[sdiy] DIP LM13700 discontinuation

[Ian Fritz]

Thanks! Last I looked I didn’t find anything, but now I see a number available. 

Ian

> On May 19, 2021, at 12:12 PM, Jean-Pierre Desrochers <jpdesroc at oricom.ca> wrote:
> 
> 
>> 
>> Yabbit — what if you need to test a dozen or so to select for performance, eg low offset and variation?  There should be ZIF sockets for these!
> 
> When I bought this universal programmer it came with a HUGE
> set of ZIF to DIP adapters (37 overall) ..
> These adapters are very handy !!!
> 
> https://www.aliexpress.com/item/1005001658254400.html?albpd=en1005001658254400&acnt=708-803-3821&aff_platform=aaf&albpg=743612850714&netw=u&albcp=7386552844&pvid=b2cd7219-b6d0-4b96-a7f9-82e1187346a0&sk=UneMJZVf&scm=1007.23534.123999.0&trgt=743612850714&terminal_id=aa2eef87115d46deb59b6c12f0a2191d&needSmbHouyi=false&albbt=Google_7_shopping&src=google&crea=en1005001658254400&aff_fcid=b31090308e9e42e89a0eab5643cfbe0c-1621447734146-07413-UneMJZVf&gclid=Cj0KCQjw7pKFBhDUARIsAFUoMDb1zQrq1a8JCGRifm3sl5RnDJ_jPuCPCnUFOtlVuSXYnJDk983qNsoaAmm8EALw_wcB&albag=80241711349&aff_fsk=UneMJZVf&albch=shopping&albagn=888888&isSmbAutoCall=false&aff_trace_key=b31090308e9e42e89a0eab5643cfbe0c-1621447734146-07413-UneMJZVf&rmsg=do_not_replacement&device=c&gclsrc=aw.ds
> 
> ***********************************************
> 
> -----Message d'origine-----
> De : Synth-diy [mailto:synth-diy-bounces at synth-diy.org] De la part de Ian Fritz via Synth-diy
> Envoyé : 19 mai 2021 14:05
> À : chris
> Cc : synth-diy at synth-diy.org
> Objet : Re: [sdiy] DIP LM13700 discontinuation
> 
> Yabbit — what if you need to test a dozen or so to select for performance, eg low offset and variation?  There should be ZIF sockets for these!
> 
> Ian
> 
>> On May 19, 2021, at 7:44 AM, chris <chris at chrismusic.de> wrote:
>> 
>> Hmm, I don't understand why people are dogmatically sticking to DIP.
>> 
>> Soldering SO is a piece of cake. Even my 60+ years old eyes and 
>> fingers have no problems with SO. It's not as if it were 0.4mm pitch or BGA.
>> 
>> Or is it the old wives' tale that the holes make it sound better? 
>> Like f holes on a violin...?
>> 
>> Chris
>> 
>> 
>> 
>>>> On Wed, 19 May 2021 08:06:59 -0400 (EDT) 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_202105121
>>> 2340278.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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>> 
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