TUNING FORK CRYSTAL UNIT (SMD * Ceramic Package) CM315 RoHS compliant / Pb free 3000pcs/reel FEATURES 7Tuning fork crystal with ceramic packaged type. 7High-density SMD type Ultra-light weight with ultra-miniature packaging. High-stability assured with tight vacuum sealing. 7Most appropriate for portable devices and mobile telecommunications devices. Life-size DIMENSION [mm] SOLDER PAD LAYOUT [mm] 1.50.1 3.20.1 1.1 1.4 1.1 1.9 0.9 Max. 4-R0.15 2.4 0.1 1.8 Internal connection 1.3 C0.3 0.6 0.1 Do not design any patterns on shaded area. STANDARD SPECIFICATIONS Item Model CM315 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 0.95pF Typ. Nominal Frequency Frequency Tolerance Load capacitance Aging (first year) Shunt capacitance http://cfm.citizen.co.jp/english/product/pr02.html at 25C 253 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Citizen: CM315-32.768KDZY-UT CM315-32.768KDZF-UT