TUNING FORK CRYSTAL UNIT (SMD * Ceramic Package) CM519 RoHS compliant / Pb free 3000pcs/reel FEATURES 7Tuning fork crystal with ceramic packaged type. 7Small & thin packaging and light weight. 7Most appropriate for portable devices and mobile telecommunications devices. Life-size DIMENSION [mm] SOLDER PAD LAYOUT [mm] 1.80.15 4.90.15 4-R0.15 2.9 1.3 2.2 1.0 Max. 1.3 0.1 3.2 Internal connection 1.6 0.53 3.95 0.75 0.1 Do not design any patterns on shaded area. STANDARD SPECIFICATIONS Item Model CM519 Conditions f0 32.768kHz f/f0 20ppm at 25C CL 9.0pF, 12.5pF Need to specify your requirement Operating Temperature Range TOPR -4085 Storage Temperature Range TSTR -55125 Turnover Temperature TM 255 Temperature Coefficient -0.0340.006ppm/2 Motional (series) resistance R1 70KMax. Level of drive DL 1W Max. f/f0 3ppm Max. C0 1.35pF Typ. Nominal Frequency Frequency Tolerance Load capacitance Aging (first year) Shunt capacitance http://cfm.citizen.co.jp/english/product/pr02.html at 25C 253