Forums

Favorite jellybean ~HF BJT?

Started by Tim Williams December 17, 2009
2N2369 is an old standby... kind of high current (200mA), like a '3904 sped 
up about 2-3 times.  Not well specified though, I suppose because it's so 
old.  I'm thinking in the 20V, 50mA range, fT maybe 0.5-1GHz.  Like if you 
wanted to make old school RTL circuits that run as fast as 74S TTL.  MPSH11 
looks good, and '81 looks like its complement.  I've used PN3563 before 
(complement PN4258? unobtainium?).

Any favorites?

I'm not looking for SMTs or anything over 3GHz.  I'm still exploring the 
through-hole era, where it helps if the transistor doesn't oscillate on its 
own legs. :)

Tim

-- 
Deep Friar: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms 


On Thu, 17 Dec 2009 12:33:30 -0600, "Tim Williams"
<tmoranwms@charter.net> wrote:

>2N2369 is an old standby... kind of high current (200mA), like a '3904 sped >up about 2-3 times. Not well specified though, I suppose because it's so >old. I'm thinking in the 20V, 50mA range, fT maybe 0.5-1GHz. Like if you >wanted to make old school RTL circuits that run as fast as 74S TTL. MPSH11 >looks good, and '81 looks like its complement. I've used PN3563 before >(complement PN4258? unobtainium?). > >Any favorites? > >I'm not looking for SMTs or anything over 3GHz. I'm still exploring the >through-hole era, where it helps if the transistor doesn't oscillate on its >own legs. :) > >Tim
2N2369 is a GOLD-DOPED device designed primarily for low-storage-time switching ...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 | Help save the environment! Please dispose of socialism properly!
On a sunny day (Thu, 17 Dec 2009 12:33:30 -0600) it happened "Tim Williams"
<tmoranwms@charter.net> wrote in <hgdte2$1tr$1@news.eternal-september.org>:

>2N2369 is an old standby... kind of high current (200mA), like a '3904 sped >up about 2-3 times. Not well specified though, I suppose because it's so >old. I'm thinking in the 20V, 50mA range, fT maybe 0.5-1GHz. Like if you >wanted to make old school RTL circuits that run as fast as 74S TTL. MPSH11 >looks good, and '81 looks like its complement. I've used PN3563 before >(complement PN4258? unobtainium?). > >Any favorites? > >I'm not looking for SMTs or anything over 3GHz. I'm still exploring the >through-hole era, where it helps if the transistor doesn't oscillate on its >own legs. :) > >Tim > >-- >Deep Friar: a very philosophical monk. >Website: http://webpages.charter.net/dawill/tmoranwms >
BFR91, 20V Vcb, but only 12 V Vce, 50 mA, 2GHz.. low Ccb .5 pF, Cce .3 pF can be used trough hole and surface mount, seems stable here....
"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com/Snicker> 
wrote in message news:d30li5tlibm4aeivqborme6m65e1s3svtg@4ax.com...
> 2N2369 is a GOLD-DOPED device designed primarily for low-storage-time > switching
Yup. Is that all you had to say, your sentence seems to end suddenly? What's your favorite, Jim? And don't say InP monolithic, because that doesn't count. ;-) Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms
"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message 
news:hge1ti$c8t$1@news.albasani.net...
> BFR91, 20V Vcb, but only 12 V Vce, 50 mA, 2GHz.. low Ccb .5 pF, Cce .3 pF > can be used trough hole and surface mount, seems stable here....
Ewww, TO-50. Hmm, Vishay claims 5GHz, planar ground a must. And like most RF parts, it lacks DC parameters... Yeah, stable at what frequency and bandwidth? 800MHz, or wideband? ;-) Tim -- Deep Friar: a very philosophical monk. Website: http://webpages.charter.net/dawill/tmoranwms
On Thu, 17 Dec 2009 14:55:17 -0600, "Tim Williams"
<tmoranwms@charter.net> wrote:

