[sdiy] Hardware gurus.. I need your opinion here..

[Jason Tribbeck]

Hi,

As before, FRAM could be a good replacement. Cypress FM1808B-SG or
FM18W08B-SG. Although as mentioned in the other thread, there may be
incompatibilities in timings, so best to check.

The main difference could be if the TDS350 uses the partitioning feature of
the DS1630AB (I'd not heard of that before). However, you'd have this
problem if you went down the hybrid route anyway. If the partitioning
feature is used, then basically your second option is going to be the best.

I would echo the important thing to do is copy the existing data off it
first of all, and then figure out what to do with it.

On Fri, 30 Apr 2021 at 21:12, Jean-Pierre Desrochers <jpdesroc at oricom.ca>
wrote:

> I have a full functional old 90's Tektronix TDS350 that I use a lot.
>
> I love this Faithfull scope but its Dallas non-volatile Ram DS1630AB-120
> has a datecode 9430 (1994, 30th week !)
>
> BUT it still keeps its calibration and data memory settings !!
>
> Imagine.. more than 25 years after !
>
> Well because I don't want to push my luck too far here
> I decided to replace this Dallas RAM for something more reliable
> for the next years to come..
>
>
>
> *2 choices:*
>
>
>
> Replace it with a small 28DIP600 pcb hybrid filled with
> a non-volatile RAM controller IC + a 32k x 8 SRAM
> using an external connected 3V lithium battery.
>
>
>
> *OR*
>
>
>
> Buy a genuine Tektronix Dalals DS1630AB-120 like these ones for sale at
> $14.99US each.
>
> https://www.qservice.tv/vpasp/shopexd.asp?id=12458&bc=no
>
>
> The seller quotes:
>
> ".. the date codes are 9510 or -1995, 10th week"
>
> ".. all these are genuine parts bought from the tektronix surplus store in
> Beaverton, "
>
>
>
> Here I was aware of the inner battery life span left from the
> manufacturer's datecode.
> But the actual DS1630AB specs page 10  says:
>
>
>
> *9 - Each DS1630 has a built-in switch that disconnects the lithium source
> until Vcc is first applied by the user.The expected Tdr is defined as
> accumulative time in the absence of Vcc starting from the time poweris
> first applied by the user.*
>
>
>
> Sure these could have been connected at least once then the battery
> countdown started OR these have never been used..
>
>
>
> What do you think ?
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org
>


-- 
Confucius says: Man with problem who thinks solution is regular expression
now has two problems.

*/s/two/many/*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20210501/37bc9234/attachment.htm>