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. DIMENSION [mm] SOLDER PAD LAYOUT [mm] 7.90.1 Internal connection #3 #4 #3 #1 #2 1.3 4.2 1.3 #2 5.50.5 1.25 0.5 0.5 1.9 2.40.1 1.25 1.3 #1 1.9 3.70.1 #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 30kHz100kHz Need to contact us for the available frequency in CM250C f/f0 20ppm 30ppm at 25C CL 12.5pF Operating Temperature Range TOPR -4085 Storage Temperature Range TSTR -55125 Turnover Temperature TM 255 Temperature Coefficient -0.0340.006ppm/2 Motional (series) resistance R1 50KMax. Level of drive DL Load capacitance Need to specify your requirement See figure 2 in P4 at 25C 1W Max. f/f0 3ppm Max. 5ppm Max. 253 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