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TDA1524A, or? (stereo analog volume and tone control)

Discussion in 'Electronic Design' started by Ivan Shmakov, Mar 11, 2013.

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  1. Ivan Shmakov

    Ivan Shmakov Guest

    I'm curious, are there any IC's similar to TDA1524A [1] (stereo
    analog volume and tone control)?

    A Web search has revealed TDA1526 [2] and BA3853BFS [3]. The
    application circuit for the first has, at the first glance, a
    few more passive parts (than the one for TDA1524A) for the
    filters. The one for BA3853BFS has seven (!) 10 uF capacitors.
    Are there particular advantages (or disadvantages) that I may be
    missing?

    I'm somewhat concerned over that TDA1524A may no longer be
    manufactured. (Though, as it seems, it's still more widely
    available than either TDA1526 or BA3853BFS.)

    TIA.

    [1] http://www.datasheetcatalog.org/datasheet/philips/TDA1524.pdf
    [2] http://classiccmp.org/rtellason/chipdata/tda1526.pdf
    [3] http://www.datasheetcatalog.org/datasheets/208/233451_DS.pdf
     
  2. Joerg

    Joerg Guest

    Have you checked for availability and stock numbers lately? At least in
    the US it looks dismal and that doesn't bode well. Personally I do not
    use any Txx-type ICs because they are obsoleted so quickly. Probably
    because of key account strategies at the manufacturers. Which is the
    wrong corporate strategy IMHO ...
     
  3. Ivan Shmakov

    Ivan Shmakov Guest

    Well, given that I'm located in what's typically thought of as
    "Asia," I'm more interested in suppliers from Hong Kong or
    China, and they seem to still sell it.

    (But also to note is that I'm interested in dozens of parts at
    most, not something like 10 000 or more.)
    Huh? AIUI, TDA1524A is from 1987.
    Perhaps.
     
  4. Joerg

    Joerg Guest

    Sure, but if something becomes unobtanium in the US that usually means
    it's only a matter of time until it's gone worldwide. Also, be careful
    with some Asian sources, that you don't get rebranded merchandise that
    "fell off the truck somewhere" a few years ago.

    For Hobby it should be ok.

    With Txx-chips that means nothing. Many don't even survive a few years
    in the market because they were probably made for one particular TV set
    or something like that. Then when the production of this set stops ... poof.

    My advice is not to buy stuff from the scalpers. If you end up getting
    QC rejects or even fake die you might waste a lot of your time finding
    out what's wrong, even though nothing is wrong with the rest of your
    circuit.
     
  5. Ivan Shmakov

    Ivan Shmakov Guest

    ACK, thanks.

    Unfortunately, I don't seem to see any IC there that would
    feature /analog/ control. I understand that there are certain
    advantages in controlling such an IC digitally (and, indeed, I'm
    interested in trying it out, at some later date), but I'd also
    note that it easily doubles both the complexity and the cost of
    the resulting circuit, which may be undesirable at times.
     
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