TFNC Series Tuning Fork Crystals FEATURES 32.7680 kHz Frequency Reference Tuning Fork Crystal Design Package Sizes 8.3mmx3.1mm, 6.2mmx2.1mm, 5.1mmx1.5mm Cylindrical Package Frequency Tolerance, ±20 ppm Standard Frequency Temperature Coefficient, -0.035ppm/°C2 Operating Temperature, -10°C to +60°C Standard Packaging, Bulk in Bag RoHS Compliant in Accordance with EU Directive 2011/65/EU APPLICATIONS The TFNC crystal series is ideal for use in a wide range of applications requiring a real-time frequency reference. Compatible to Citizen CFS Series and Epson C-Type. ORDERING INFORMATION TFNC 3 2 K7 6 8 0 PACKAGE SIZE 38 = 8.3mm x 3.1mm 26 = 6.2mm x 2.1mm 15 = 5.1mm x 1.5mm FREQUENCY IN kHz K - indicates kHz and decimal point. 1 2 LOAD CAPACITANCE P = 12.5pF [standard] T = 6pF K = 8pF [TFNC15 only] FREQUENCY TOLERANCE @ 25°C 2 = ±20ppm [standard] 1 = ±10ppm 1] Contact factory for availability and MOQ requirements. 2] Frequency is recorded with two leading digits before the ‘K’ and 4 significant digits after the ‘K’ (including zeros). Not all performance combinations and frequencies may be available. Contact your local CTS Representative or CTS Customer Service for availability. PACKAGING INFORMATION [reference] Packaging format is bulk in bag. Maximum 500pcs. per bag. Document No. 008-0406-0 Page 1- 3 www.ctscorp.com Rev. B TFNC Series Tuning Fork Crystals ELECTRICAL CHARACTERISTICS ELECTRICAL PARAMETERS PARAMETER SYMBOL Frequency Operating Mode Frequency Tolerance * f0 ∆f/f0 Frequency Temperature Coefficient Frequency Stability ∆f/fM Operating Temperature Range TA Turnover Temperature TM Load Capacitance * CL Aging Drive Level ∆f/f0 DL Shunt Capacitance C0 Motional Capacitance C1 Series Resistance R1 Insulation Resistance Ri Storage Temperature Range CONDITIONS MIN TYP MAX 32.7680 Flexural Mode [Tuning Fork] @+25°C - 10 or 20 - -0.035 ±0.006ppm/°C2 See Figure 1 UNIT kHz ± ppm - -10 - +60 °C ±5°C TFNC38, TFNC26 TFNC15 - +25 12.5 8.0 - °C @+25°C, 1st year - 1.6 1.35 1.0 3.0 1.0 - ± ppm µW - 3.0 - fF TFNC38 TFNC26 TFNC15 +100Vdc ±15Vdc T STR pF pF - - 50 k Ohms 500 - - M Ohms -40 - +85 °C * See Ordering Information for available options. FIGURE 1 PARABOLIC TEMPERATURE CURVE 0 -10 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 -20 Frequency stability [ppm] is determined using parabolic curve, ∆f = Temperature Coefficent(TA-TM)2. -30 -40 Ex. Find frequency stability at TA = 45°C ∆f = -0.035(45-25)2 ∆f = -0.035(20)2 ∆f = -14.0 ppm ∆f/f [ppm] -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 Temperature [°C] Document No. 008-0406-0 Page 2 - 3 Rev. B TFNC Series Tuning Fork Crystals MECHANICAL SPECIFICATIONS PACKAGE DRAWINGS MARKING INFORMATION 1. Product is not marked. See label on bag or carton. NOTES 1. Complete CTS part number, frequency value, date code and manufacturing site code information must appear on bags and carton labels. 2. Termination pads (e2); barrier plating is nickel [Ni] with tin [Sn] copper [Cu] finish. 3. Soldering iron attach; 300°C maximum, 5 seconds. 4. MSL = 1. Document No. 008-0406-0 Page 3 - 3 Rev. B