DS12887 pcb substitute with battery

alan at alanlee.org alan at alanlee.org
Tue Nov 21 20:54:24 CST 2017

What are you talking about?



On 2017-11-21 14:16, Maciej W. Rozycki via cctech wrote:
> On Mon, 13 Nov 2017, systems_glitch wrote:
>> Good stuff! I recently designed a module to build new DS1287 and 
>> DS12887
>> modules from the bare DS1285 and DS12885 ICs:
>> https://imgur.com/a/cgKm5
>  Nice!
>  That wouldn't solve my problem though, given the apparent 
> unavailability
> of DS1285 chips (in any packaging, whether surplus or used), compared 
> with
> the ubiquity of used DS1287 and DS1287A ones, possibly because they 
> were
> often socketed.  Using my systems as a reference for the Linux port I 
> want
> to avoid any deviation from their original specification so that 
> software
> does not make use of it by chance.
>  As to the DS12887 and DS12887A chips -- these are still manufactured 
> and
> readily available, as someone mentioned a while ago, although a bit 
> highly
> priced, so either reworking an old one or using your alternative does 
> help
> cutting cost, which may especially matter if you need more than just a
> few.
>   Maciej

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