diy NVRAM

EPROM EEPROM SRAM NVRAM Flash chips, reading/writing hardware and software
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Re: diy NVRAM

Postby The1 » Sun Oct 09, 2011 2:52 pm

thanks Festy, good comments!

Previously ive only heard that either No Bin Logo or 100ns part (70ns is all that is sold according to datasheets) indicate a fake. Your comments defiantly make sense! That was one thing i thought once i saw the CR battery, dont know how that's ment to last 10yrs!! :o

EDIT: the one in the photo i bought 6 months ago, it lasted only 6months obviously, the battery is flat only reads about 200mv. It would write then verify then after a few seconds would be corrupt again.

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Re: diy NVRAM

Postby festy » Sun Oct 09, 2011 3:02 pm

Other signs are that the cover shouldn't just pop off, and I don't think the dimple above pin 1 should be there.

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Re: diy NVRAM

Postby The1 » Sun Oct 09, 2011 3:55 pm

well im looking forward to yours fest! Maybe the only reliable ones!

a search on ebay for DS1245Y indicates 100% fake atm. Looking elsewhere to find some atm.

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Re: diy NVRAM

Postby VL400 » Sun Oct 09, 2011 4:29 pm

The ones I supply with boards are genuine, industrial rated and 70nS (there are other genuine speeds too) but sadly they come at a cost and have to buy them in quantity :cry: The DSfesty should be cheaper :thumbup:

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Re: diy NVRAM

Postby festy » Mon Oct 10, 2011 5:55 am

Another way to spot fakes - the dodgy serial number ;)
http://www.ebay.com.au/itm/1PCS-DS1245Y ... 4aaea2bc1d
date code 1010, but same serial as The1's.

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Re: diy NVRAM

Postby The1 » Mon Oct 10, 2011 8:25 am

and in that ones case it's $8 lol

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Re: diy NVRAM

Postby The1 » Fri Oct 14, 2011 8:51 am

just for the record i got an email back from maxim and there official disty to the public is mouser.

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Re: diy NVRAM

Postby festy » Fri Oct 14, 2011 8:39 pm

festy wrote:I should have a couple of modules ready for testing in a few weeks for the 808 and vs+ ecus, just waiting for the pcbs and parts to arive now.

Bit of a delay with some parts being out of stock.
I'll have a couple ready for testing in 3 weeks, more if the back ordered parts turn up by then.

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Re: diy NVRAM

Postby festy » Thu Nov 17, 2011 10:10 pm

The boards arrived today - just need to pick up some shorter pcb pins because the machine pins I was going to use make it too tall to fit in the 808's case without mods. My 'test bench' ecu is running off this module now.
nvram.jpg
nvram.jpg (29.13 KiB) Viewed 4451 times

nvram2.jpg
nvram2.jpg (29 KiB) Viewed 4451 times

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Re: diy NVRAM

Postby kojab » Fri Nov 18, 2011 6:54 am

That looks good. Any idea of cost yet?

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