[time-nuts] Dallas NV-SRAM replacement? (in 3458A)

Marco IK1ODO -2 ik1odo at spin-it.com
Tue Jun 8 16:44:06 UTC 2010

Speaking of the 3458A, it has three DS1235Y-150 non volatile SRAM on 
the CPU board. Each is a 32K x 8 bit, so there is a lot of info inside.
As the useful life of those is in the order of 10 years and most 
3458A a re now 10 to 20 year old, is there a possible replacement? 
Possibly with a more modern component?
Also, of course it would be a good idea to read and save the contents 
of the SRAMs before replacing, but... is any custom data in them that 
cannot be rewritten with a complete recalibration?
Possibly this argument has been discussed before, but I don't remember.

Marco IK1ODO

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