[sdiy] DIP LM13700 discontinuation

[Ben Stuyts]

Our list member Taku has just posted his monthly for sale message for TEMPCO’s and other thru-hole devices. It also includes LM13700’s now. See:

http://synth-diy.org/pipermail/marketplace/2021-May/000047.html <http://synth-diy.org/pipermail/marketplace/2021-May/000047.html>
and
http://synth-diy.org/pipermail/marketplace/2021-May/000048.html <http://synth-diy.org/pipermail/marketplace/2021-May/000048.html>

Ben


> On 19 May 2021, at 14:06, mskala at ansuz.sooke.bc.ca wrote:
> 
> It seems Texas Instruments is discontinuing the LM13700N - that is the DIP
> version of the part.  Mouser lists it as "End of Life" and links to this
> discontinuation notice dated May 12, 2021, with the last order date May
> 12, 2022:
>   https://www.mouser.com/PCN/Texas_Instruments_PCN20210505000_2021051212340278.pdf
> 
> I haven't been able to find this notice on the TI Web site, which still
> shows the product's status as "active," including the DIP version.
> 
> CoolAudio makes a 13700 clone and their data sheet describes both DIP and
> SOIC versions, but the DIP seems to be a unicorn.  CoolAudio doesn't sell
> it on their Web site, neither do any distributors, and a Web search for
> the purported part number of V13700D only turns up the data sheet.  I
> don't believe it really exists in any way accessible to hobbyists.  Maybe
> they'd make it for you if you ordered a million units.
> 
> A Chinese manufacturer called "XinLuDa" offers a DIP dual operational
> transconductance amplifier called the XD13700, available through LCSC,
> which seems to be a clone; I don't know how faithful it is or isn't.  They
> do note in their data sheet that there are differences in the buffer units
> between the XD13700 and XL13700 (which is their own surface-mount version
> of a similar part).  Interestingly, they claim that the DIP version is
> better - in which case why make them different at all?
> 
> Alfa offers a 3280 clone (data sheet says both DIP and SOIC, but the Web
> site only lists the SOIC); and something called the AS13704, which is a
> 13700-like OTA in a quad instead of dual configuration, and only in SOIC.
> Neither can directly replace a DIP 13700.
> 
> I think the 13700 may be a bellwether for through-hole packages in
> general.  As basically the last OTA to be available in a through-hole
> version from a major manufacturer, it has a big share of the market for
> through-hole analog electronics.  If it makes sense to discontinue this
> product, that means the market in question is now too small to be worth
> serving anymore, and that assessment will be applied to other products
> too.  Memento mori.
> 
> -- 
> Matthew Skala
> mskala at ansuz.sooke.bc.ca                 People before tribes.
> https://ansuz.sooke.bc.ca/
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