On 05/20/2015 7:15 PM, Richard B. Main, Esq. wrote:
The Intel AFN-00188B Datasheets for 8041A/8741A specify that EA max is
24.5V. The verify mode for PROM/ROM holds EA high at 23V.
The 8048/8748 Datasheets say EA is 32V for 8748 Verify but need only be
+12V for 8048.
Richard
Speaking of old textbooks, something people need to keep an eye out for
are old parts catalogues put out by the large parts distributors of yore.
I have an Electrosonic Catalogues (Canada - 600 some pages of
components!) from the late 60s and it is great because they have
unarchived specifications on many of the early solid state and EM parts
- many of which are used in older computers. One spec sheet I found was
a comparison sheet of CDS cells that were common in 1969 and gave their
range of specs - handy!
The advantage for me is I use these to get the specs on old parts that I
am trying to repair, or replace with more modern parts. At one time
E-Sonic had a few PDFs of these early manuals online, but they seem to
have hidden them since the last time I visited their site. And I just
did a bit of a search using Archive.org's wayback machine and can't find
the year when they did have those on their site...
John :-#)#
