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Thanks again for the info. I still don't know what to make of all this. On the Digikey site if I look up anything at all in the 89c, 89cv, 89lv, or 89v series in any package (DIP,PLCC etc) it states either "obsolete" or   "Limited quantity available, not recommended for new design."

I have not looked up the LPC's

Tony

Thanks for pointing me to that page. I don't know what I'm doing wrong on their website, but if I follow the navigation of products - microcontrollers - 8/16 bit legacy - flash I come up with nothing. Likewise if I do a search for "89v51" I get the following result:

Search results for '89V51'
2 total results, page 1 of 1
Title   Description   Content type
P89V/LV51RD2 Boot Loader update V5   P89V/LV51RD2 Boot Loader update V5   Application note
TN00001   Migrating from the P89V51Rx2 to P89CV51Rx2

Maybe there is a problem with my browser but I was informed by my supplier (digikey) via email notification that the 89v51rXX is obsolete: This link states limited quantity available, not reccomended for new design:

http://search.digikey.com/us/en/products/P89V51RB2FN,112/568-3229-5-ND/1023713

Seem the entire line has disappeared from the NXP website and Digikey reports the 89v51 series as obsolete. I've got about 15 boards designed around these.

Tony