Forums

addendum to 45-year MOSFET history, comments?

Started by Winfield Hill July 28, 2019
On 7/28/19 9:18 AM, Winfield Hill wrote:
> I've written an addendum to the 18-page 45-year > power MOSFET history article for the x-Chapters.
<snip>
> ** footnote: Of the parts on John Larkin's 2017 small pHEMT list > (with pinouts and SMT labels), only CEL's CE3514 is still > available, and Mouser has a pile of SKY65050 parts left in stock. > >
Did Skyworks discontinue it? Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Phil Hobbs wrote...
> >On 7/28/19 9:18 AM, Winfield Hill wrote: >> I've written an addendum to the 18-page 45-year >> power MOSFET history article for the x-Chapters. ><snip> >> ** footnote: Of the parts on John Larkin's 2017 small pHEMT list >> (with pinouts and SMT labels), only CEL's CE3514 is still >> available, and Mouser has a pile of SKY65050 parts left in stock. > > Did Skyworks discontinue it?
Hard to say. The product page doesn't say so, but they only list RichardsonRFPD and themselves as sources. For themselves, they say zero inventory. It doesn't look good. -- Thanks, - Win
On 28.07.19 2:18 PM, Winfield Hill wrote:
> [&acirc;&euro;&brvbar;] CEL's CE3514 is still available
On a related note, does anyone here have 1/f noise measurements for the CE3512K2 or CE3514M4? &acirc;&euro;&rdquo; David
On 28.07.19 2:18 PM, Winfield Hill wrote:
> Now we are left with parts like the > SAV-551+, made by Mini-Circuits (thank you!) and not even > appearing on Octopart This part substitutes for Avago's > ATF-55143, and features 2 ohms Ron and 0.4pF Cout, numbers we > were getting used to in the good-old-days. > > ** footnote: Of the parts on John Larkin's 2017 small pHEMT list > (with pinouts and SMT labels), only CEL's CE3514 is still > available, and Mouser has a pile of SKY65050 parts left in stock.
Qorvo appear to sell some discretes as well [1], but unfortunately they seem to only be available in die form. Probably not worth a mention because of that, but it might be an option if one absolutely needed the smallest input capacitance possible. &acirc;&euro;&rdquo; David [1] https://www.qorvo.com/products/discrete-transistors/gaas-phemts
On Mon, 29 Jul 2019 15:44:51 +0100, David Nadlinger
<david@klickverbot.at> wrote:

>On 28.07.19 2:18 PM, Winfield Hill wrote: >> Now we are left with parts like the >> SAV-551+, made by Mini-Circuits (thank you!) and not even >> appearing on Octopart This part substitutes for Avago's >> ATF-55143, and features 2 ohms Ron and 0.4pF Cout, numbers we >> were getting used to in the good-old-days. >> >> ** footnote: Of the parts on John Larkin's 2017 small pHEMT list >> (with pinouts and SMT labels), only CEL's CE3514 is still >> available, and Mouser has a pile of SKY65050 parts left in stock. > >Qorvo appear to sell some discretes as well [1], but unfortunately they >seem to only be available in die form. Probably not worth a mention >because of that, but it might be an option if one absolutely needed the >smallest input capacitance possible. > > &mdash; David > > >[1] https://www.qorvo.com/products/discrete-transistors/gaas-phemts
We went through an extended NDA process with Qorvo before we could see data sheets for some unremarkable laser drivers. And then the prices were 4x what we considered reasonable. I suspect they only want to sell parts by the billion. -- John Larkin Highland Technology, Inc lunatic fringe electronics