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| TUNING FORK CRYSTAL UNITS FEATURES DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS SERIES R38, R26, AND R145 3 x 8, 2 x 6, 1 x 5 mm SPECIFICATIONS HOLDER TYPE NOMINAL FREQUENCY FREQUENCY TOLERANCE TURNOVER TEMPERATURE PARABOLIC CURVATURE CONSTANT (TYP) LOAD CAPACITANCE EQUIVALENT SERIES RESISTANCE (MAX) DRIVE LEVEL (TYP) MOTIONAL CAPACITANCE (TYP) SHUNT CAPACITANCE (TYP) CAPACITANCE RATIO (TYP) AGING (FIRST YEAR MAX) QUALITY FACTOR (TYP) INSULATION RESISTANCE (MIN) OPERATING TEMPERATURE RANGE STORAGE TEMPERATURE RANGE SHOCK RESISTANCE STANDARD PART NUMBER R38 32.768 kHz 5 10 20 PPM 25C 5C -0.034 PPM/C 6 or 12.5 pF 35k OHM 1.0 W 0.0035 pF 1.6 pF 460 3 PPM 90000 500 M OHM R26 32.768 kHz 5 10 20 PPM 25C 5C -0.034 PPM/C 6 or 12.5 pF 35k OHM R145 32.768 kHz 5 10 20 PPM 25C 5C -0.034 PPM/C 8.0 pF 40k OHM R38, R26 30.00 kHz TO 153.6 kHz 5 10 20 PPM 25C 5C -0.034 PPM/C 6 or 12.5 pF 30k TO 50k OHM 1.0 W .001 TO .004 pF 0.8 TO 1.7 pF 425 TO 800 5 PPM FREQUENCY-PACKAGE SPECIFIC 500 M OHM 1.0 W 1.0 W 0.003 pF 0.0025 pF 1.35 pF 1.0 pF 450 400 3 PPM 3 PPM 70000 80000 500 M OHM 500 M OHM -20C TO +60C STANDARD -40C TO +85C EXTENDED -40C TO +85C 5 PPM MAXIMUM 75 cm DROP TEST IN 3 AXES ONTO A HARD SURFACE OR 3000 g x 0.3 ms x 1/2 SINEWAVE IN 3 AXES R38-32.768-12.5 R26-32.768-12.5 R145-32.768-12.5 SEE PART NUMBERING SYSTEM COMMON FREQUENCIES ARE: 31.250 kHz, 31.500 kHz, 40.00 kHz, AND 76.800 kHz FREQUENCY DEVIATION AT T IS GIVEN AS: f/f = K(To - T), WHERE K IS PARABOLIC CURVATURE CONSTANT OTHER LOAD CAPACITANCES ARE AVAILABLE OUTLINE DRAWINGS R145 1.50 M AX .059 M AX R26 2.10 MAX .083 MAX R38 3.10 MAX .122 MAX 8.20 MAX 10.001.0 .394.039 6.20 MAX 5.6 MIN 5.10 M AX .201 M AX 4.30 .169 .220 MIN 0.26 DIA .010 DIA .244 MAX .323 MAX 0.2 DIA .008 DIA 0.70 .028 0.35 DIA .014 DIA SCALE NONE DIMENSION IN mm/INCH 0.45 .018 1.10 .043 PART NUMBERING SYSTEM SERIES R38 R26 R145 IN kHz FREQUENCY IN pF LOAD CAPACITANCE TOLERANCE 5 PPM 10 PPM EXTENDED TEMPERATURE EXT ( 20 PPM ONLY) EXAMPLES: R38-32.768-6-10PPM R26-32.768-12.5-EXT Raltron Electronics Corporation 10651 NW 19th St. Miami, Florida 33172 U.S.A. Tel: 305-593-6033 Fax: 305-594-3973 e-mail: sales@raltron.com Internet: http://www.raltron.com |
Price & Availability of R26
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