Connect with us

Fast but small optocouplers?

Discussion in 'Electronic Design' started by Joerg, Sep 1, 2012.

Scroll to continue with content
  1. Joerg

    Joerg Guest

    The one with VDE papers is around a cent or so more but in some apps you
    need those papers on file. BT.

    TOF was probably a typo and they haven't cleaned it out at Digikey.
  2. Joerg

    Joerg Guest

    Sure, anything, the protocol doesn't matter. Physical circuit size does
  3. Joerg

    Joerg Guest

  4. Tim Williams

    Tim Williams Guest

    Doncha hate it more when it covers them, but it's wrong? We found that on
    a Schaffner line filter. Datasheet listed options for termination (lugs,
    posts, etc.), so we bought the different style, doesn't fit -- mounting
    holes in the wrong place. No drawing exists of this footprint variant.
    Go figure.

  5. Tim Williams

    Tim Williams Guest

    Or just DC, without the PWM?

    Those dual photodiode couplers are pretty accurate, but they generally
    need to be trimmed on assembly to get the gain right.

  6. Ohh, that's almost local to Buf., NY. I like their "trois pistoles".
    Belgain style abbey ale...

    George H.
  7. Tim Williams

    Tim Williams Guest

    Or you could buy a Hakko multi station ;-)

    $$$, but few ameteurs have more than three hands to use at a time, not
    sure what else you'd be using all them for!

  8. Guest

    I have two Metcals at the station I share, each with two iron (two irons,
    tweezers, and a sucker). Each of the two Metcals has two ports, unfortunately
    only one is active at a time. I'm always waiting for an iron to heat. I
    should get another controller (I don't use the sucker much).
  9. Fred Abse

    Fred Abse Guest

    Belgium *is* the end of the world ;-)
  10. Joerg

    Joerg Guest

    But it's brewed in Canada :)
  11. spamtrap1888

    spamtrap1888 Guest

    You have to go to Russian River Bwg in Santa Rosa and taste their
    Belgian-style wild fermented beers. They are spot-on and delicious.
  12. Joerg

    Joerg Guest

    Don't say that when Phil is listening ...

    But seriously, Fin du Monde is very good stuff. Has nine volts, so one
    should not have to drive afterwards.
  13. Nico Coesel

    Nico Coesel Guest

  14. Joerg

    Joerg Guest

  15. Nico Coesel

    Nico Coesel Guest

    If you look at Toshiba's website you'll see they have even smaller
    ones but the specs for those say nothing about speed. Only that they
    can be used for driving MOSTFETs.
  16. Fred Abse

    Fred Abse Guest

    I've always liked Tosh optos.


    Rise & fall time typ. 15ns @ Vf 0-14mA

    3.7 x 4.5mm

    It's an "IC output" type, needing Vcc of 2.7 to 5.5V on the output side, so you
    mighn't like it.
  17. Joerg

    Joerg Guest

    Do you know how they are WRT longterm availability? Production time
    frames more like two or three decade. With HP ... Avago that was never a
    problem but they don't have anything suitable for this app.

    It's a good device, inverts which is nice, but I only have around 10V
    and no space. I could also siphon off 1.5V or so somewhere on the RX
    side but it won't run with that. They also recommend to give it north of
    4.5mA on the LED which really is a bit much.
  18. Fred Abse

    Fred Abse Guest

    I've been using TLP550s for north of 20 years. They still make those.

    I notice that there's an EOL notice on TLP621, but their suggested "almost
    equivalent will do what I want.

    IME, the reliability of Tosh optos is better than their HP/Agilent
  19. Joerg

    Joerg Guest

    That's good to know, Fred, thanks. I guess I'll use a Toshiba opto then.
  20. rickman

    rickman Guest

    As long as you've opened the data sheet gripe door, the other day I was
    looking for LCD capable MCUs and Freescale has a line of nice ones.
    Trouble is they put out a data book for each *package* variant! The LCD
    controller has access to fewer or more pins depending on the package.
    Ok, so I have to look in three data books to find which one will meet my
    needs... everywhere I find a reference to the number of LCD pins
    supported, the footnote refers me to the pin out section. In the pinout
    section they refer me to... the pinout section! I guess the info is in
    the pin list if I want to track down and count some 40+ signals in the
    multiplexed IO lists.

    I write to Freescale support and they seem to have moved to the other
    half of the world. Every reply takes a full day, often sent in the wee
    hours of the morning and clearly shows they don't understand my
    question. After four attempts to get them to find me the info of LCD
    pins vs. package I get the counts I asked for. Finally I got them to
    understand they might want to add this to the data sheets rather than
    expect the user to wade through the pinout lists.

    Does it really save Freescale money to move support to a third world
    country if they spend four times as much effort answering a question? I
    won't even try to understand why they publish a separate data book for
    every package of a part.

Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day