Well, it happened--the last fast PNP is EOL

On 2018-06-05 06:42, Phil Hobbs wrote:
On 06/04/2018 06:08 PM, Joerg wrote:
On 2018-06-04 09:22, Phil Hobbs wrote:
On 06/04/2018 12:03 PM, Gerhard Hoffmann wrote:
Am 04.06.2018 um 17:54 schrieb Phil Hobbs:
BFT92, RIP. :(

NXP, you lousy bastards, you just took away about a quarter of my
design
space. Get 'em while they last.



https://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/transistor-arrays/HFA3096.html



Let's hope that at least _these_ stay for some time..

cheers, Gerhard


Yeah, true, there are those. Unfortunately their Rbb' and Ree' are the
pits.

I just bought Newark's last reel of BFT92s, so we'll be okay for our own
stuff, but I can't use them in custom or licensed designs any more.

Which is a great pity--fast PNP wraparounds are good for a lot of
things.


Digikey has several reels:

https://www.digikey.com/product-detail/en/nxp-usa-inc/BFT92215/568-1655-2-ND/763259


You could buy some, put them in a nitrogen cabinet and 10 years down
the road less the individual transistors at auction for $5 a pop :)


They're still available from NXP till November, though I don't know how
many more wafers they'll actually be processing.

One reel is probably enough for my needs, but this move puts some of my
customers in a bit of a jam. I just got a call this morning to redesign
a circuit from a year or two back, and I expect there'll be more. Not
the sort of new business I'm most fond of.

NXP. What a bunch of morons.
Click to expand...

If its any comfort I used a class-D driver IC from another manufacturer
in an unorthodox fashion, as a lab bench device to drive large
capacitive loads fast. Meaning ordinary class-D driver chips won't cut
it. Yesterday a client asked me how to turn this module into a smaller
version and get it into production for other purposes. Needless to say,
this IC has been obsoleted. Harumph!

Guess we are in the same boat again :)

--
Regards, Joerg

http://www.analogconsultants.com/
 
On 06/04/2018 08:40 PM, Jim Thompson wrote:
On Mon, 4 Jun 2018 14:49:00 -0700 (PDT), Lasse Langwadt Christensen
langwadt@fonz.dk> wrote:

mandag den 4. juni 2018 kl. 23.42.01 UTC+2 skrev Jim Thompson:
On 4 Jun 2018 14:04:31 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

bitrex wrote...


Should start a s.e.d. fabless semiconductor company and get them made
again, China will make whatever you like. You could advertise it as
exactly that "The Last Fast PNP" like the Last of the Mohicans or something.

It's be nice to have it available in a SOT-323 SC70 package.

Maybe you and Hobbs should buy a wafer or two? Then, as time moves
on, package them to suit the era?


digikey has 18000 in stock, $2,835 for 15000 how many wafers can you get for that?


Discrete device wafers are dirt-cheap and low profitability. That's
why the devices are being phased out. Was anyone besides Hobbs buying
them?

...Jim Thompson
Click to expand...

They sell for a lot more than digital transistors or BCX71s, and can't
be much harder to make. Nexperia didn't take NXP's rf transistors or
JFETs, so they're getting rid of them.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
 
On Tue, 05 Jun 2018 07:03:11 -0700, Joerg <news@analogconsultants.com>
wrote:

On 2018-06-05 06:42, Phil Hobbs wrote:
On 06/04/2018 06:08 PM, Joerg wrote:
On 2018-06-04 09:22, Phil Hobbs wrote:
On 06/04/2018 12:03 PM, Gerhard Hoffmann wrote:
Am 04.06.2018 um 17:54 schrieb Phil Hobbs:
BFT92, RIP. :(

NXP, you lousy bastards, you just took away about a quarter of my
design
space. Get 'em while they last.



https://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/transistor-arrays/HFA3096.html



Let's hope that at least _these_ stay for some time..

cheers, Gerhard


Yeah, true, there are those. Unfortunately their Rbb' and Ree' are the
pits.

I just bought Newark's last reel of BFT92s, so we'll be okay for our own
stuff, but I can't use them in custom or licensed designs any more.

