Hi Randy,
Look TL866 USB Programmer.
Roumen
On Wed, Nov 8, 2017 at 5:23 AM, Todd Micallef wrote:
> Randy,
>
> I use the GQ-4X from mcumall.com. It works great and I have had no
> problems
> with it. I have bought a few adapters to support PLCC and SOIC packages.
>
> For the NVRAM, don't overlook the STMicroelectronics memory. I have used
> the M48Z12 as a direct replacement.with no issues. The only thing I didn't
> like was the date code format on the part. They only list the last digit of
> the year and week. I guess if you replace it every 10 years it is not an
> issue.
>
> Todd.
>
> On Tue, Nov 7, 2017 at 10:08 PM, Randy Evans
> wrote:
>
> > 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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