Favorite BJT transistors, sot-23 and TO-92 equivalents - I
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From: Jim Thompson on 31 Jan 2010 15:26 On 31 Jan 2010 10:51:43 -0800, Winfield Hill <Winfield_member(a)newsguy.com> wrote: > > Working on a table for our book, soliciting your > opinions, info and advice. For example, try these: > > '3904 ans '3906 = jellybean? Absolutely! Probably the most popular general purpose NPN/PNP pair around. > > 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? '2369 is a gold-doped NPN made for switching purposes (dating to my youth :-). I don't know of a complement. > > 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. Raytheon CK722 ?:-) ...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 15:37 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? -- Thanks, - Win
From: Winfield Hill on 31 Jan 2010 15:45 Hammy wrote... > > NPN - BC817 > http://www.nxp.com/acrobat_download/datasheets/BC817_BC817W_BC337_5.pdf > > PNP Complement - BC807 > http://www.nxp.com/acrobat_download/datasheets/BC807_BC807W_BC327_5.pdf > > Jelly beans about the same price as 3904-06's Yep, and good for higher currents. Nice beta curves at low Ic. -- Thanks, - Win
From: Jim Thompson on 31 Jan 2010 15:48 On 31 Jan 2010 12:37:43 -0800, Winfield Hill <Winfield_member(a)newsguy.com> wrote: >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? Win, I don't have an absolute answer for that, but I think they still are. > > Do IC fabs often use gold doping? Original-flavor TTL is still gold doped. But Schottky versions don't need storage control (lifetime killing) doping. Naturally, CMOS doesn't have saturation in the bipolar sense... quite a God-send for many of my designs. ECL, MECL, PECL avoid the issue by simply being current steering only. >(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? I'll ask around. ...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: JeffM on 31 Jan 2010 16:15
Jim Thompson wrote: >Winfield Hill wrote: >>Your favorite candidates are solicited. >> >Raytheon CK722 ?:-) How do you clean off the Cosmoline? |