LF357 substitude

[chafik]

Not all part from China are fake you should choose the right supplier (store) it should be a thread about good store from Ali express and ebay for sharing bad or good experience for my self I bought most of part from Arrow and digikey or sometimes when there's free shipping at Texas instruments or microchip web site the bad experience I got is when I bought resistance from ebay with 1% error and I got trash more then 10% hopefully I tested them before I soldered them it was 4000 resistances kit ,arrow when you order multiple part you could receive the number of packages equal to number of part you order the price is too expensive then Ali express for stm32f microcontroller there is also a scam website that I was thinking to order stm32f405 for 3 $ but when I put the link of website It was mentioned as scam I will put the link in my second post

[chafik]

https://www.component-hk.com is the website for the fraud I think they have more then this website they ask you to pay with wire transfer after you pay you can't get refund

[kt315]

What is the real problem now?

There are at least one dealer here in Germany where almost every old semiconductor can be found

i told many times MAIN suplier in EU is Elfa Distrelec. Sweden.

[Andi68]

i told many times MAIN suplier in EU is Elfa Distrelec. Sweden.

However, it is easier for me to order where I live.

But somehow I also get rare parts organized, no problem.

And I'm so interested that I like to deal with things

[kt315]

received LF356 from Greece (TDB0156DP)

[RS_Phil]

"I can not buy from eBay directly, because it is an American company and my country is under sanction." what country because despite what others may tell you i have not had any fakes from ebay as long as went with premium seller in uk (have to be careful as lots are drop shippers now and that is where you get fakes) and pay a realistic price not just the cheapest we have a saying here " you pay peanuts, you get monkeys..." sorry you are under sanction but if you can get ad797 it will work adeqautely and there are few fakes of this chip as there would be no point as at 450mhz bw it will be apparent in short order if its a duffer the noise levels would be ridiculous.

LF357 is no direct pin to pin replacement which is good as 357 other than LF356 but no good as 357, what I do is I used NE5534 with a little modification which give best result to 357 or better.

[qute1]

Very interesting ne5534 has no where near the performance characteristics of lf357 slew rate and noise are far worse how did you modify them?

LF357 is no direct pin to pin replacement which is good as 357 other than LF356 but no good as 357, what I do is I used NE5534 with a little modification which give best result to 357 or better.

[RS_Phil]

I've done this to some Pi Md's but not in all pi..

[chuubaba]

Is this a substitute for LF357.
Someone post datasheet of this part whatever it is.

[Andi68]

https://datasheetspdf.com/pdf/616245/ETC/UPC157/1

[chuubaba]

https://datasheetspdf.com/pdf/616245/ETC/UPC157/1

I have visited the link but does not make sense to me as it is not in English.
Can you confirm that it is a good substitute of LF357?

[Andi68]

Try it

[chuubaba]

It is working. Will experiment more to see how good this performs.

Try it

[kt315]

i am looking aliexpress... situation is crisis. if before covid i could read customers reviews and do a choice so
after covid, now, all listings had refreshed, zeroed, there are just 1...2...3 reviews in some.

[kt315]

just an example. what we see here in reviews... guy in UA tested in felezio. i see his resume in original, in russian.
poor result. second guy wrote the chip is remarked.