[volt-nuts] Wanted - UK source of a replacement battery (type LX 1634) for HP 3457A 6.5 digit multimeter

Dr. David Kirkby (Kirkby Microwave Ltd) drkirkby at kirkbymicrowave.co.uk
Sun Jan 24 17:51:27 EST 2016

On 24 January 2016 at 22:46, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:

> --------
> In message <CANX10hDC=Nq=nv_6pi4mgX53OYtqzCbdvPjGVwrX=
> T305G+rFA at mail.gmail.com>
> , "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:
> >Thank you. That is certainly important if that's the case. I can't seem to
> >find a data sheet on the exact SRAM in my 3457A (Toshiba TC5564PL-15), so
> >difficult to know.
> This one ?
>         www.cryptomuseum.com/spy/fs5000/files/TC5564.pdf
> That looks like vanilla CMOS RAM, and it has a wide range of
> retention VCC, so you should be fine.

No. I had already found that data sheet. My SRAM does not have that extra
"A" in the model - it is a TC5564PL-15 not an TC5564APL-15.  I suspect they
are similar, but I don't have any hard evidence to support that assumption.


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