T38 MERCURY | Alldatasheet
Document overview
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Technical content
T38, T26, T15 32.768 KHz Tuning Fork Watch Crystals MERCURY Since 1973 MERCURY www.mercury-crystal.com Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: sales-tw@mercury-crystal.com U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: mercury@mercury-crystal.com - 26 -
- 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: T15 T26 T38 Frequency Tolerance at 25°C: ±15 ppm; ±20 ppm (standard), ±30 ppm Maximum Series Resistance: 40 k max. 35 k max. 35 k 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 Shunt Capacitance (Co): 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 Vibration Type: X-cut Turnover Temperature (TT): 25°C ±5°C Drive Level: 1 µW max. Parabolic Curvature Constant: -0.035ppm / °C2 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: 3 ppm maximum Aging: First year: 3 ppm maximum at 25°C
T38, T26, T15 32.768 KHz Tuning Fork Watch Crystals MERCURY Since 1973 - 27 - PACKAGE DIMENSIONS Unit: mm [inches] FREQUENCY-TEMPERATURE AND LOAD CAPACITANCE CHARACTERISTICS HOW TO ORDER Holder type T15, T26 or T38 32.768K Load Capacitance 8 pF, 6 pF or 12.5 pF Frequency Tolerance ±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.