TUNING FORK QUARTZ CRYSTAL FEATURES Miniature Package Low Cost KHz Frequency Tight Tolerance The tuning fork type quartz crystal provides ultimate in size, performance, and economic trade-offs. So it is used as a clock source in communication equipment, measuring instrument, microprocessor and other time management application. Crystal Units TC-26 & NC-38 Series Electrical Specifications Symb FO F/ FO K TOPR TSTG CO C1 CL IR DL Fa Parameter Frequency Range Frequency Tolerance Temperature Cofficient Operating Temperature Range Storage Temperature Range Shunt Capacitance Motional Capacitance Load Capacitance Insulation Resistance Drive Level Aging(First year) Equivalent Series Resistance(ESR) RS Condition Typ 32.768 20 Min 30 10 AT 25 REF TO 25 Max 100 100 -0.042 +60 +70 2 4 Series -10 -20 0.85 2 12.5 1 6 500 100VDC AT 25 3 DT-38 DT-26 Units KHz ppm ppm/( pF fF pF M W ppm 1 +5.0 35 50 -5.0 2 ) K K Mechanical Dimensions(mm) TC-26 Parabolic Temperature Curve 6.3Max 0.20 0.076( T( -20 2) 2.1Max -10 0 10 20 30 40 50 60 70 0.65 4.0Min -10 -20 -30 NC-38 8.28Max 0.30 0.076( -40 2) 3.1Max -50 0.80 9.0Min -60 F/f(ppm) To determine frequency stability , use parabolic curvature(k). For example: What is stability at 45 1).change in T( )=45-25=20 2).Change in frequency = -0.042ppm*( )2 = -0.042ppm*(20)2 = -16.8ppm(max) 4 RSG RSG Electronic Components GmbH Sprendlinger Landstr. 115 D-63069 Offenbach/Germany Tel. +49 69 984047-0 Fax +49 69 984047-77 [email protected] www.rsg-electronic.de ■ ■ ELECTRONIC COMPONENTS ■ Änderungen vorbehalten / subject to change without notice ■ ■ ■