Which is a great pity--fast PNP wraparounds are good for a lot of
things.


Digikey has several reels:

https://www.digikey.com/product-detail/en/nxp-usa-inc/BFT92215/568-1655-2-ND/763259


You could buy some, put them in a nitrogen cabinet and 10 years down
the road less the individual transistors at auction for $5 a pop :)


They're still available from NXP till November, though I don't know how
many more wafers they'll actually be processing.

One reel is probably enough for my needs, but this move puts some of my
customers in a bit of a jam. I just got a call this morning to redesign
a circuit from a year or two back, and I expect there'll be more. Not
the sort of new business I'm most fond of.

NXP. What a bunch of morons.


If its any comfort I used a class-D driver IC from another manufacturer
in an unorthodox fashion, as a lab bench device to drive large
capacitive loads fast. Meaning ordinary class-D driver chips won't cut
it. Yesterday a client asked me how to turn this module into a smaller
version and get it into production for other purposes. Needless to say,
this IC has been obsoleted. Harumph!

Guess we are in the same boat again :)
Click to expand...

Given the choice, TI is our preferred vendor, because they tend to
keep stuff in production. Conversely, we avoid NXP.

I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

TI has some nice class-D amps.


--

John Larkin Highland Technology, Inc

lunatic fringe electronics
 
On 2018-06-05 09:02, John Larkin wrote:
On Tue, 05 Jun 2018 07:03:11 -0700, Joerg <news@analogconsultants.com
wrote:

On 2018-06-05 06:42, Phil Hobbs wrote:
On 06/04/2018 06:08 PM, Joerg wrote:
On 2018-06-04 09:22, Phil Hobbs wrote:
On 06/04/2018 12:03 PM, Gerhard Hoffmann wrote:
Am 04.06.2018 um 17:54 schrieb Phil Hobbs:
BFT92, RIP. :(

NXP, you lousy bastards, you just took away about a quarter of my
design
space. Get 'em while they last.



https://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/transistor-arrays/HFA3096.html



Let's hope that at least _these_ stay for some time..

cheers, Gerhard


Yeah, true, there are those. Unfortunately their Rbb' and Ree' are the
pits.

I just bought Newark's last reel of BFT92s, so we'll be okay for our own
stuff, but I can't use them in custom or licensed designs any more.

Which is a great pity--fast PNP wraparounds are good for a lot of
things.


Digikey has several reels:

https://www.digikey.com/product-detail/en/nxp-usa-inc/BFT92215/568-1655-2-ND/763259


You could buy some, put them in a nitrogen cabinet and 10 years down
the road less the individual transistors at auction for $5 a pop :)


They're still available from NXP till November, though I don't know how
many more wafers they'll actually be processing.

One reel is probably enough for my needs, but this move puts some of my
customers in a bit of a jam. I just got a call this morning to redesign
a circuit from a year or two back, and I expect there'll be more. Not
the sort of new business I'm most fond of.

NXP. What a bunch of morons.


If its any comfort I used a class-D driver IC from another manufacturer
in an unorthodox fashion, as a lab bench device to drive large
capacitive loads fast. Meaning ordinary class-D driver chips won't cut
it. Yesterday a client asked me how to turn this module into a smaller
version and get it into production for other purposes. Needless to say,
this IC has been obsoleted. Harumph!

Guess we are in the same boat again :)

Given the choice, TI is our preferred vendor, because they tend to
keep stuff in production. Conversely, we avoid NXP.
Click to expand...

Depends. Decades ago some engineers used the expression "Texan call-off"
and I got involved in an urgent redesign because some kind of logamp had
suddenly been discontinued.


I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

TI has some nice class-D amps.
Click to expand...

I'll have to look at them again, ours was from Infineon. Problem is, we
need 200V abs max for swing.

A company that made it onto my blacklist recently is Broadcom after they
obsoleted a whole slew of discretes.

