824.25 mhz two-port saw resonator phone: +86 10 6301 4184 fax: +86 10 6301 9167 email: sales@vanlong.com web: http://www.va nlong.com ? 2004 by vanlong technology co., ltd. sq433 ? ideal for 824.25 mhz transmitters ? nominal phase shift of 180 at resonance ? quartz stability ? rugged, hermetic, low profile to-39 package absolute maximum rating (ta=25 c) parameter rating unit cw rf power dissipation p 10 dbm dc voltage v dc 30 v operating temperature range t a -10 ~ +60 c storage temperature range t stg -40 ~ +85 c electronic characteristics parameter sym minimum typical maximum unit frequency (25 c) nominal frequency tolerance from 824.25 mhz f c ? f c ns - 824.25 - ns 150 mhz khz insertion loss il - 6.0 8.0 db quality factor unloaded q-value 50 ? loaded q-value q u q l - - 6,020 3,000 - - - - temperature stability turnover temperature turnover frequency frequency temperature coefficient t o f o ftc 25 - - - fc -0.032 55 - - c khz ppm/ c 2 frequency aging absolute value during the first year |f a | - - 10 ppm/yr dc insulation resistance between any two pins - 1.0 - - m ? rf equivalent rlc model motional resistance motional inductance motional capacitance pin 1 to pin 2 static capacitance r m l m c m c o - - - 2.1 99.5 115.6234 0.3228 2.4 151.0 - - 2.7 ? h ff pf ns = not specified notes: 1. the center frequency, f c , is measured at the minimum il point with the resonator in the 50 ? test system. 2. unless noted otherwise, case temperature t c = +25 c 2 c. 3. frequency aging is the change in f c with time and is specified at +65 c or less. aging may exceed the specification for prolonged temperatures above +65c. typically, aging is greatest the first year after manufacture, decreasing in subsequent years. 4. turnover temperature, t 0 , is the temperature of maximum (or turnover) frequency, f 0 . the nominal frequency at any case temperature, t c , may be calculated from: f = f 0 [1 - ftc ( t 0 - t c ) 2 ]. 5. this equivalent rlc model approximates resonator performance near the resonant frequency and is provided for reference only. the capacitance c 0 is the measured static (nonmotional) capacitance between pin1 and pin2. the measurement includes case parasitic capacitance. 6. derived mathematically from one or more of the following directly measured parameters: f c , il , 3 db bandwidth, f c versus t c , and c 0 . 7. the specifications of this device are based on the test circuit shown above and subject to change or obsolescence without notice. 8. typically, equipment utilizing this device requires emissions testing and government approval, which is the responsibility of the equipment manufacturer. 9. our liability is only assumed for the surface acoustic wave (saw) component(s) per se, not for applications, processes and circuits implemented within components or assemblies. 10. for questions on technology, prices and delivery please contact our sales offices or e-mail to sales@vanlong.com. SQ824
824.25 mhz two-port saw resonator phone: +86 10 6301 4184 fax: +86 10 6301 9167 email: sales@vanlong.com web: http://www.va nlong.com ? 2004 by vanlong technology co., ltd. sq433 package dimensions (to-39) marking equivalent lc model and test circuit typical application circuit typical frequency response temperature characteristics electrical connections terminals connection 1 input/ output 2 output/ input 3 case-ground package dimensions nom (mm) dimensions min max a 9.10 9.50 b 3.20 3.60 c 2.80 3.20 d 0.25 0.65 e 4.98 5.18 f 2.54 nominal g 0.4 0.5 ? t= t c ?t o ( c) the curve shown above accounts for resonator contribution only and does not include oscillator temperature characteristics. (f - f o )/f o (ppm) f c = f o , t c = t o low power transmitter application SQ824 824.25 local oscillator application from 50 ? ?
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