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What is happening with Maxim?

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Cervisia:

--- Quote from: E-Design on September 22, 2021, 07:51:53 pm ---
--- Quote from: SilverSolder on September 22, 2021, 05:51:42 pm ---Are we going back to designing things with reliably available discrete components instead of modern ICs?
--- End quote ---

Sure as long as it doesn't include a JFET...
--- End quote ---

So what about a discrete JFET as an IC?
https://www.ti.com/product/JFE150

E-Design:

--- Quote from: Cervisia on September 26, 2021, 03:43:33 pm ---
--- Quote from: E-Design on September 22, 2021, 07:51:53 pm ---
--- Quote from: SilverSolder on September 22, 2021, 05:51:42 pm ---Are we going back to designing things with reliably available discrete components instead of modern ICs?
--- End quote ---

Sure as long as it doesn't include a JFET...
--- End quote ---

So what about a discrete JFET as an IC?
https://www.ti.com/product/JFE150

--- End quote ---

Well.. no problem.. its fine to use.


Until it isnt.

peter-h:
I am looking at replacing the MAX3089 with the ISL3173 (question mark re 5V VCC operation) and with the SN65HVD55DR (costs even more than the MAX3089!) - thanks for the tip earlier.

The ISL has a gotcha in that it draws way more current on the TXE pin, so a 10k pullup is no good. Somebody else on the internet had got burnt with that... It actually takes a very careful examination of the various chip functions to work out a circuit into which any of these can be simply dropped.

But neither is available from distribution. Only the overpriced outlets like Mouser have stock, at about 3x the distribution price I've been quoted today. That's a similar price to the cowboy sellers in the US.

It's gonna be interesting how far this situation collapses, when it does.

SilverSolder:

--- Quote from: peter-h on October 06, 2021, 03:36:43 pm ---I am looking at replacing the MAX3089 with the ISL3173 (question mark re 5V VCC operation) and with the SN65HVD55DR (costs even more than the MAX3089!) - thanks for the tip earlier.

The ISL has a gotcha in that it draws way more current on the TXE pin, so a 10k pullup is no good. Somebody else on the internet had got burnt with that... It actually takes a very careful examination of the various chip functions to work out a circuit into which any of these can be simply dropped.

But neither is available from distribution. Only the overpriced outlets like Mouser have stock, at about 3x the distribution price I've been quoted today. That's a similar price to the cowboy sellers in the US.

It's gonna be interesting how far this situation collapses, when it does.

--- End quote ---

When you begin designing UARTs around vacuum tubes, you know the situation has collapsed!  :D

peter-h:
Replacing Maxim parts with TI parts is quite a fun exercise. I've spent the last few days on it :) Once the bigger customers wisen up to this, Maxim will lose big chunks of their sales, totally, and will never get them back.

Renesas won't comment on the ISL3173 at 5V. They say it is below the absolute max (7V) but aren't saying it will function. Quite strange.

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