--
Regards, Joerg

http://www.analogconsultants.com/
 
On Tue, 5 Jun 2018 10:56:25 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

On 06/04/2018 08:40 PM, Jim Thompson wrote:
On Mon, 4 Jun 2018 14:49:00 -0700 (PDT), Lasse Langwadt Christensen
langwadt@fonz.dk> wrote:

mandag den 4. juni 2018 kl. 23.42.01 UTC+2 skrev Jim Thompson:
On 4 Jun 2018 14:04:31 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

bitrex wrote...


Should start a s.e.d. fabless semiconductor company and get them made
again, China will make whatever you like. You could advertise it as
exactly that "The Last Fast PNP" like the Last of the Mohicans or something.

It's be nice to have it available in a SOT-323 SC70 package.

Maybe you and Hobbs should buy a wafer or two? Then, as time moves
on, package them to suit the era?


digikey has 18000 in stock, $2,835 for 15000 how many wafers can you get for that?


Discrete device wafers are dirt-cheap and low profitability. That's
why the devices are being phased out. Was anyone besides Hobbs buying
them?

...Jim Thompson


They sell for a lot more than digital transistors or BCX71s, and can't
be much harder to make. Nexperia didn't take NXP's rf transistors or
JFETs, so they're getting rid of them.

Cheers

Phil Hobbs
Click to expand...

The EOL of discretes does keep fast circuit design interesting. GaN
parts are cheap and fast, but don't come in P-channel!


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
 
John Larkin <jjlarkin@highlandtechnology.com> wrote:
...
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.
Click to expand...

I wondered that the military sector kept calm about the obsolation...
--
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 1623569 ------- Fax. 06151 1623305 ---------
 
On Tue, 05 Jun 2018 12:22:47 -0700, Joerg <news@analogconsultants.com>
wrote:

On 2018-06-05 12:19, Jim Thompson wrote:
On Tue, 5 Jun 2018 18:38:27 +0000 (UTC), Uwe Bonnes
bon@hertz.tu-darmstadt.de> wrote:

John Larkin <jjlarkin@highlandtechnology.com> wrote:
..
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

I wondered that the military sector kept calm about the obsolation...

Most of my chip designs, transferred to Lansdale, are on the military
preferred components list... they seem to love unconditionally stable
OpAmps, even if the open-loop gain is only 75dB... though I'm sure the
sliding-class-A outputs and 10V/us slew-rates grab their attention as
well ;-)


Any radhard opamps in there with CM input range to the negative rail and
output to neg rail with pull-down? Will need that soon.
Click to expand...

Not from my just-out-of-school era.

Today, I can easily design that for you... processing by X-Fab.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.

"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
 
On Tue, 5 Jun 2018 15:07:16 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

[snip]
The EOL of discretes does keep fast circuit design interesting. GaN
parts are cheap and fast, but don't come in P-channel!



Yeah, it's like doing chip design circa 1975--the NPNs are 100 times
faster than the PNPs. :(

[snip]
Click to expand...

That's stretching history just a tweak... PNP's back then were
_laterals_ ... 1MHz GBW product, if you were lucky.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.

"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
 
On 2018-06-05 12:19, Jim Thompson wrote:
On Tue, 5 Jun 2018 18:38:27 +0000 (UTC), Uwe Bonnes
bon@hertz.tu-darmstadt.de> wrote:

John Larkin <jjlarkin@highlandtechnology.com> wrote:
..
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

I wondered that the military sector kept calm about the obsolation...

Most of my chip designs, transferred to Lansdale, are on the military
preferred components list... they seem to love unconditionally stable
OpAmps, even if the open-loop gain is only 75dB... though I'm sure the
sliding-class-A outputs and 10V/us slew-rates grab their attention as
well ;-)
Click to expand...

Any radhard opamps in there with CM input range to the negative rail and
output to neg rail with pull-down? Will need that soon.