>"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com/Snicker> >wrote in message news:d30li5tlibm4aeivqborme6m65e1s3svtg@4ax.com... >> 2N2369 is a GOLD-DOPED device designed primarily for low-storage-time >> switching > >Yup. > >Is that all you had to say, your sentence seems to end suddenly?
I was going to opine that it probably wasn't all that good for RF, but decided I wasn't sure about that ;-)
> >What's your favorite, Jim? And don't say InP monolithic, because that >doesn't count. ;-) > >Tim
XFAB XB06 BiCMOS process QNBROA (NPN ;-) ...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 | Help save the environment! Please dispose of socialism properly!
Tim Williams wrote:
> 2N2369 is an old standby... kind of high current (200mA), like a '3904 sped > up about 2-3 times. Not well specified though, I suppose because it's so > old. I'm thinking in the 20V, 50mA range, fT maybe 0.5-1GHz. Like if you > wanted to make old school RTL circuits that run as fast as 74S TTL. MPSH11 > looks good, and '81 looks like its complement. I've used PN3563 before > (complement PN4258? unobtainium?). > > Any favorites? > > I'm not looking for SMTs or anything over 3GHz. I'm still exploring the > through-hole era, where it helps if the transistor doesn't oscillate on its > own legs. :) >
Well, not much to write home about but slim pickens if you don't want SOT23: http://www.fairchildsemi.com/ds/2N/2N5770.pdf Characteristics similar to: http://www.fairchildsemi.com/ds/MM/MMBT918.pdf -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
On a sunny day (Thu, 17 Dec 2009 14:58:51 -0600) it happened "Tim Williams"
<tmoranwms@charter.net> wrote in <hge5uk$qh8$1@news.eternal-september.org>:

>"Jan Panteltje" <pNaonStpealmtje@yahoo.com> wrote in message >news:hge1ti$c8t$1@news.albasani.net... >> BFR91, 20V Vcb, but only 12 V Vce, 50 mA, 2GHz.. low Ccb .5 pF, Cce .3 pF >> can be used trough hole and surface mount, seems stable here.... > >Ewww, TO-50. Hmm, Vishay claims 5GHz, planar ground a must. And like most >RF parts, it lacks DC parameters... > >Yeah, stable at what frequency and bandwidth? 800MHz, or wideband? ;-)
I am using it as variable cap to tune a xtal osc in a camera. no special decoupling ftp://panteltje.com/pub/PAL_camera_freq_control_img_1600.jpg If your layout is sane, why should it oscillate?
> >Tim > >-- >Deep Friar: a very philosophical monk. >Website: http://webpages.charter.net/dawill/tmoranwms > > >
On a sunny day (Thu, 17 Dec 2009 14:58:51 -0600) it happened "Tim Williams"
<tmoranwms@charter.net> wrote in <hge5uk$qh8$1@news.eternal-september.org>:

BTW, here are the (LT) spice models for BFR91 and BFR96:

.MODEL BFR91 NPN ( BF=101  VAF=96  VAR=9.6  RC=9 RB=5
+RE=.149  IKF=0.25E-01  ISE=0.32E-14  TF=0.178E-10
+TR=0.13E-08  ITF=0.40E-01  VTF=0.40E+01  CJC=1.271E-12
+CJE=2.361E-12  XTI=3.0  NE=1.5  ISC=0.11E-14  EG=1.11
+XTB=1.5  BR=2.63  VJC=0.75  VJE=0.75  IS=0.35E-15
+MJC=0.33  MJE=0.33  XTF=4.0  IKR=0.25E-01  KF=0.1E-14
+NC=1.7  FC=0.50  RBM=3.5  IRB=0.35E-02  XCJC=0.5 )

.MODEL BFR96 NPN ( BF=99  VAF=120  VAR=12.0  RC=6.1 RB=2.7
+RE=.029  IKF=0.70E-01  ISE=0.90E-14  TF=0.178E-10
+TR=0.13E-08  ITF=0.67E-01  VTF=0.50E+01  CJC=1.854E-12
+CJE=1.709E-12  XTI=3.0  NE=1.5  ISC=0.30E-14  EG=1.11
+XTB=1.5  BR=2.57  VJC=0.75  VJE=0.75  IS=0.10E-14
+MJC=0.33  MJE=0.33  XTF=4.0  IKR=0.70E-01  KF=0.1E-14
+NC=1.7  FC=0.50  RBM=1.9  IRB=0.10E-01  XCJC=0.5 )

I have appended these to standard.bjt
 
On Thu, 17 Dec 2009 12:33:30 -0600, "Tim Williams"
<tmoranwms@charter.net> wrote:

>2N2369 is an old standby... kind of high current (200mA), like a '3904 sped >up about 2-3 times. Not well specified though, I suppose because it's so >old. I'm thinking in the 20V, 50mA range, fT maybe 0.5-1GHz. Like if you >wanted to make old school RTL circuits that run as fast as 74S TTL. MPSH11 >looks good, and '81 looks like its complement. I've used PN3563 before >(complement PN4258? unobtainium?). > >Any favorites? > >I'm not looking for SMTs or anything over 3GHz. I'm still exploring the >through-hole era, where it helps if the transistor doesn't oscillate on its >own legs. :) > >Tim
I like BFS17. It plenty fast but not so fast that it oscillates all on its own, like many parts do. It is surface mount, which keeps the parasitics down. BFT25, Phil Hobbs' favorite transistor, is remarkable too. John