[sdiy] [OT] LM13700 spotted in commercial product of big Manufacturer

[Gordonjcp]

On Mon, May 16, 2022 at 09:36:14AM -0700, David G Dixon via Synth-diy wrote:
> Through-hole TL072 is currently more or less unobtainable.  The main
> manufacturer, TI, is completely out of stock.  TI is really the only good
> place to buy TL072 (which, although half of a TL074 in functionality, tends
> to be significantly more expensive than TL074), since their price is a
> fraction of the price you typically find at the big retailers.  I use
> through-hole TL072 by the thousands, and it is admittedly a bit of a worry
> for me right now.  Through-hole TL074 are readily available and still very
> cheap.  Unfortunately, I use far fewer of those, as they are significantly
> less convenient from a layout perspective.

Maybe it would be worth respinning your board to take SOIC-8 TL072 as well as through-hole?  You'd maybe need to make a custom footprint and think carefully about how tracks cross underneath.

It's mental that Farnell are showing a lead time of May next year for their cheapest TL072CDT at £0.136 each for a reel of 2500!  You'd have to go for the TL072CDR for slightly more at £0.136 each per 1000.

If you want through-hole then you'd have to buy the much much more expensive TL072IP at £0.80 apiece, or £0.66 each per thousand.

For a fifth of the price it's probably worth thinking about going SMD...

-- 
Gordonjcp