We are redoing an 87C51FB design with the 87C51MC2, which is readilly available from DigiKey. The problem is, the -MC2 is an OTP part, and we have a lot of code development to do yet. This is going to kill off a lot of parts before the coding is finished. So, we identified a FLASH part for this, the AT89C51RE2SLSUM, a PLCC44 part, which should do the job nicely.
BUT, after a week of fruitless search, the -RE2 is proving nearly impossible to find. Even Atmel won't supply samples, they refer us to DigiKey. DKey doesn't have any, and they require a minimum order of hundreds, as does everyone else who doesn't have them in stock. We found one distributor who would sell us just two for a premium price, but they're stock is in Hong Kong, so charge $200 shipping! Another distributor will supply two or three, but they won't have any until mid-July!
So I come here in the hopes someone can either suggest a known source with stock in the US or who can sell us a couple out of their stock, right here, right now. We will pay a premium, of course, within reason.
Thanks for your attention, kenjj
erik
there is 'a million' uPsds and, if you can, for development go 3v3, the LPC952
Erik
There may be millions, I'd like to see what criteria you used for your search. If I drop PCA channels from the search I get gobs of choices. And out of those gobs, it's still the same four suitable candidates: the -MA2/MB2/MC2 and the -RE2. But I don't get to choose, my employer made these choices. I lobbied hard for the -952, everything we have on the product would be in the MCU, and it's $2.46 in qty/one!! But I got shot down, he wants a 87C51FB clone (preferably), with two UARTs and more mem space. The -MB2/MC2 fits the bill, and the -RE2 gives us FLASH.
So, my criteria are to start with a 87C51FB in PLCC44 packaging and add two UARTs. Thus: -87C51FB pinout -5V -PCA channels -two UARTs (or more) -FLASH 32K or more (for this go-round) If anyone has any suggestion(s) for suitable alternatives using these criteria, please let me know.
Otherwise, does anyone have two AT89C51RE2SLSUMs?
Thanks for the input so far. kenjj
Ceibo, Nohau, Lauterbach ... more
that will be a much better development environment anyhow.
sorry about suggesting chips without what you had not said you needed.
Thanks for the suggestions, so far, Erik.
I'm hardly the resident programming expert. I'm aware that there are virtual environments available to build code in. My employer, however, has 10s of 1000s of lines of well established code existant, and an established code-testing methodology he is comfortable with. More power to him, lots of pay checks will attest to his ability to produce sellable products. Not that he's hide bound, he has adapted new parts and methods before, but he knows what he wants and needs, and it will take something supplying an undeniable advantage to make him leave his comfort zone.
And the comfort zone is a great place to be. kenjj
it will take something supplying an undeniable advantage to make him leave his comfort zone he might not take my word for it, but an ICE is "an undeniable advantage" for development and there is no need to "leave his comfort zone" in order to buy an ICE. The end result is the same (you do not do final test with the ICE plugged in)