Favorite BJT transistors, sot-23 and TO-92 equivalents - I
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From: Fred Bartoli on 31 Jan 2010 16:19 Winfield Hill a �crit : > Jim Thompson wrote... >>> '2369 ... what's a better type, PNP equiv? >> '2369 is a gold-doped NPN made for switching purposes >> (dating to my youth :-). I don't know of a complement. > > I remember in the old days we were told these were > gold-doped, and modern '2369 parts still have the > same specs. But are they still gold doped? > > Do IC fabs often use gold doping? (Yes, I know a > designer can use circuit schemes instead to reduce > storage time.) Are there other gold-doped discrete > transistors we should know about? > > The 2369 complementary is 4208/4258/5771, all sorted from the same process (National DB), and Jim should remind that I already told that him once :-) Still gold doped according to the '96 National DB. I like the 3904/3906 because of their small geometry. But when in need of higher beta the BC547/557-847/857 in B or C grade are good. For real low current, I like the 5087/5089. On the other end of the current scale, the Diodes/Zetex ZTX/FMMT618/718 family are real good, but not within Joerg's budget. BTW, Diodes has extremely interesting MOS/BJT combos (DMB53/54 in real small package) which have well controlled threshold voltage and that I'm designing in, right now, for exactly that reason. -- Thanks, Fred.
From: Martin Riddle on 31 Jan 2010 16:54 "Winfield Hill" <Winfield_member(a)newsguy.com> wrote in message news:hk4jfv0oro(a)drn.newsguy.com... > > Working on a table for our book, soliciting your > opinions, info and advice. For example, try these: > > '3904 ans '3906 = jellybean? > > MPS5179, PN5179, MMBT5179 -- what's PNP equivalent? > > BC547 NPN, sot-23 equiv = BC847, right? > BC557 PNP, sot-23 = BC857 ? > can I just show the C-grade high-beta variant? > > '2369 ... what's a better type, PNP equiv? > > and etc... > > I'm working on two tables, a short one for inclusion > within the body of the transistor chapter, and a long > one to be placed at the back of the book. Your > favorite candidates are solicited. > > > -- > Thanks, > - Win Just as common as the 2n39xx : 2n4401 & 2n4403 Cheers
From: Winfield Hill on 31 Jan 2010 17:11 Martin Riddle wrote... > > Just as common as the 2n39xx : 2n4401 & 2n4403 > Yep, those are in there. -- Thanks, - Win
From: Jim Thompson on 31 Jan 2010 17:14 On Sun, 31 Jan 2010 22:19:36 +0100, Fred Bartoli <" "> wrote: >Winfield Hill a �crit : >> Jim Thompson wrote... >>>> '2369 ... what's a better type, PNP equiv? >>> '2369 is a gold-doped NPN made for switching purposes >>> (dating to my youth :-). I don't know of a complement. >> >> I remember in the old days we were told these were >> gold-doped, and modern '2369 parts still have the >> same specs. But are they still gold doped? >> >> Do IC fabs often use gold doping? (Yes, I know a >> designer can use circuit schemes instead to reduce >> storage time.) Are there other gold-doped discrete >> transistors we should know about? >> >> > >The 2369 complementary is 4208/4258/5771, all sorted from the same >process (National DB), and Jim should remind that I already told that >him once :-) >Still gold doped according to the '96 National DB. I do recall you saying that, but that's not what I find. 2N5771 is made from Process 65, called a "complementary" process to Process 21, which IS gold-doped. That doesn't necessarily mean Process 65 is gold-doped. I do know for a fact that PNP's made in a gold-doped TTL process have absolutely crappy beta's as in ~1. That's how I won a coffee bet with Tom Frederiksen... I solved that problem and put useable PNP's on a gold-doped TTL process, see the "Thompson" current mirror configuration at... http://analog-innovations.com/SED/EnhancedCurrentMirrors.pdf > >I like the 3904/3906 because of their small geometry. >But when in need of higher beta the BC547/557-847/857 in B or C grade >are good. >For real low current, I like the 5087/5089. > >On the other end of the current scale, the Diodes/Zetex ZTX/FMMT618/718 >family are real good, but not within Joerg's budget. > >BTW, Diodes has extremely interesting MOS/BJT combos (DMB53/54 in real >small package) which have well controlled threshold voltage and that I'm >designing in, right now, for exactly that reason. ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Winfield Hill on 31 Jan 2010 17:15
Here's what I have so far in the condensed table: NPN PNP TO-92 SOT-23 TO-92 SOT-23 2N3904 MMBT3904 2N3906 MMBT3906 2N4401 MMBT4401 2N4403 MMBT4403 BC337 BC817 BC327 BC807 2N5089 MMBT5089 2N5087 MMBT5087 BC547C BC847C BC557C BC857C MPSA14 MMBTA14 MPSA64 MMBTA64 ZTX618 FMMT618 ZTX718 FMMT718 PN2369 MMBT2369 2N5771 MMBT5771 2N5550 MMBT5550 2N5401 MMBT5401 MPSA42 MMBTA42 MPSA92 MMBTA92 MPS5179 BFS17 BFT92 BFT93 TIP142 TIP147 with performance details in columns off to the right. -- Thanks, - Win |