VT Series Quartz Crystal Units for Low Frequencies VT-120-F FEATURES • Compact 1.2f tubular package. •Photolithographic process. •Excellent shock resistance and environmental characteristics. •RoHS directive compliant. •Complete Pb-free. APPLICATIONS Clock Source for Micro-Computers, Small/Thin Watches. STANDARD SPECIFICATIONS Conditions without notice (Temperature: 25± 2°C, DL: 0.1µW) Item Specifications Symbol Nominal Frequency f_nom 32.768kHz Frequency Tolerance f_tol ±20 x 10−6, ±30 x 10−6, ±50 x 10−6 Turnover Temperature Ti +25±5°C Parabolic Coefficient B (−3.5±1.0) x 10−8/°C2 Load Capacitance CL 6.0 to 12.5pF Motional Resistance (ESR) R1 50kΩ max. Absolute Maximum Drive Level DLmax 1µW DL 0.1µW Shunt Capacitance C0 0.8pF typ. Frequency Ageing f_age ±3 x 10-6 Operating Temperature T_use −20°C to +60°C Storage Temperature T_stg −30°C to +70°C Level of Drive Conditions / Notes +25±3°C, First Year Piece part basis DIMENSIONS VT-120-F 4.7max. 5.0min. (0.3) φ 1.2max. (φ 0.18) UNIT: mm www.sii-crystal.com Quartz Crystal 2011