11 Jun
2021
11 Jun
'21
8:45 p.m.
On Sat, Jun 12, 2021 at 12:39 AM Jon Elson via cctalk
<cctalk at classiccmp.org> wrote:
On 6/11/21 3:22 PM, Santo Nucifora via cctalk wrote:
The 74151 is an 8:1 multiplexer with complementary outputs.
The 74157 is a quad 2:1 mux.
I can't imagine any defect that would cause one to test out
as the other.
In both cases it would require an input pin to become an output,
something that I can't see how it would happen.
I wonder if in the original list, a '1' was misread as a '7' or vice
versa. I am told that in some countries the '7' is conventionally
written with a crossbar across the downstroke to avoid this. My father
always did this, for all it is not common in England.
-tony
Jon