hello,I am trying to find a compatible replacement for an obsolete hard to findpart SN75518NAfer much searching and reading and learning i thought maybe i could build acompatible circuit to perform same function as SN75518 ? I think i cancascade 2 of the MAX6971 to cover what is used on the 75518.could someone look at these and see if i am on track or lost ?if lost... can someone give me a landmark ?use 2 of theseto build this (-2 od the outputs)to drive a 16 alpha-numeric char VFD (16 segment)thanks for your time and help,rob

trying t build a replacement part for obsolete IC ?

Sep 15, 2007 22 Replies

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robb 18 years ago

Hi, Thanks for the offer to help jeff. Thats great ! but i just ordered the compatible replacements from digi-key. I will try to get that working first, partly for challenge/experience of fitting a 44-plcc into my 40-dip spot as well as making the repair. However, if the chip turns out to be not so compatible with my old circuit or i really muck things up then i might surely need to take you up on your offer.

thanks again for offer (and shenzen heads up) i really appreciate that, robb

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robb 18 years ago

find

Thanks GPE, I was unaware of such issues. i figured this day and age, for as long as IC have been around you could buy a chip fabrication unit at the local walleye world. thanks, rob

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Peter 18 years ago

Hi Rob, not that bad. we usually provide samples firstly and the do net 30 days payment terms with all end user.

Best regards Peter chen

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