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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