<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">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:<div class=""><br class=""></div><div class=""><a href="http://synth-diy.org/pipermail/marketplace/2021-May/000047.html" class="">http://synth-diy.org/pipermail/marketplace/2021-May/000047.html</a></div><div class="">and</div><div class=""><a href="http://synth-diy.org/pipermail/marketplace/2021-May/000048.html" class="">http://synth-diy.org/pipermail/marketplace/2021-May/000048.html</a></div><div class=""><br class=""></div><div class="">Ben</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 19 May 2021, at 14:06, <a href="mailto:mskala@ansuz.sooke.bc.ca" class="">mskala@ansuz.sooke.bc.ca</a> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">It seems Texas Instruments is discontinuing the LM13700N - that is the DIP<br class="">version of the part. Mouser lists it as "End of Life" and links to this<br class="">discontinuation notice dated May 12, 2021, with the last order date May<br class="">12, 2022:<br class=""> <a href="https://www.mouser.com/PCN/Texas_Instruments_PCN20210505000_2021051212340278.pdf" class="">https://www.mouser.com/PCN/Texas_Instruments_PCN20210505000_2021051212340278.pdf</a><br class=""><br class="">I haven't been able to find this notice on the TI Web site, which still<br class="">shows the product's status as "active," including the DIP version.<br class=""><br class="">CoolAudio makes a 13700 clone and their data sheet describes both DIP and<br class="">SOIC versions, but the DIP seems to be a unicorn. CoolAudio doesn't sell<br class="">it on their Web site, neither do any distributors, and a Web search for<br class="">the purported part number of V13700D only turns up the data sheet. I<br class="">don't believe it really exists in any way accessible to hobbyists. Maybe<br class="">they'd make it for you if you ordered a million units.<br class=""><br class="">A Chinese manufacturer called "XinLuDa" offers a DIP dual operational<br class="">transconductance amplifier called the XD13700, available through LCSC,<br class="">which seems to be a clone; I don't know how faithful it is or isn't. They<br class="">do note in their data sheet that there are differences in the buffer units<br class="">between the XD13700 and XL13700 (which is their own surface-mount version<br class="">of a similar part). Interestingly, they claim that the DIP version is<br class="">better - in which case why make them different at all?<br class=""><br class="">Alfa offers a 3280 clone (data sheet says both DIP and SOIC, but the Web<br class="">site only lists the SOIC); and something called the AS13704, which is a<br class="">13700-like OTA in a quad instead of dual configuration, and only in SOIC.<br class="">Neither can directly replace a DIP 13700.<br class=""><br class="">I think the 13700 may be a bellwether for through-hole packages in<br class="">general. As basically the last OTA to be available in a through-hole<br class="">version from a major manufacturer, it has a big share of the market for<br class="">through-hole analog electronics. If it makes sense to discontinue this<br class="">product, that means the market in question is now too small to be worth<br class="">serving anymore, and that assessment will be applied to other products<br class="">too. Memento mori.<br class=""><br class="">-- <br class="">Matthew Skala<br class=""><a href="mailto:mskala@ansuz.sooke.bc.ca" class="">mskala@ansuz.sooke.bc.ca</a> People before tribes.<br class=""><a href="https://ansuz.sooke.bc.ca/" class="">https://ansuz.sooke.bc.ca/</a><br class="">_______________________________________________<br class="">Synth-diy mailing list<br class="">Synth-diy@synth-diy.org<br class="">http://synth-diy.org/mailman/listinfo/synth-diy<br class="">Selling or trading? Use marketplace@synth-diy.org<br class=""></div></div></blockquote></div><br class=""></div></body></html>