T38, T26, T15 • • • MERCURY 32.768 KHz Tuning Fork Watch Crystals Since 1973 Micro tubular holder (cylindrical type) X-cut tuning fork crystals. Ideal for 1Hz timing frequency. Compact and high-shock. SPECIFICATIONS Frequency: 32.768 kHz Crystal Holder Prefix: MEC Part Number: Holder Sizes: T15 T26 T38 T15-32.768K-8P T26-32.768K-12.5P T38-32.768K-12.5P Ø 1.5 mm x 5.0mm Frequency Tolerance at 25°C: Maximum Series Resistance: Ø 2.0 mm x 6.0mm Ø 3.0 mm x 8.0mm ±15 ppm; ±20 ppm (standard), ±30 ppm 40 kΩ max. 35 kΩ max. 35 kΩ max. Quality Factor (Q): 40,000 minimum 50,000 minimum 50,000 minimum Motional Capacitance (C1): 0.0025 pf typical 0.0030 pf typical 0.0035 pf typical 1.00 pf typical 1.35 pf typical 1.60 pf typical Capacitance Ratio (Co/C1): 400 typical 450 typical 460 typical Load Capacitance (CL): 8pF typical 6 pF or 12.5 pF 6 pF or 12.5pF Shunt Capacitance (Co): Vibration Type: X-cut Turnover Temperature (TT): 25°C ±5°C Drive Level: 1 μW max. 2 Parabolic Curvature Constant: -0.035ppm / °C typical Operating Temperature Range: -10°C to +60°C Storage Temperature Range: -30°C to +70°C Shock: 3 ppm maximum 3 drops from a height of 75 cm onto hardwood Vibration: Aging: MERCURY 3 ppm maximum First year: 3 ppm maximum at 25°C www.mercury-crystal.com Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: [email protected] U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: [email protected] Mercury Page 1 of 2 Date; Oct. 27, 2003 Rev. 0 T38, T26, T15 32.768 KHz Tuning Fork Watch Crystals PACKAGE DIMENSIONS MERCURY Since 1973 Unit: mm [inches] FREQUENCY-TEMPERATURE AND LOAD CAPACITANCE CHARACTERISTICS HOW TO ORDER Holder type ˙ 32.768K ˙ T15, T26 or T38 Load Capacitance ˙ Frequency Tolerance 8 pF, 6 pF or 12.5 pF ±15, ±20 or ±30 ppm Example: T26-32.768K-6P-20 represents 2x6 mm 32.768 KHz with 6 pF load capacitance and ±20 ppm frequency tolerance. Mercury Page 2 of 2 Date; Oct. 27, 2003 Rev. 0