #1 2.54 2.54 0.51 0.51 2.29 4.1 3.9 4.1 4.1 3.9 4.1 #2 3.15 1.5 1.5 4.10.8 0.2 min. 3.6 max. 4.06 max. 9.6 10.41 max. 32.768k 6571a e do not connect #2 and #3 of mc-406 to external device. the first digit of no. means: 5xxxx mc-405 6xxxx mc-406 mc-406 mc-405 smd low/ medium-frequency crystal unit mc-405 / 406 ? high-density mounting-type smd. ? photolithography finished allows uniform, stable performance. ? excellent environmental capability. ? capable of covering low-frequency range from 20 khz to 165 khz. ? suitable for time keeping of clock and microcomputer. item nominal frequency range temperature range maximum drive level frequency tolerance (standard) turnover temperature (frequency) temperature coefficient (frequency) load capacitance series resistance motion capacitance shunt capacitance insulation resistance aging shock resistance symbol f t stg t opr gl d f/f q t a c l r 1 c 1 c 0 ir fa s.r. specifications 32.768 khz 20.000 khz to 165.000 khz 307.2 khz -55 ? to +125 ? -40 ? to +85 ? 1.0 ? max. ?0 x 10 -6 , ?0 x 10 -6 ?0 x 10 -6 , ?00 x 10 -6 (307.2 khz: ?00 x 10 -6 ) +25 ? ? ? -0.04 x 10 -6 / c 2 max. 6 pf to 50 k w max. 55 k w to 6 k w 2.0 ff typ. 4.0 ff to 0.6 ff 0.85 pf typ. 2.0 pf to 0.6 pf 500 m w min. ? x 10 -6 /year max. ? x 10 -6 /year max. ? x 10 -6 max. remarks stored as bare product after unpacking ta=+25 ?, dl=0.1 ? please specify for details, refer to page 15 ta=+25 ?? ?, first year three drops on a hard board from 750 mm or excitation test with 29400 m/s 2 x 0.3 ms x 1/2 sine wave x 3 directions storage temperature operating temperature actual size
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