31 Aug
2014
31 Aug
'14
5:59 a.m.
On Aug 30, 2014, at 23:35, Jim Brain <brain at jbrain.com> wrote:
On a 4116, pin 1 is -5V, while the 4164 is N/C. Every guide online says to snip off pin
1 if migrating to 4164s in a 4116 footprint, but I don't understand why. If pin 1 on
a 4164 is truly N/C, then why does it matter if the pin is inserted?
Because NC does not always mean "not connected"; sometimes it's meant as
"no-connect". Such pins are occasionally connected to test points, ground, etc.
But with enough trial and error, you could probably determine if it's safe on a 4164,
which may vary per brand and lot.
- Dave