Tuning Fork Quartz Crystals 32.768 kHz Tubular Crystal Technical Data NTF3238 / NTF3226 Series Electrical Specifications Nominal Frequency at 25°C f NTF3238 Frequency Tolerance ACTUAL SIZE Description The NTF tuning fork type quartz crystal provides the circuit designer with the ultimate in size, performance, and economic trade-offs. This highly reliable, stable, and accurate device is available in two microminiature sizes for real-time or low power applications operating from a 32.768 kHz reference frequency. Applications & Features • Very small, compact packaging • Rugged, resistant to shock and vibration • Excellent resistance to heat shock and environmental conditions • Ideal for real-time clocks NTF3226 32.768 kHz ±20 ppm Turnover Temperature TO Temperature Characteristic K Quality Factor Q 100,000 typ 90,000 typ Load Capacitance CL 12 to 13pF 12 to 13pF Series Resistance RS 30KΩ max 40KΩ max Motional Capacitance C1 0.0035pF typ 0.0027pF typ Shunt Capacitance C0 1.7pF typ Drive Level Pd Aging ∆ F/f 25°C ±5°C -0.038ppm/°C2 Typical Frequency deviation at temperature T ( ∆ f/f = K(T0 – T )2 1.5pF typ 1µW max First 30 Days: 3.0ppm First Year: 5.0ppm Operating Temperature Range -10 to +60°C Storage Temperature Range -30 to +70°C Mechanical Shock: Solderability: Terminal Strength: Vibration: Solvent Resistance: Resistance to Soldering Heat: MIL-STD-883, Method 2002, Condition B MIL-STD-883, Method 2003 MIL-STD-202, Method 211, Conditions A and C MIL-STD-883, Method 2007, Condition A MIL-STD-202, Method 215 MIL-STD-202, Method 210, Condition B Environmental Gross Leak Test: Fine Leak Test: Thermal Shock: Moisture Resistance: MIL-STD-883, Method 1014, Condition C MIL-STD-883, Method 1014, Condition A2 MIL-STD-883, Method 1011, Condition A MIL-STD-883, Method 1004 All specifications are subject to change without notice. www.saronix.com DS-118 REV E Tuning Fork Quartz Crystals Technical Data NTF3238 / NTF3226 Series Package Details Typical Temperature Characteristic D 0 C B A B C L D NTF3238 A 1.1±0.2 0.8±0.1 .031±.004 0.3±0.07 0.2±0.05 .012±.003 .008±.002 3.1 2.1 8.3 .327 9.0 .354 max max min -20 -40 NTF3226 .043±.008 .122 F / F – ppm L REF 32.768 kHz Tubular Crystal .083 6.8 .268 5.0 .197 -80 -20 0 max 40 60 80 Part Numbering Guide min mm ) inches 20 TEMPERATURE — ˚C max Parts will be individually marked, or shipped unmarked in static-free bags labeled with part number. Scale: None ( Dimensions in -60 NTF 3226 Type E CL (Load Capacitance) E: 12 ~ 13 pF Package Size 3238 = 3 mm x 8 mm 3226 = 2 mm x 6 mm All specifications are subject to change without notice. www.saronix.com DS-118 REV E