TUNING FORK CRYSTAL UNITS (SMD * Plastic Package) CM200C . CM250C RoHS compliant 3000pcs/reel FEATURES 7Molding a heat resistant cylinder with resin. 7Most appropriate for clock source for portable equipment with low power consumption. Life-size 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 Aging (first year) Shunt capacitance Need to specify your requirement at 25C 1W Max. f/f0 3ppm Max. 5ppm Max. 253 C0 1.35pF Typ. 0.8pF 1.7pF Typ. Depend on frequency http://cfm.citizen.co.jp/english/product/pr02.html