Quartz Crystal Units STANDARD LOW FREQUENCY SMD CRYSTALS 31SMX 31SMX STANDARD SPECIFICATIONS Item XTAL Symbol Specifications Part number Package type Nominal frequency P/N 31M327 31SMX 32.768 kHz Frequency tolerance at ＋25˚C Δf/F Actual Size 31SMX F Load capacitance CL Equivalent series resistance Drive level Turnover temperature Temperature coefficient Quality factor Shunt capacitance Motional capacitance Capacitance ratio Aging (for first year) Insulation resistance Cut Operating temperature range Storage temperature range Shock resistance Vibration resistance IR reflow resistance Reflow soldering condition Rs P Tt β Q Co C1 γ 0.95±0.05 1.2±0.1 3.2±0.1 0.73 1.74 0.73 XY-CUT 0 Temperature(゜ C) -20 -10 0 +10 +20 +30 +40 +50 +60 +70 +80 -10 -20 -30 -40 -50 -60 -70 -80 △f/f(ppm) TYPICAL TEMPERATURE CHARACTERISTICS SOLDERING PATTERN 1.3 1.0 Δf/F Ri To Ts Δf/F Δf/F Δf/F 1.3 1.6 PACKAGE DATA Package Item 2.3 TAPE SPECIFICATIONS 31SMX Lid Glass Base Glass Sealing Anode Terminal plating Gold 4.0±0.1 A D φ1.5 +-0.1 0 C L 1.75±0.1 2.0±0.1 J B M A B C D F F J L M Reel Dia. Qty/Reel 3.7 1.5 12.0 5.5 4.0 1.0 0.3 1.2 180 3000pcs B: ±20 ppm C:±30 ppm (standard) D:±50 ppm 12.5 pF 9pF 7pF 31M327 31M327-9 31M327-7 50 kΩ max. 0.1μW (1.0μW max.) ＋25˚C ±5˚C -0.035 ppm/˚C2, Typical 30000 min. 1.7 pF, Typical 0.0029 pF, Typical 580, Typical ±3 ppm max. at ＋25˚C ±3˚C 500MΩmin. at 100V DC ±15V XY-Cut -40˚C to ＋85˚C -55˚C to ＋125˚C ±10 ppm max. ±5 ppm max. ±5 ppm max. 20 seconds max. at ＋230˚C