Processor/Chip info

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d_van
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Processor/Chip info

Post by d_van » Mon Feb 07, 2005 6:04 am

does anyone know where I can get a spec sheet for a M-80C31 Processor. Also 74HC245AP and M5L8255AP-5 chip. They are about 12 years old.
Thanks Dan Van
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Mike6158
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Re: Processor/Chip info

Post by Mike6158 » Mon Feb 07, 2005 6:21 am

These guys have a replacement that's supposed to be a drop in.<p>Maxim<p>Google is your friend... No M-80C31 but the other two are here:<p>All Data Sheet Search Engine
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philba
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Re: Processor/Chip info

Post by philba » Mon Feb 07, 2005 8:00 am

M-80C31 is, iirc, a variant on the old 8031 single chip micro from intel. I'd guess the the C means CMOS - the original was not CMOS (NMOS?). Not sure of the manufacturer. Look up 80c31. <p>I believe that the 31 was a precursor to the 8051 family that has been cloned by a lot of companies. I think atmel makes replacements. check their site.<p>8255 is a parallel port chip (dates from the original IBM PC) and you can still get replacements. I'd use cmos version.<p>the 245 is a standard 74HC245 bus transciever. still in production. any should work just fine.<p>Datasheets can be had for the googling. Yes, I agree, google is your friend.<p>What are you doing with them?<p>Phil<p>[ February 07, 2005: Message edited by: philba ]</p>

Engineer1138
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Re: Processor/Chip info

Post by Engineer1138 » Mon Feb 07, 2005 10:19 am

If you Google for "8031", "80C31" "8255 PIA", or "LS245" you'll find tons of data. I'm assuming this is to repair an existing device? I can't see why anyone would design a new product around an 8031 these days, but sometimes I guess it might make sense, esp. as a hobby project.<p>Among the basement clutter I need to get rid of is a handful of 8032s and a few dozen EPROMs & SRAMs. I think I have a Siemens/Philips databook for the 803x series. Want 'em? They're all yours (or anyone else who responds) for slightly more than the cost of shipping -- or free if you live in the TC, MN area.
HC245s are still useful to me so I'll hang on to those.

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