I just noticed that both Mouser and TI are listing a few models as discontinued. Notably, it looks like they’re getting rid of the PDIP model. Wondering if anyone has any more insight on this? I’m not really keyed into their product life cycles. Looks like they’re keeping the LM6172IMX/NOPB still as SOIC for now.
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There was some discussion of this on the LZX Discord back in September. One tip was to use Octopart to find vendors who have stock left over if you still want to look for the DIP package. Lars says that the AD8034 is a drop-in replacement. Apparently the AD828 could also work, but is more expensive.
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Good to know! Mouser still has DIP ones in stock, so PSA for anyone else that wants to stock up. At least SOIC is easy enough to solder to breakouts when we get there 
Straight up, I’m in the US and if anyone wanted to organize a group buy I’d definitely pick up 30 LM6172. Rochester Electronics has them for ~$3.50 but I also really don’t want to order 75 of them for $252.
I have one of every castle module that needs LM6172s installed- stole them for Syntonie builds. Really need to source opamps to finish all of these builds!
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Anyone have any thoughts on the AD4354 Quad OpAmp? Slew Rate is 100V/µS and BW of 100MHz. The supply voltage only goes up to 5.5V
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Ada4851 is a bit cheaper 
this is interesting - because we were looking into Lmh6643/4 as replacements for lm6172s on some cadets and was told that its slew rate (130V/μs) might be too slow for some functions (rectifiers or higher gains) - however ad8034 has slew of 80V/μs so if thats drop-in replacement then likely the lmh6643s will be ok too…
depends where you look - ada4851-4 is slightly cheaper than OPA4354 on mouser but the opa4354 is a bit cheaper/more available on lcsc &other chinese distributors
(plus it comes in soic package which is easier to hand solder than msop)
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We’ll have a bunch of LM6172 DIPs on our site soon. Just waiting for a large shipment of them to arrive.
www.networkxxiii.xyz
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Sigh. My source was in the process of shipping the chips and noticed corrosion on the pins. Apparently they weren’t stored correctly. These were non-ROHS parts, which are cheaper. So I had to swap for the lead-free ROHS-compliant versions. I still got a good price, but I won’t be able to sell them as cheaply as I had hoped. 
OK! A big 'ol bunch of DIP LM6172’s just hit my mailbox. I’ll have them up on networkxxiii.xyz in the new few days.
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I have 63 still in stock.
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Order placed, thanks!!!
If there is still demand for these, I have a lot of SOIC version which I can put on DIP adapter boards
I’ve sold out of the DIP version at networkxxiii.xyz and was contemplating designing a pre-made SOIC-to-DIP version to put on my site. A simple drop-in for folks who need the DIP version. I just don’t know if it would be cost effective.
they’re less than $4 apiece for the SOIC version on UTSOURCE right now whereas Mouser has the PDIP version for 11 apiece. 11 is insane, I payed 7 apiece a few months ago
They were $5.25 on networkxxiii.xyz but I recently sold out. I might be able to get some more from my Chinese source. (Don’t worry, their parts are legit…)
My vendor in China has the SOIC-8 very inexpensively and can get them to my board fab with no additional charge.
Would anyone be interested in a ~$5 ‘DIP-converted’ SOIC-8 LM6172?
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Pricing seems very fair, I’m sure there is demand for it given the continuation of DIY modules (I’ve added SOIC footprints on my designs to address the price hike)
If I have time tomorrow, I’ll draw a board real quick and send it to my fab to get a reliable idea of the total cost to make some of these. If not, early next week. Per usual, I’ll do everything I can to keep the ‘retail’ cost low.