BF420 small signal npn transistor preliminary data n silicon epitaxial planar npn high voltage transistor n to-92 package suitable for through-hole pcb assembly n the pnp complementary type is bf421 applications n video amplifier circuits (rgb cathode current control) n telephone wireline interface (hook switches, dialer circuits) ? internal schematic diagram february 2003 absolute maximum ratings symbol parameter value unit v cbo collector-base voltage (i e = 0) 300 v v ceo collector-emitter voltage (i b = 0) 300 v v ebo emitter-base voltage (i c = 0) 5 v i c collector current 500 ma i cm collector peak current (t p < 5 ms) 600 ma p tot total dissipation at t c = 25 o c 830 mw t stg storage temperature -65 to 150 o c t j max. operating junction temperature 150 o c ordering code marking package / shipment BF420 BF420 to-92 / bulk BF420-ap BF420 to-92 / ammopack to-92 bulk to-92 ammopack 1/5
thermal data r thj-amb r thj-case thermal resistance junction-ambient max thermal resistance junction-case max 150 50 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 cbo collector cut-off current (i e = 0) v cb = 200 v v cb = 200 v t c = 150 o c v cb = 300 v 10 10 100 na m a m a i ebo emitter cut-off current (i c = 0) v eb = 5 v 50 na v (br)ceo * collector-emitter breakdown voltage (i b = 0) i c = 10 ma 300 v v (br)cbo collector-base breakdown voltage (i e = 0) i c = 100 m a 300 v v (br)ebo emitter-base breakdown voltage (i c = 0) i e = 100 m a 5v v ce(sat) * collector-emitter saturation voltage i c = 30 ma i b = 5 ma 0.6 v v be(sat) * base-emitter saturation voltage i c = 30 ma i b = 5 ma 1.2 v h fe * dc current gain i c = 25 ma v ce = 20 v 50 f t transition frequency i c = 10 ma v ce = 10 v f =20 mhz 60 mhz c cbo collector-base capacitance i e = 0 v cb = 10 v f = 1mhz 6 pf c ebo emitter-base capacitance i c = 0 v eb = 2 v f = 1mhz 22 pf * pulsed: pulse duration = 300 m s, duty cycle 2 % BF420 2/5
dim. mm inch min. typ. max. min. typ. max. a 4.32 4.95 0.170 0.195 b 0.36 0.51 0.014 0.020 d 4.45 4.95 0.175 0.194 e 3.30 3.94 0.130 0.155 e 2.41 2.67 0.095 0.105 e1 1.14 1.40 0.045 0.055 l 12.70 15.49 0.500 0.609 r 2.16 2.41 0.085 0.094 s1 1.14 1.52 0.045 0.059 w 0.41 0.56 0.016 0.022 v 4 degree 6 degree 4 degree 6 degree to-92 mechanical data BF420 3/5
dim. mm inch min. typ. max. min. typ. max. a1 4.80 0.189 t 3.80 0.150 t1 1.60 0.063 t2 2.30 0.091 d 0.48 0.019 p0 12.50 12.70 12.90 0.492 0.500 0.508 p2 5.65 6.35 7.05 0.222 0.250 0.278 f1,f2 2.44 2.54 2.94 0.096 0.100 0.116 delta h -2.00 2.00 -0.079 0.079 w 17.50 18.00 19.00 0.689 0.709 0.748 w0 5.70 6.00 6.30 0.224 0.236 0.248 w1 8.50 9.00 9.25 0.335 0.354 0.364 w2 0.50 0.020 h 18.50 20.50 0.728 0.807 h0 15.50 16.00 16.50 0.610 0.630 0.650 h1 25.00 0.984 d0 3.80 4.00 4.20 0.150 0.157 0.165 t 0.90 0.035 l 11.00 0.433 i1 3.00 0.118 delta p -1.00 1.00 -0.039 0.039 to-92 ammopack shipment (suffix"-ap") mechanical data BF420 4/5
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the consequences of use of such information 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 stmicroelectroni cs. specifi cation mentio ned in this publication are subject to change without notice. this publication supersedes and replaces all in formation previou sly supplied. stmicroe lectron ics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectron ics. the st logo is a trademark of stmicroelectronics ? 2003 stmicroelectronics C pr inted in italy C all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco - singapore - spain - sweden - switzerland - united kingdom - united states. http://www.st.com BF420 5/5
|
