BCY79 low noise audio amplifier description the BCY79 is a silicon planar epitaxial pnp transistor in jedec to-18 metal case. it is intented for use in audio input stages, driver stages and low-noise input stages. the npn complementary type is bcy59. ? internal schematic diagram december 2002 absolute maximum ratings symbol parameter value unit v ces collector-emitter voltage (v be = 0) -45 v v ceo collector-emitter voltage (i b = 0) -45 v v ebo emitter-base voltage (i c = 0) -5 v i c collector current -200 ma i b base current -20 ma p tot total dissipation at t amb 25 o c at t c 25 o c 390 1 mw w t stg storage temperature -55 to 175 o c t j max. operating junction temperature 175 o c to-18 1/6
thermal data r thj-case r thj-amb thermal resistance junction-case max thermal resistance junction-ambient max 150 450 o c/w o c/w electrical characteristics (t case = 25 o c unless otherwise specified) symbol parameter test conditions min. typ. max. unit i ces collector cut-off current (v be = 0) v ce = -35 v v ce = -35 v t c = 150 o c -2 -20 -100 -10 na na m a i cex collector cut-off current (v be = -2 v) v ce = -45 v t c = 100 o c-20 m a i ebo emitter cut-off current (i c = 0) v eb = -4 v -20 na v (br)ces collector-emitter breakdown voltage (v be = 0) i c = -10 m a -45 v v (br)ceo * collector-emitter breakdown voltage (i b = 0) i c = -2 ma -45 v v (br)ebo emitter-base breakdown voltage (i c = 0) i e = -1 m a -5 v v ce(sat) * collector-emitter saturation voltage i c = -10 ma i b = -0.25 ma i c = -100 ma i b = -2.5 ma -0.12 -0.4 -0.25 -0.8 v v v be(sat) * base-emitter saturation voltage i c = -10 ma i b = -0.25 ma i c = -100 ma i b = -2.5 ma -0.6 -0.7 -0.7 -0.85 -0.85 -1.2 v v v be(on) * base-emitter (on) voltage i c = -10 m a v ce = -5 v i c = -2 ma v ce = -5 v i c = -10 ma v ce = -1 v i c = -100 ma v ce = -1 v -0.6 -0.55 -0.65 -0.68 -0.75 -0.75 v v v v h fe * dc current gain i c = -10 m a v ce = -5 v gr. viii gr. ix gr. x i c = -2 ma v ce = -5 v gr. viii gr. ix gr. x i c = -10 ma v ce = -1 v gr. viii gr. ix gr. x i c = -100 ma v ce = -1 v gr. viii gr. ix gr. x 30 40 100 180 250 380 120 160 240 45 60 60 200 270 340 250 350 500 260 360 500 310 460 630 400 630 1000 h fe * small signal current gain i c = -2 ma v ce = -5 v f = 1 khz gr. viii gr. ix gr. x 175 250 350 260 330 520 350 500 700 f t transition frequency i c = -10 ma v ce = -5 v f = 100 mhz 180 mhz * pulsed: pulse duration = 300 m s, duty cycle 1 % BCY79 2/6
electrical characteristics (t case = 25 o c unless otherwise specified) symbol parameter test conditions min. typ. max. unit c cbo collector-base capacitance i e = 0 v cb = -10 v f = 1mhz 4.5 7 pf c ebo emitter-base capacitance i c = 0 v eb = -0.5 v f = 1mhz 11 15 pf nf noise figure i c = -0.2 ma v ce = -5 v f = 1khz r g = 2k w d f = 200hz 26db h ie input impedance i c = -2 ma v ce = -5 v f = 1 khz gr. viii gr. ix gr. x 3.6 4.5 7.5 k w k w k w h re reverse voltage ratio i c = -2 ma v ce = -5 v f = 1 khz gr. viii gr. ix gr. x 2 2 3 10 -4 10 -4 10 -4 h oe output admittance i c = -2 ma v ce = -5 v f = 1 khz gr. viii gr. ix gr. x 24 30 50 50 60 100 m s m s m s t d delay time v cc = -10 v i c = -10 ma i b1 = - 1 ma i c = -100 ma i b1 = - 10 ma 50 50 ns ns t r rise time v cc = -10 v i c = -10 ma i b1 = -1 ma i c = -100 ma i b1 = -10 ma 35 5 ns ns t s storage time v cc = -10 v i c = -10 ma i b1 = - i b2 = 1 ma i c = -100 ma i b1 = - i b2 = 10 ma 400 250 ns ns t f fall time v cc = -10 v i c = -10 ma i b1 = - i b2 = 1 ma i c = -100 ma i b1 = - i b2 = 10 ma 80 200 ns ns t on turn-on time v cc = -10 v i c = -10 ma i b1 = -1 ma i c = -100 ma i b1 = -10 ma 85 55 150 150 ns ns t off turn-off time v cc = -10 v i c = -10 ma i b1 = - i b2 = 1 ma i c = -100 ma i b1 = - i b2 = 10 ma 480 480 800 800 ns ns BCY79 3/6
collector-emitter saturation voltage dc current gain noise figure vs. frequency base-emitter saturation voltage normalized h parameters noise figure (f = 1 khz) BCY79 4/6
dim. mm inch min. typ. max. min. typ. max. a 12.7 0.500 b 0.49 0.019 d 5.3 0.208 e4.9 0.193 f 5.8 0.228 g 2.54 0.100 h1.2 0.047 i 1.16 0.045 l45 o 45 o l g i d a f e b h c to-18 mechanical data 0016043 BCY79 5/6
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