bc857at, bt, ct pnp small signal surf ace mount transistor features ? epitaxial die construction ? complementary npn types available (bc847at,bt,ct) ? ultra-small surface mount package ? lead free/rohs compliant (note 2) ? qualified to aec-q101 standards for high reliability ? "green" device (note 4 and 5) mechanical data ? case: sot-523 ? case material - molded plastic. ul flammability classification rating 94v-0 ? moisture sensitivity: level 1 per j-std-020c ? terminals: solderable per mil-std-202, method 208 ? lead free plating (matte tin finish annealed over alloy 42 leadframe). ? terminal connections: see diagram ? marking code: see table below & diagram on page 2 ? ordering & date code information: see page 2 ? weight: 0.002 grams (approximate) ds30275 rev. 9 - 2 1 of 3 www.diodes.com bc857at, bt, ct ? diodes incorporated type marking bc857at 3v bc857bt 3w bc857ct 3g sot-523 dim min max typ a 0.15 0.30 0.22 b 0.75 0.85 0.80 c 1.45 1.75 1.60 d ? ? 0.50 g 0.90 1.10 1.00 h 1.50 1.70 1.60 j 0.00 0.10 0.05 k 0.60 0.80 0.75 l 0.10 0.30 0.22 m 0.10 0.20 0.12 n 0.45 0.65 0.50 0 8 ? all dimensi mm ons in a m j l d b c h k maximum ratings @t a = 25c unless otherwise specified characteristic symbol value unit collector-base voltage v cbo -50 v collector-emitter voltage v ceo -45 v emitter-base voltage v ebo -5.0 v collector current i c -100 ma power dissipation (note 1) p d 150 mw thermal resistance, junction to ambient (note 1) r ja 833 c/w operating and storage temperature range t j , t stg -55 to +150 c electrical characteristics @t a = 25c unless otherwise specified characteristic symbol min typ max unit test condition collector-base breakdown voltage (note 3) v (br)cbo -50 ? ? v i c = 10 a, i b = 0 collector-emitter breakdown voltage (note 3) v (br)ceo -45 ? ? v i c = 10ma, i b = 0 emitter-base breakdown voltage (note 3) v (br)ebo -5 ? ? v i e = 1 a, i c = 0 dc current gain (note 3) current gain a b c h fe 125 220 420 ? 290 520 250 475 800 ? v ce = -5.0v, i c = -2.0ma collector-emitter saturation voltage (note 3) v ce(sat) ? ? ? -300 -650 mv i c = -10ma, i b = -0.5ma i c = -100ma, i b = -5.0ma base-emitter saturation voltage (note 3) v be(sat) ? ? -700 -900 ? ? mv i c = -10ma, i b = -0.5ma i c = -100ma, i b = -5.0ma base-emitter voltage (note 3) v be(on) -600 ? ? ? -750 -820 mv v ce = -5.0v, i c = -2.0ma v ce = -5.0v, i c = -10ma collector-cutoff current (note 3) i cbo ? ? ? ? -15 -4.0 na a v cb = -30v v cb = -30v, t a = 150c gain bandwidth product f t 100 ? ? mhz v ce = -5.0v, i c = -10ma, f = 100mhz output capacitance c ob ? ? 4.5 pf v cb = -10v, f = 1.0mhz noise figure nf ? ? 10 db i c = -0.2ma, v ce = -5.0vdc, r s = 2.0k , f = 1.0khz, bw = 200hz notes: 1. device mounted on fr-4 pcb, 1 in ch x 0.85 inch x 0.062 inch; pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at http://www.diodes.com/ datasheets/ap02001.pdf. 2. no purposefully added lead 3. short duration pulse test used to minimize self-heating effect. 4. diodes inc.'s "green" policy can be found on our webs ite at http://www.diodes.com /products/lead_free/index.php. 5. product manufactured with date code uo (week 40, 2007) and newer are built with green molding compound. product manufacture d prior to date code uo are built with n on-green molding compound and may contain halogens or sb2o3 fire retardants. g top view c e b n
ds30275 rev. 9 - 2 2 of 3 www.diodes.com bc857at, bt, ct ? diodes incorporated 0 50 100 25 50 75 100 125 150 175 200 p , p o we r dissi p a t i o n (mw) d t , ambient temperature (c) fig. 1, max power dissipation vs. ambient temperature a 150 200 250 1 0.1 10 100 1,000 v, c o lle c t o r t o emi t t e r saturation voltage (v) ce(sat) i , collector current (ma) fig. 2, collector emitter saturation voltage vs. collector current c t = 25c a t = -50c a t = 150c a 0 0.1 0.2 0.3 0.4 0.5 i i c b = 10 0 10 100 1,000 1 10 100 f, g ain bandwid t h p r o d u c t (m h z) t i , collector current (ma) fig. 4, gain bandwidth product vs. collector current c v = 5v ce 1 10 100 1,000 1 10 100 1,000 v = 5v ce h, d c c u r r e n t g ai n fe i , collector current (ma) fig. 3, dc current gain vs. collector current c t = 25c a t = -50c a t = 150c a ordering information (note 6) device packaging shipping BC857AT-7-F sot-523 3000/tape & reel sot-523 3000/tape & reel bc857bt-7-f sot-523 3000/tape & reel bc857ct-7-f notes: 6. for packaging details, go to our website at http://www.diodes.com/datasheets/ap02007.pdf. marking information xxym xx = product type marking code (see page 1), e.g. 3v = bc857at ym = date code marking y = year (ex: n = 2002) m = month (ex: 9 = september) date code key year 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 code j k l m n p r s t u v w x y z month jan feb mar apr may jun jul aug sep oct nov dec code 1 2 3 4 5 6 7 8 9 o n d
ds30275 rev. 9 - 2 3 of 3 www.diodes.com bc857at, bt, ct ? diodes incorporated important notice diodes incorporated and its subsidiaries rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to any product herein. diodes incorporat ed does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its paten t rights, nor the rights of others. the user of products in such applications shall assume all risks of such use and will agree to hold diodes inco rporated and all the companies whose products ar e represented on our website, harmless against all damages. life support diodes incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the president of diodes incorporated.
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