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Finding equivalents for old vintage chips?
Posted: 13 Oct 2020 19:55
by Steve
Hey guys,
I'm trying to find equivs for the following:
The IS900 Optocoupler (written on chip: IS900 I937DD)
https://www.findchips.com/detail/IS900/ ... quantity=1
and
HD74HC74P (With this one it seems there are many variants, but I am not sure how to tell if the variant is a suitable replacement. Any help appreciated thanks)
Re: Finding equivalents for old vintage chips?
Posted: 13 Oct 2020 20:00
by exxos
Isn't the second one just 74HC74 LOGIC CHIP?
Re: Finding equivalents for old vintage chips?
Posted: 13 Oct 2020 20:01
by Steve
@exxos, yes but there seem to be a few variants and my knowledge in this area is small, so I'm hoping someone can clarify for me.
Re: Finding equivalents for old vintage chips?
Posted: 13 Oct 2020 20:03
by exxos
Steve wrote: 13 Oct 2020 20:01
@exxos, yes but there seem to be a few variants and my knowledge in this area is small, so I'm hoping someone can clarify for me.
SN74HC74N. ?
Re: Finding equivalents for old vintage chips?
Posted: 13 Oct 2020 20:06
by Steve
Cheers :)
Any thoughts on the weird old optocoupler? @exxos
Re: Finding equivalents for old vintage chips?
Posted: 14 Oct 2020 20:40
by Kai Robinson
For the IS900 - replace with this:
https://uk.rs-online.com/web/p/optocoupler-ics/1718172/
direct pin compatible part, from the same manufacturer.
Re: Finding equivalents for old vintage chips?
Posted: 14 Oct 2020 21:02
by Steve
Cheers @Kai Robinson !