Tuning Fork Crystal C26 & C38 Model 32.768KHz Tuning Fork Crystal Frequency: Calibration Tolerance: Turnover Temperature: Frequency vs Temp.: 32.768KHz ±20ppm @ 25°C 25°C ±5°C -0.034 ±0.006ppm/°C2 (See Chart 1) Operating Temp. Range: -10°C to 60°C Storage: -40°C to 85°C ESR: 35K ohm Max Load Capacitance: 12.5pF Std. Motional Capacitance: (C26) 0.0030pF Typ. (C38) 0.0035pF Typ. Shunt Capacitance: (C26) 1.35pF Typ. (C38) 1.60pF Typ. Capacitance Ratio: (C26) 450 Typ. (C38) 460 Typ. Drive Level: 1uW Max Insulation Resistance: 500M ohm Min, DC100V±15V Aging: <3ppm 1st/yr Max 25°C ±3° Miniature package provides excellent shock resistance and low power consumption. Offers an excellent clock source for communication and measuring equipment. C26 C38 0.081 ±0.002 (2.06 ±0.05) 0.256 ±0.020 (6.50 ±0.50) 0.276 (7.01) Dimensions inches (mm) All dimensions are Max unless otherwise specified. 0.118 ±0.002 (3.00 ±0.05) 0.315 ±0.020 (8.00 ±0.50) 0.008 ±0.001 (0.20 ±0.03) 0.413 (10.49) 0.012 ±0.001 (0.30 ±0.03) 0.043 ±0.004 (1.09 ±0.10) 0.028 ±0.004 (0.70 ±0.10) Processing notes: Hand soldering: Lead wire temperature not to exceed 270°C, 10 sec Max. Chart 1 Reflow Oven: Not recommended. 0 PPM Solder-dip: Crystal package is recommended to be mounted in the up-right position. If mounted sideways caution must be taken to insure that heat is not transmitted over crystal package. Typical Temperature Characteristic -50 -10 0 25 Temperature °C 60 Cleaning: Washable Specifications subject to change without notice. 34 TD-020818 Rev. B