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

[Ivan Shmakov]

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

 

[Joerg]

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

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 ...

 

[Ivan Shmakov]

[...]

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.)

[...]

Have you checked for availability and stock numbers lately? At least
in the US it looks dismal and that doesn't bode well.

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.)

Personally I do not use any Txx-type ICs because they are obsoleted
so quickly.

Huh? AIUI, TDA1524A is from 1987.

Probably because of key account strategies at the manufacturers.
Which is the wrong corporate strategy IMHO ...

Perhaps.

 

[Joerg]

Ivan Shmakov wrote:

[...]

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.)

[...]

Have you checked for availability and stock numbers lately? At least
in the US it looks dismal and that doesn't bode well.

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.

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.

(But also to note is that I'm interested in dozens of parts at
most, not something like 10 000 or more.)

For Hobby it should be ok.

Huh? AIUI, TDA1524A is from 1987.

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.

Perhaps.

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.

 

[Ivan Shmakov]

On Mon, 11 Mar 2013 15:49:52 +0000, Ivan Shmakov wrote:
I'm curious, are there any IC's similar to TDA1524A [1] (stereo
analog volume and tone control)?

[...]

I'm more interested in suppliers from Hong Kong or China, and they
seem to still sell it.

Take a look here under Products->Multimedia Audio IC.

http://www.princeton.com.tw

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.