AW: Sockets (was:: Solus Troubleshooting Results)
Haible Juergen
Juergen.Haible at nbgm.siemens.de
Wed Dec 2 13:03:43 CET 1998
>JH wrote:
>
>There are a few ICs that should *never* be used in sockets,
>though. LM339 is one example. (Unless you have a
>hysteresis on each comparator)
>
>I write:
>
>I don't understand this. If the dv/dt is sufficiently high and the
>reference
>input is stable and of low impedance, these comparators seem to
>work fine in sockets, without hysteresis.
>
>-Art
There's a remark about that in the data sheet. Sure, there are applications
where it will work in a socket. Problems occur when your input signals
have high impedance. Using a socket increases stray capacitance,
and feedback from the output is likely. So I retract the "never". It's good
to be careful, though.
JH.
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