20 Jun
2014
20 Jun
'14
1:56 a.m.
On Thu, Jun 19, 2014 at 11:29 PM, William Maddox <wmaddox at pacbell.net>
wrote:
A superficial examination of the data sheets suggests
that the 74178 might
be a replacement, but I don't have time to compare the specs at the moment.
You're on the right trail. It looks like the 74178 matches the 8270, and
the 74179 matches the 8271. The pinout and function table appear to
match. The 7417x parts are slightly faster and draw slightly more power.
I didn't look at those due to misleading information in the selection guide.