[time-nuts] FE-5680A GPS discipline board on sale now

Nick Sayer nsayer at kfu.com
Sat May 21 11:37:40 EDT 2016


You're right. The EEPROM of concern is the one in the 5680. Since they're used, you have no idea how many writes they've already endured (likely a low number), and they're quite old.  

Sent from my iPhone

> On May 20, 2016, at 3:20 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Mark
> By todays standards yes. But they were not that great 10 years ago.
> So I may be crossing wires. I am speaking off the eeprom in the 5680 and I
> think you are speaking to the one in the AVR. That would be of the modern
> type.
> Regards
> Paul
> WB8TSL
> 
>> On Fri, May 20, 2016 at 5:31 PM, Mark Sims <holrum at hotmail.com> wrote:
>> 
>> I think the EEPROM in AVR chips is rated at 100,000 writes.   Several
>> people have tested them and most found they would survive at least 5
>> million writes... YMMV, of course.
>> ------------------------
>> One write every 24 hours is still under
>> 10K writes in a reasonable lifespan for a GPSDO. It’s a rare eeprom that
>> is rated that low.
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