--
Regards, Joerg

http://www.analogconsultants.com/
 
On Tue, 5 Jun 2018 15:05:39 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

On 06/05/2018 12:02 PM, John Larkin wrote:
On Tue, 05 Jun 2018 07:03:11 -0700, Joerg <news@analogconsultants.com
wrote:

On 2018-06-05 06:42, Phil Hobbs wrote:
On 06/04/2018 06:08 PM, Joerg wrote:
On 2018-06-04 09:22, Phil Hobbs wrote:
On 06/04/2018 12:03 PM, Gerhard Hoffmann wrote:
Am 04.06.2018 um 17:54 schrieb Phil Hobbs:
BFT92, RIP. :(

NXP, you lousy bastards, you just took away about a quarter of my
design
space. Get 'em while they last.



https://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/transistor-arrays/HFA3096.html



Let's hope that at least _these_ stay for some time..

cheers, Gerhard


Yeah, true, there are those. Unfortunately their Rbb' and Ree' are the
pits.

I just bought Newark's last reel of BFT92s, so we'll be okay for our own
stuff, but I can't use them in custom or licensed designs any more.

Which is a great pity--fast PNP wraparounds are good for a lot of
things.


Digikey has several reels:

https://www.digikey.com/product-detail/en/nxp-usa-inc/BFT92215/568-1655-2-ND/763259


You could buy some, put them in a nitrogen cabinet and 10 years down
the road less the individual transistors at auction for $5 a pop :)


They're still available from NXP till November, though I don't know how
many more wafers they'll actually be processing.

One reel is probably enough for my needs, but this move puts some of my
customers in a bit of a jam. I just got a call this morning to redesign
a circuit from a year or two back, and I expect there'll be more. Not
the sort of new business I'm most fond of.

NXP. What a bunch of morons.


If its any comfort I used a class-D driver IC from another manufacturer
in an unorthodox fashion, as a lab bench device to drive large
capacitive loads fast. Meaning ordinary class-D driver chips won't cut
it. Yesterday a client asked me how to turn this module into a smaller
version and get it into production for other purposes. Needless to say,
this IC has been obsoleted. Harumph!

Guess we are in the same boat again :)

Given the choice, TI is our preferred vendor, because they tend to
keep stuff in production. Conversely, we avoid NXP.

I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

TI has some nice class-D amps.


Maybe we could get THAT or somebody to do them.

Cheers

Phil Hobbs
Click to expand...

"THAT" is a possibility ;-) I did a number of audio things for them,
MANY moons ago... using those Intersil (?) wire-up-only chips.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.

"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
 
On Tue, 5 Jun 2018 18:38:27 +0000 (UTC), Uwe Bonnes
<bon@hertz.tu-darmstadt.de> wrote:

John Larkin <jjlarkin@highlandtechnology.com> wrote:
..
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

I wondered that the military sector kept calm about the obsolation...
Click to expand...

Most of my chip designs, transferred to Lansdale, are on the military
preferred components list... they seem to love unconditionally stable
OpAmps, even if the open-loop gain is only 75dB... though I'm sure the
sliding-class-A outputs and 10V/us slew-rates grab their attention as
well ;-)

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.

"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
 
On Mon, 4 Jun 2018 23:18:16 -0400, "tom" <tmiller11147@verizon.net>
wrote:

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote in
message news:4psbhdloovifoq9s67h0n5s734e374g5vc@4ax.com...
On Mon, 04 Jun 2018 18:02:47 -0700, John Larkin
jjlarkin@highland_snip_technology.com> wrote:

On Mon, 04 Jun 2018 17:40:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> wrote:

On Mon, 4 Jun 2018 14:49:00 -0700 (PDT), Lasse Langwadt Christensen
langwadt@fonz.dk> wrote:

mandag den 4. juni 2018 kl. 23.42.01 UTC+2 skrev Jim Thompson:
On 4 Jun 2018 14:04:31 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

bitrex wrote...


Should start a s.e.d. fabless semiconductor company and get them
made
again, China will make whatever you like. You could advertise it as
exactly that "The Last Fast PNP" like the Last of the Mohicans or
something.

It's be nice to have it available in a SOT-323 SC70 package.

Maybe you and Hobbs should buy a wafer or two? Then, as time moves
on, package them to suit the era?


digikey has 18000 in stock, $2,835 for 15000 how many wafers can you get
for that?


Discrete device wafers are dirt-cheap and low profitability. That's
why the devices are being phased out. Was anyone besides Hobbs buying
them?

...Jim Thompson

I sure was. And a lot of SOT-89 parts, now gone too.

