27C512 vs 27C256

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Jan 14, 2007 | 02:45 PM

va454ss

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27C512 vs 27C256

Are these interchangable?

Jan 14, 2007 | 06:47 PM

Grim Reaper

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Not directly.

Jan 15, 2007 | 11:51 PM

HaulnA$$

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From: Dallas

A 27C512 will work in place of a 27C256 bit not vice versa. To make the 27C512 replace a 27C256, you must either stack the 32file into the chip twice or burn the file into the upper 32k of the 64k 27C512. This page on Ludis' site has the pinouts of both PROMs. Seeing them may help to clear it up. http://www.cruzers.com/~ludis/p4pinouts.html . HTH