VT Series(VT-150/VT-200) Quartz Crystal Units for Watches FEATURES • Compact tubular package. • Photolithographic process. • Excellent shock resistance and environmental characteristics. APPLICATIONS • Real Time Clocks, Timers, Pagers, Cameras, RemoteControllers, Portable Applications STANDARD SPECIFICATIONS Item Conditions without notice (Temperature: +25±2°C) Symbol Specifications Nominal Frequency fo 32.768kHz Allowable Frequency Tolerance f/fo Conditions / Notes (±5 x 10-6) ±10 x 10-6, ±20 x 10-6 Turnover Temperature Tp +25±5°C Temperature Coefficient K (-3.5±0.8) x 10-8/°C2 Load Capacitance CL 4.5 to12.5pF Series Resistance R1 50kΩ max. Absolute Maximum Drive Level DLmax 1µW Recommended Drive Level DL 0.1µW Shunt Capacitance C0 Frequency Change Over Time f/fo ±5 x 10-6 max. Operating Temperature Range Tope -10°C to +60°C Storage Temperature Range Tsto -30°C to +70°C 0.86pF typ. DIMENSIONS +25±3°C, First Year FREQUENCY-TEMPERATURE CURVE VT-150 (x 10 -6) 0 5.0 max. 4.5 min. -10 -20 (0.45) ø1.5 ø0.2 Frequency -30 Deviation -40 UNIT: mm ∆f/f0 Typ. -50 Tp=25˚C K=-0.035 x 10-6/˚C 2 -60 -20 VT-200 5.0 min. (0.6) ø2.0 UNIT: mm 14 0 10 20 30 Temperature ø0.2 6.0 max. -10 40 50 60 70 (˚C)