If the wafers are cheap, somebody could bake a crate full of them,
jack up the device prices, and do OK. And not annoy a lot of
maybe-future customers.

Look into it. Lansdale bought a lot of the rights to Moto chips...
still selling some I designed 50+ years ago.

...Jim Thompson
--

Jim, you should post a list of all the chips you designed.

Regards
Click to expand...
There aren't that many... just 18 standard products between 1962 and
1970.... and they are listed on my home page, toward the bottom.

At 1970 I fled the corporate political world (I couldn't deal with all
the political BS at Motorola... I think I quit 4-times just to force
proper engineering decisions) and went to doing virtually all
custom... with a few exceptions, like the LVDS chips for Fairchild.

(I supported my family at the time... 1970-1977, by running a hybrid
line at Dickson Electronics and writing a lot of the course material
for ICE... Integrated Circuit Engineering.)

At last count there were ~200 custom chips. I'll have to ponder and
see if I can devise a non-disclosure way of listing those devices...
and what they do functionally... if I can I'll post and announce.

In the last five years or so I've tired of chip design... there really
isn't anything analog I haven't done before >:-}... so I've hopped
into Behavioral Modeling... easy for me since I've done so much
circuit work (and my math capabilities, at least up thru Calculus, are
superb)... and it's fun, devising functional models which don't
divulge any internal IP... a lot like puzzle solving in reverse ;-)

I will be updating the "Jim's Secret Sauce" page shortly, renaming it
"Behavioral Modeling Gimmicks/Tools/Not sure yet"... with more
explanations of how I got there. Watch for it.

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Thinking outside the box... producing elegant solutions,
by understanding what nature is hiding.

"It is not in doing what you like, but in liking what you do that
is the secret of happiness." -James Barrie
 
On 06/05/2018 01:29 PM, John Larkin wrote:
On Tue, 5 Jun 2018 10:56:25 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 06/04/2018 08:40 PM, Jim Thompson wrote:
On Mon, 4 Jun 2018 14:49:00 -0700 (PDT), Lasse Langwadt Christensen
langwadt@fonz.dk> wrote:

mandag den 4. juni 2018 kl. 23.42.01 UTC+2 skrev Jim Thompson:
On 4 Jun 2018 14:04:31 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

bitrex wrote...


Should start a s.e.d. fabless semiconductor company and get them made
again, China will make whatever you like. You could advertise it as
exactly that "The Last Fast PNP" like the Last of the Mohicans or something.

It's be nice to have it available in a SOT-323 SC70 package.

Maybe you and Hobbs should buy a wafer or two? Then, as time moves
on, package them to suit the era?


digikey has 18000 in stock, $2,835 for 15000 how many wafers can you get for that?


Discrete device wafers are dirt-cheap and low profitability. That's
why the devices are being phased out. Was anyone besides Hobbs buying
them?

...Jim Thompson


They sell for a lot more than digital transistors or BCX71s, and can't
be much harder to make. Nexperia didn't take NXP's rf transistors or
JFETs, so they're getting rid of them.

Cheers

Phil Hobbs

The EOL of discretes does keep fast circuit design interesting. GaN
parts are cheap and fast, but don't come in P-channel!
Click to expand...

Yeah, it's like doing chip design circa 1975--the NPNs are 100 times
faster than the PNPs. :(

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
 
On 06/05/2018 12:02 PM, John Larkin wrote:
On Tue, 05 Jun 2018 07:03:11 -0700, Joerg <news@analogconsultants.com
wrote:

On 2018-06-05 06:42, Phil Hobbs wrote:
On 06/04/2018 06:08 PM, Joerg wrote:
On 2018-06-04 09:22, Phil Hobbs wrote:
On 06/04/2018 12:03 PM, Gerhard Hoffmann wrote:
Am 04.06.2018 um 17:54 schrieb Phil Hobbs:
BFT92, RIP. :(

NXP, you lousy bastards, you just took away about a quarter of my
design
space. Get 'em while they last.



https://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/transistor-arrays/HFA3096.html



Let's hope that at least _these_ stay for some time..

cheers, Gerhard


Yeah, true, there are those. Unfortunately their Rbb' and Ree' are the
pits.

