Electronics > Repair
Has anyone replaced HP8591(E) SRAM by FRAM?
Greybeard:
OK, that sounds “a little” more difficult than I had hoped… :-\
Miti:
--- Quote from: Greybeard on December 15, 2024, 12:33:33 am ---OK, that sounds “a little” more difficult than I had hoped… :-\
--- End quote ---
Looking at Motorola 68000, looks like it needs a minimum of 4 clock cycles for a write so I think we are safe.
If my calculations are correct, the write cycle time is about 271nS. Same for reading.
squadchannel:
WE,OE? will probably conflict. if they don't conflict, could use a 16Bit FM22L16, but have to build a board that straddles the two ROMs. not my preference. :scared:
also, yeah, it slow.
my choice the 90ns FM28V100, but at $40(each $10). >:D
used to be able to get it for $10, but it's getting so expensive. jlc sell $10.
Miti:
Does anybody knows an IC that can delay a falling edge of a digital signal with minimum delay on the rising edge?
Thanks,
Miti
Miti:
I have a preliminary schematic. Can you please review and comment? What's missing is a supervisor.
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