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One of our instruments currently uses M29W800DB70N6E (from Micron Technology Inc.) which is now Obsolete. We are planning to use MX29LV800CBTI-70G (from Macronix) [ datasheet ] as an alternate. Please confirm if any programming related updates are required if we switch to the new Alternate (MX29LV800CBTI-70G). Datasheet - incomplete specs

https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/29/MX29LV400%2C800%2C160C.pdf

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  • \$\begingroup\$ It would help others, and you, immensely if you provided links to data sheets. It also never hurts to make a brief comment on what the device actually does. This tends to improve engagement. \$\endgroup\$ Commented Feb 10 at 10:03
  • \$\begingroup\$ I've added data sheet links. You may have better ones. I looked for differences but the M29W... datasheet is not complete. One seemed to have a security register not mentioned on the ogther BUT that may have been a change of terminology. || Short of asking the new manufacturer or other users, it looks like needing a regoister by register comparison. \$\endgroup\$ Commented Feb 10 at 10:24
  • \$\begingroup\$ Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. \$\endgroup\$ Commented Feb 10 at 14:08

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The only true confirmation for the replacement part working in your instrument is to replace the obsolete part with a sample of the new Macronix part and perform ALL the required tests on your device with regards to the programming of the parts. If you can afford to do this to several of your devices, even better. Having said that, it is very usefull to contact the manufacturer first to enquire about recommended direct, drop-in replacement parts (in this case for the Micron part). If they don't have a remplacements they can recommend, then you need to ensure at the very least, AC & DC electrical compatibility before you proceed to do the dynamic testing in-circuit : writing, reading, sector erase, write-protection on/off, OTP programming (if there is one) etc. and all other that you use.

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