I just bought Newark's last reel of BFT92s, so we'll be okay for our own
stuff, but I can't use them in custom or licensed designs any more.

Which is a great pity--fast PNP wraparounds are good for a lot of
things.


Digikey has several reels:

https://www.digikey.com/product-detail/en/nxp-usa-inc/BFT92215/568-1655-2-ND/763259


You could buy some, put them in a nitrogen cabinet and 10 years down
the road less the individual transistors at auction for $5 a pop :)


They're still available from NXP till November, though I don't know how
many more wafers they'll actually be processing.

One reel is probably enough for my needs, but this move puts some of my
customers in a bit of a jam. I just got a call this morning to redesign
a circuit from a year or two back, and I expect there'll be more. Not
the sort of new business I'm most fond of.

NXP. What a bunch of morons.


If its any comfort I used a class-D driver IC from another manufacturer
in an unorthodox fashion, as a lab bench device to drive large
capacitive loads fast. Meaning ordinary class-D driver chips won't cut
it. Yesterday a client asked me how to turn this module into a smaller
version and get it into production for other purposes. Needless to say,
this IC has been obsoleted. Harumph!

Guess we are in the same boat again :)

Given the choice, TI is our preferred vendor, because they tend to
keep stuff in production. Conversely, we avoid NXP.

I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

TI has some nice class-D amps.


Maybe we could get THAT or somebody to do them.
Click to expand...

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net
 
Am 05.06.2018 um 15:42 schrieb Phil Hobbs:
On 06/04/2018 06:08 PM, Joerg wrote:
On 2018-06-04 09:22, Phil Hobbs wrote:
On 06/04/2018 12:03 PM, Gerhard Hoffmann wrote:
Am 04.06.2018 um 17:54 schrieb Phil Hobbs:
BFT92, RIP. :(

NXP, you lousy bastards, you just took away about a quarter of my
design
space.  Get 'em while they last.



https://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/transistor-arrays/HFA3096.html

     

Let's hope that at least _these_ stay for some time..

cheers, Gerhard


Yeah, true, there are those.  Unfortunately their Rbb' and Ree' are the
pits.

I just bought Newark's last reel of BFT92s, so we'll be okay for our own
stuff, but I can't use them in custom or licensed designs any more.

Which is a great pity--fast PNP wraparounds are good for a lot of
things.


Digikey has several reels:

https://www.digikey.com/product-detail/en/nxp-usa-inc/BFT92215/568-1655-2-ND/763259


You could buy some, put them in a nitrogen cabinet and 10 years down
the road less the individual transistors at auction for $5 a pop :)


They're still available from NXP till November, though I don't know how
many more wafers they'll actually be processing.

One reel is probably enough for my needs, but this move puts some of my
customers in a bit of a jam.  I just got a call this morning to redesign
a circuit from a year or two back, and I expect there'll be more.  Not
the sort of new business I'm most fond of.

NXP.  What a bunch of morons.
Click to expand...

NXP: Not recommended for new designs.

Gerhard
 
On Tue, 5 Jun 2018 15:07:16 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

On 06/05/2018 01:29 PM, John Larkin wrote:
On Tue, 5 Jun 2018 10:56:25 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

On 06/04/2018 08:40 PM, Jim Thompson wrote:
On Mon, 4 Jun 2018 14:49:00 -0700 (PDT), Lasse Langwadt Christensen
langwadt@fonz.dk> wrote:

mandag den 4. juni 2018 kl. 23.42.01 UTC+2 skrev Jim Thompson:
On 4 Jun 2018 14:04:31 -0700, Winfield Hill <hill@rowland.harvard.edu
wrote:

bitrex wrote...


Should start a s.e.d. fabless semiconductor company and get them made
again, China will make whatever you like. You could advertise it as
exactly that "The Last Fast PNP" like the Last of the Mohicans or something.

It's be nice to have it available in a SOT-323 SC70 package.

Maybe you and Hobbs should buy a wafer or two? Then, as time moves
on, package them to suit the era?


digikey has 18000 in stock, $2,835 for 15000 how many wafers can you get for that?


