click to buy information furnished by linear integrated systems and micross components is believed to be accurate and reliable. however, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of linear integrated systems. micross components ltd, united kingdom, te l: +44 1603 788967, fax: +44 1603788920, email: chipcomponents@micross.com web: www.micross.com/distribution.aspx features ? direct ? replacement ? for ? siliconix ? u308 ? outstanding ? high ? frequency ? gain ?? g pg = ? 11.5db ? low ? high ? frequency ? noise ? nf ? = ? 2.7db ? absolute ? maximum ? ratings ? @ ? 25c 1 ? ? maximum ? temperatures ? storage ? temperature ?\ 55c ? to ? +150c ? operating ? junction ? temperature ?\ 55c ? to ? +135c ? maximum ? power ? dissipation ? continuous ? power ? dissipation ?? 500mw ? maximum ? current gate ? current ? 10ma ? maximum ? voltages ? gate ? to ? drain ? voltage ? or ?? gate ? to ? source ? voltage ??\ 25v ? ?? ?? u308 ? electrical ? characteristics ? @ ? 25c ? (unless ? otherwise ? noted) symbol ? characteristic ? min ? typ. ? max ? unit ? conditions ? bv gss ? gate ? to ? source ? breakdown ? voltage ?\ 25 ? \\? \\? v ? v ds ? = ? 0v, ? i g ? = ?\ 1a ? v gs ( f ) ? gate ? to ? source ? forward ? voltage ? 0.7 ? \\? 1 ? v ds ? = ? 0v, ? i g ? = ? 10ma ? v gs ( off ) ? gate ? to ? source ? cutoff ? voltage ?\ 1 ? \\? \ 6.5 ? v ds ? = ? 10v, ?? i d ? = ? 1na ? i dss ? drain ? to ? source ? saturation ? current 2 ? 12 ? \\? 60 ? ma ? v ds ? = ? 10v, ? v gs ? = ? 0v ? i g ? gate ? operating ? current ? (note ? 3) ? \\? \ 15 ? \\? pa ? v dg ? = ? 9v, ?? i d ? = ? 10ma ? r ds ( on ) ? drain ? to ? source ? on ? resistance ? \\? 35 ? \\? ? v gs ? = ? 0v, ?? i d ? = ? 1ma ? ??????? u308 ? dynamic ? electrical ? characteristics ? @ ? 25c ? (unless ? otherwise ? noted) ? symbol ? characteristic ? min ? typ. ? max ? unit ? conditions ? g fs ? forward ? transconductance ? 8 ? 14 ? \\? ms ? v ds ? = ? 10v, ??? i d ? = ? 10ma ? , ? f ? = ? 1khz ? g os ? output ? conductance ? \\? 110 ? 250 ? s ? c iss ? input ? capacitance ? \\? 4 ? 5 ? pf ? v ds ? = ? 10v, ??? v gs ? = ?\ 10v ? , ? f ? = ? 1mhz ?? c rss ? reverse ? transfer ? capacitance ? \\? 1.9 ? 2.5 ? e n ? equivalent ? noise ? voltage ? 6 ? \\? \\? nv/ hz ? v ds ? = ? 10v, ???? i d ? = ? 10ma ? , ?? f ? = ? 100hz ? ??????? u308 ? high ? frequency ? characteristics ? @ ? 25c ? (unless ? otherwise ? noted) ? symbol ? characteristic ? min ? typ ? max ? unit ? conditions ? nf ? noise ? figure ? f ? = ? 105mhz ? \\? 1.5 ? \\? db ?? ? ? ? v ds ? = ? 10v, ???? i d ? = ? 10ma ? f ? = ? 450mhz ? \\? 2.7 ? \\? db ? g pg ? power ? gain 3 ? f ? = ? 105mhz ? \\? 16 ? \\? ? f ? = ? 450mhz ? \\? 11.5 ? \\? ? g fg ? forward ? transconductance ? f ? = ? 105mhz ? \\? 14 ? \\? ? ? ms ? f ? = ? 450mhz ? \\? 13 ? \\? g og ? output ? conductance ? f ? = ? 105mhz ? \\? 0.16 ? \\? f ? = ? 450mhz ? \\? 0.55 ? \\? ??? ??? ??? ??? ??? u308 n-channel jfet linear s y stems re p laces discontinued siliconix u308 the u308 is a high frequency n-channel jfet offering a wide range and low noise performance. the hermetically sealed to-18 package is well suited for high reliability and harsh environment applications. (see packaging information). u308 applications: ? uhv / vhf amplifiers ? mixers ? oscillators u308 benefits: ? high power low noise gain ? dynamic range greater than 100db ? easil y matched to 75 ? in p ut micross components europe available packages: u308 in to-18 u308 in bare die. please contact micross for full package and die dimensions note ? 1 ?\? absolute ? maximum ? ratings ? are ? limiting ? values ? above ? which ? u308 serviceability ? may ? be ? impaired. ?? note ? 2 ?\? pulse ? test ? : ? pw ?? 300s, ? duty ? cycle ?? 3% ? note ? 3 ?\? measured ? at ? optimum ? input ? noise ? match ? tel: +44 1603 788967 email: chipcomponents@micross.com web: http://www.micross.com/distribution to-18 (bottom view)
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