QT252T-26.000METY-T

QT252T Temperature Sensing Crystal Fuel The Digital World Features ● ● ● ● ● Applications Frequency range : 12MHz to 54MHz SMD seam sealing ceramic package Crystal with thermally coupled temperature sensor (Thermistor) External dimensions (mm) L : 2.5 x W : 2.0 x H : 1.0 RoHS compliant & Pb free ● ● ● ● Mobile communications WiFi, Bluetooth GPS Mobile phone, Tablet, Wearables Electrical Characteristics Item QT252T Conditions Frequency Range F0 12MHz ~ 54MHz Frequency Tolerance Ftol ±10 ppm at 25°C Frequency Stability over Operating Temperature Range Fstab ±10 ppm refer to 25°C Operating Temperature Range TOTR -30°C ~ +85°C Shunt Capacitance C0 3 pF Max. Drive Level DL 1μW ~ 200μW (50μW Typ.) Load Capacitance CL 6pF, 7pF, 8pF Aging Faging ±1 ppm Max. Storage Temperature Range TSTR -40°C ~ +105°C Resistance - 100 KΩ ± 1% at 25°C; Note [1] B-constant - 4250 K ± 1% 25°C~+50°C; Note [1] at 25°C, first year NTC Thermistor Notes: [1] Please contact us for other specifications. Motional Resistance (ESR) Fundamental 12 ~ 13 MHz 14 ~ 30 MHz 30 ~ 54 MHz Rev. 1.01 150Ω Max. 100Ω Max. 60Ω Max. Page 1 www.qstproducts.com QT252T Temperature Sensing Crystal Fuel The Digital World Dimensions Block diagram and Pin function Symbol Function Pin 1 XT1 XTAL Terminal 1 Pin 2 RT2 Thermistor Terminal 2 Pin 3 XT2 XTAL Terminal 2 Pin 4 RT1 Thermistor Terminal 1 Note: (a) Pin 2 is connected to the metal lid and thermistor (b) Pin 4 is connected to the thermistor only (c) RT2 is recommended to GND Recommended pad layout (Unit: mm) Ordering Information QT252T - 19.200M - E T V - T Frequency in Hz Packaging Method Please contact us for available frequencies T Tape & Reel Load Capacitance Frequency Tolerance (at 25°C) E ± 10 ppm B Y V 6 pF 7 pF 8 pF Frequency Stability (over Temp.) T Rev. 1.01 ± 10 ppm ( -30°C ~ +85°C ) Page 2 www.qstproducts.com QT252T Temperature Sensing Crystal Fuel The Digital World Packing (Unit: mm) Reflow Profile Solder melting point : 220°C ± 10°C, 60 sec. Min. Peak temperature : 260°C ± 10°C, 10 sec. Min. (°C) 10 sec 260 220 180 150 120 sec Rev. 1.01 60 sec Page 3 Time (sec) www.qstproducts.com