QTC2 Series 1.2x2.0 SMD Tuning Fork Features Applications Low frequency in smallest 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 Speci cations Mechanical Dimensions Nominal Frequency 32.768kHz Frenquency Tolerance at 25C 20ppm 2,0 0,8 0,7 0,8 Temperature Coef cient -0.034 0.008ppm/ C 0,55 0,55 Temperature Range (Operating) -40 to +85C Storage Temperature -55 to +125C Load Capacitance C 7pF, 9pF, 12.5pF L Shunt Capacitance C 1.0pF typ. 0 Motional Capacitance C 3.5fF typ. 1 Equivalent Series Resistance (ESR) 90K max. Drive Level 0.5W 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 TC2 = 1.2x2.0 SMD 32.768 07 = 7pF B = -40 to +85C 1 = 10ppm R = 3000pcs Tape&Reel = Tuning Fork 09 = 9pF 2 = 20ppm 12 = 12.5pF Example: QTC232.76812B2R bold letters = recommended standard speci cation 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 1,2 max.0,60 1,5 QTC2 Rev. 0.1QTC2 Series 1.2x2.0 SMD Tuning Fork Marking Code Guide Contains manufacturer code / lot code Solder Re ow Pro le 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 ( T) is (45-25) = +20C 2- Change in frequency is (-0.034 x ( 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 QTC2 Rev. 0.1