QTC3 Series 1.5x3.2 SMD Tuning Fork Features Applications Low frequency in small size SMD Commercial and Industrial applications Seam sealed ceramic package offers excel- Wireless communications lent environmental & heat resistance PDA and Smartphone Extended temperature -40 to +85C for Time of day applications industrial applications General Specifications Mechanical Dimensions Nominal Frequency 32.768kHz Frenquency Tolerance at 25C 20ppm Temperature Coefficient -0.034 0.008ppm/D C 3,2 1,0 1,5 1,0 Temperature Range (Operating) -40 to +85C 0,7 0,7 Storage Temperature -55 to +125C Load Capacitance C 6pF, 7pF, 9pF, 12.5pF L Shunt Capacitance C 1.7pF typ. 0 Motional Capacitance C 3.0fF typ. 1 Equivalent Series Resistance (ESR) 50K typ. / 70K max. Drive Level 1W max. Aging per Year 3ppm max. Insulation Resistance (M ) 500 at 100Vdc 15Vdc Quality Factor 70000 typ. Capacitance Ratio 450 typ. Part Numbering Guide Qantek Code Package Nominal Frequency (in kHz) Load Capacitance Operating Temperature Range Frequency Tolerance Packaging Q = Qantek TC3 = 1.5x3.2 SMD 32.768 06 = 6pF B = -40 to +85C 1 = 10ppm R = 3000pcs Tape&Reel = Tuning Fork 07 = 7pF 2 = 20ppm 09 = 9pF 3 = 30ppm 12 = 12.5pF Example: QTC332.76812B2R bold letters = recommended standard specification Tape and Reel Dimensions QANTEK Technology Corporation Phone: +1 877-227-0440 (tollfree) www.qantek.com Fax: +1 877-227-0440 (tollfree) info qantek.com max.0,65 1,5 1,8 QTC3 Rev. 0.3QTC3 Series 1.5x3.2 SMD Tuning Fork Marking Code Guide Contains manufacturer code / lot code Solder Reflow Profile Frequency vs. Temperature Characteristics To calculate the frequency stability the parabolic curvature constant (K) is needed. For calculating the stability at 45C 1- Change in temperature (D T) is (45-25) = +20C 2- Change in frequency is (-0.034 x (D C)) = (-0.035 x (20) = -13.6ppm QANTEK Technology Corporation Phone: +1 877-227-0440 (tollfree) www.qantek.com Fax: +1 877-227-0440 (tollfree) info qantek.com QTC3 Rev. 0.3