[volt-nuts] EPROM Programmer

Randy Evans randyevans2688 at gmail.com
Tue Nov 7 22:08:15 EST 2017


Can someone recommend a good low-cost method to program the DS1220 and
DS1230 NVRAMs for the HP-3458A?  I downloaded the CAL contents and I need
to program new NVRAM chips to replace the older (very old) NVRAMs still in
the unit.

Also, will the DS1220AD and DS1230AD chips work in place of the
existing DS1220Y
and DS1230Y NVRAMs in the HP-3458A?  The AD versions have different timing
"power good" specifications and they don't work as a plug-in substitute in
all cases.  I assume some 3458A users have changed out the NVRAMs with the
new Dallas parts ( Dallas no longer makes the DS1230Y NVRAM, but does still
make the DS1230Y NVRAM, according to their data sheet).

Thanks,

Randy Evans


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