| u na. 20 stern ave. springfield, new jersey 07081 u.s.a. telephone: (973) 376-2922 (212) 227-6005 fax: (973) 376-8960 BF254B maximum rating* parameter collector-emitter voltage collector-base voltage emitter-base voltage collector current total power dissipation, t*. s 45 "c junction temperature storage temperature range symbol vceo vca vebo k pol t\ values 20 30 5 30 250 150 -65. .. + 150 unit v ma mw ?c thermal resistance junction - ambient 420 iow figuration 1 2 3 b to-92 electrical characteristics at r* ? 25 'c, unless otherwise specified. parameter symbol vakim mln. typ. |max. unit dc characteristics dc current gain /c-1ma, vce-lov BF254B base-emitter voltage /c-1 ma, vce = 10v arc vbe 110 ? 0.68 220 ? ? v ac characteristics transition frequency /o - 1 ma, vce - 10 v, /= 100 mhz bf254 collector-base capacitance vca - 10 v, vbe = 0 v,/- 1 mhz collector-emitter capacitance vce - 10 v, vge ? 0 v,/= 1 mhz noise figure 7c - 1 ma, vce ? 10 v /=1mhz,s..1.5ms') /-100mh2,*..10msd fi cob c? f ? - - 260 0.6 0.6 1.2 3.8 - - t mhz pf db y parameters, typical values, /c = 10 v / mhz common emitter 0.45 bf254 10.7 bf254 *" ms 0.3 0.4 fttt ms 0.06 1.5 l,nl ms 1.7 41 |
