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CM200C
TUNING FORK CRYSTAL UNITS (SMD • Plastic Package) CM200C . CM250C 3000pcs/reel ■ FEATURES 7Embeded with heat resistant cylinder type crystal bring highly stable characteristics. 7Automatic mounting and reflowable type. 7Most appropriate for clock source for portable and autmotive equipment with low power consumption. 実物大 ■ DIMENSION [mm] ■ SOLDER PAD LAYOUT [mm] 7.9±0.1 #4 Internal connection #3 #1 1.3 #3 #2 4.2 1.3 #2 5.5±0.5 （1.25） 0.5 0.5 1.9 2.4±0.1 （1.25） 1.3 #1 1.9 3.7±0.1 #4 （0.9） ∗ Do not connect to external with #2 and #3 ■ STANDARD SPECIFICATIONS Item Nominal Frequency Frequency Tolerance Model CM200C CM250C Conditions f0 32.768kHz 30kHz∼100kHz Need to contact us for the available frequency in CM250C △ f/f0 ±20ppm ±30ppm at 25˚C CL 12.5pF Operating Temperature Range TOPR −40℃∼＋85℃ Storage Temperature Range TSTR −55℃∼＋125℃ Turnover Temperature TM 25℃±5℃ Temperature Coefficient β −0.034±0.006ppm/℃2 Motional (series) resistance R1 50KΩMax. Level of drive DL Load capacitance Need to specify your requirement See figure 2 in P4 at 25˚C 1μW Max. △ f/f0 ±3ppm Max. ±5ppm Max. 25℃±3℃ Quality Factor Q 70000 Typ. 70000 ∼ 100000 Typ. Depend on frequency Shunt capacitance C0 1.35pF Typ. 0.8pF ∼ 1.7pF Typ. Depend on frequency Aging (first year) http://cfm.citizen.co.jp/english/product/pr02.html 10
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