TUNING FORK CRYSTAL UNITS FEATURES SERIES R38, R26, AND R145 DESIGNED FOR TIME OF DAY CLOCKS APPLICATIONS 3 x 8, 2 x 6, 1 x 5 mm SMALL COMPACT SIZE WITH PERFORMANCE AND ECONOMY EXCELLENT SHOCK AND ENVIRONMENTAL CHARACTERISTICS SPECIFICATIONS HOLDER TYPE R38 R26 R145 R38, R26 NOMINAL FREQUENCY 32.768 kHz 32.768 kHz 32.768 kHz 30.00 kHz TO 153.6 kHz FREQUENCY TOLERANCE 5 10 20 PPM 5 10 20 PPM 5 10 20 PPM 5 10 20 PPM TURNOVER TEMPERATURE 25C 5C 25C 5C 25C 5C 25C 5C PARABOLIC CURVATURE -0.034 PPM/C -0.034 PPM/C -0.034 PPM/C -0.034 PPM/C CONSTANT (TYP) LOAD CAPACITANCE 6 or 12.5 pF 6 or 12.5 pF 8.0 pF 6 or 12.5 pF EQUIVALENT SERIES 35k OHM 35k OHM 40k OHM 30k TO 50k OHM RESISTANCE (MAX) DRIVE LEVEL (TYP) 1.0 W 1.0 W 1.0 W 1.0 W MOTIONAL CAPACITANCE (TYP) 0.0035 pF 0.003 pF 0.0025 pF .001 TO .004 pF SHUNT CAPACITANCE (TYP) 1.6 pF 1.35 pF 1.0 pF 0.8 TO 1.7 pF CAPACITANCE RATIO (TYP) 460 450 400 425 TO 800 AGING (FIRST YEAR MAX) 3 PPM 3 PPM 3 PPM 5 PPM QUALITY FACTOR (TYP) 90000 70000 80000 FREQUENCY-PACKAGE SPECIFIC INSULATION RESISTANCE (MIN) 500 M OHM 500 M OHM 500 M OHM 500 M OHM OPERATING TEMPERATURE -20C TO +60C STANDARD -40C TO +85C EXTENDED RANGE STORAGE TEMPERATURE -40C TO +85C RANGE 5 PPM MAXIMUM 75 cm DROP TEST IN 3 AXES ONTO A HARD SURFACE SHOCK RESISTANCE OR 3000 g x 0.3 ms x SINEWAVE IN 3 AXES STANDARD PART NUMBER 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 1.50 MAX R26 R38 R145 2.10 MAX 3.10 MAX .059 MAX .122 MAX .083 MAX 0.26 DIA 0.35 DIA SCALE NONE DIMENSION IN mm/INCH .010 DIA 0.2 DIA .014 DIA .008 DIA 0.70 .028 1.10 0.45 .043 .018 PART NUMBERING SYSTEM LOAD EXTENDED SERIES FREQUENCY TOLERANCE CAPACITANCE TEMPERATURE R38-- - - 5 PPM EXT R26 IN kHz IN pF 10 PPM ( 20 PPM ONLY) R145 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: X-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for raltron manufacturer: Other Similar products are found below : AS-24.576-18 A-1.8432-18 COM2305-25.000-EXT A-14.7456-18 AS-4.000-20-SMD-TR RST-W2-P-N-E AS-27.000-18 CO4605-125.000- EXT-T-TR CO2520-8.000-33-50-X CO4305-12.000-EXT AS-9.8304-18 VC7250A-LZ-100 RH100-10.000-18-3030-EXT H10S-25.000-18- F-3030-EXT CO4305-24.000-EXT-T-TR A-16.000-18 AS-14.31818-18 H13-16.384-18-F-3030-EXT H13-24.000-18-F-3030-EXT R1612- 27.120-8-F-3030-EXT RST-W1A4-17512-22M-H-001 CO2016-10.000-3.3-50 AS-12.000-18 TU2045A-LZ-0.28-19.440-S3-3 RH100- 12.000-18-3030-EXT RST-MB-15338-22-G-001 CO1100-32.000 AS-20.000-18SMDT A-2.000-18 AS-25.000-18 H130B-24.000-18-3030- EXT CO43025-50.000-EXT-T-TR AS-4.000-18-SMD-TR RSE-32.768-12.5-C CE8450B-LZ-125.000-T-4 AS-14.31818-18-SMD A-10.000- 18 AS-6.000-18 A-24.000-18 A-11.0592-18 AS-12.000-20 CO1100-10.000 A-7.3728-18 CO12100-16.000MHZ CO1100-7.3728 CO1100- 24.000 A-2.4576-18 AS-4.000-20 AS-8.000-18 AS-5.000-18-EXT-SMD-TR