Discrete device wafers are dirt-cheap and low profitability. That's
why the devices are being phased out. Was anyone besides Hobbs buying
them?

...Jim Thompson


They sell for a lot more than digital transistors or BCX71s, and can't
be much harder to make. Nexperia didn't take NXP's rf transistors or
JFETs, so they're getting rid of them.

Cheers

Phil Hobbs

The EOL of discretes does keep fast circuit design interesting. GaN
parts are cheap and fast, but don't come in P-channel!



Yeah, it's like doing chip design circa 1975--the NPNs are 100 times
faster than the PNPs. :(

Cheers

Phil Hobbs
Click to expand...

The PNP CK722 was the fastest transistor when I was a kid.


--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com
 
Am 05.06.2018 um 21:22 schrieb Joerg:
On 2018-06-05 12:19, Jim Thompson wrote:
On Tue, 5 Jun 2018 18:38:27 +0000 (UTC), Uwe Bonnes
bon@hertz.tu-darmstadt.de> wrote:

John Larkin <jjlarkin@highlandtechnology.com> wrote:
..
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

I wondered that the military sector kept calm about the obsolation...

Most of my chip designs, transferred to Lansdale, are on the military
preferred components list... they seem to love unconditionally stable
OpAmps, even if the open-loop gain is only 75dB... though I'm sure the
sliding-class-A outputs and 10V/us slew-rates grab their attention as
well ;-)


Any radhard opamps in there with CM input range to the negative rail and
output to neg rail with pull-down? Will need that soon.

We did use lots of OP484 :)
Click to expand...

Cheers, Gerhard
 
On 2018-06-05 12:27, Jim Thompson wrote:
On Tue, 05 Jun 2018 12:22:47 -0700, Joerg <news@analogconsultants.com
wrote:

On 2018-06-05 12:19, Jim Thompson wrote:
On Tue, 5 Jun 2018 18:38:27 +0000 (UTC), Uwe Bonnes
bon@hertz.tu-darmstadt.de> wrote:

John Larkin <jjlarkin@highlandtechnology.com> wrote:
..
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

I wondered that the military sector kept calm about the obsolation...

Most of my chip designs, transferred to Lansdale, are on the military
preferred components list... they seem to love unconditionally stable
OpAmps, even if the open-loop gain is only 75dB... though I'm sure the
sliding-class-A outputs and 10V/us slew-rates grab their attention as
well ;-)


Any radhard opamps in there with CM input range to the negative rail and
output to neg rail with pull-down? Will need that soon.

Not from my just-out-of-school era.

Today, I can easily design that for you... processing by X-Fab.
Click to expand...

I'll find some off-the-shelf from "the usual suspects", was just
wondering if there was a genuine Thompson amp around in rad-hard.

Sometimes the just out of school designs are like VW Beetles. I have one
that runs off the conveyor belt since the 90's, now in Shenzhen, no end
in sight.

--
Regards, Joerg

http://www.analogconsultants.com/
 
On 2018-06-05 13:07, Gerhard Hoffmann wrote:
Am 05.06.2018 um 21:22 schrieb Joerg:
On 2018-06-05 12:19, Jim Thompson wrote:
On Tue, 5 Jun 2018 18:38:27 +0000 (UTC), Uwe Bonnes
bon@hertz.tu-darmstadt.de> wrote:

John Larkin <jjlarkin@highlandtechnology.com> wrote:
..
I emailed ON and suggested they do some fast PNPs. They replied that
demand is too small.

I wondered that the military sector kept calm about the obsolation...

Most of my chip designs, transferred to Lansdale, are on the military
preferred components list... they seem to love unconditionally stable
OpAmps, even if the open-loop gain is only 75dB... though I'm sure the
sliding-class-A outputs and 10V/us slew-rates grab their attention as
well ;-)


Any radhard opamps in there with CM input range to the negative rail
and output to neg rail with pull-down? Will need that soon.

We did use lots of OP484 :)
Click to expand...

Though I am sure the taxpayer was ultimately on the hook for those :)

--
Regards, Joerg

http://www.analogconsultants.com/
 
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