[sdiy] And another dumb question ( LM394 related )

[harrybissell]

It shows that if you reverse bias the B-E junction it will conduct. This
will prevent reverse breakdown which ~some~ datasheets indicate will
permantly degrade the device.

How it affects you depends on what you are doing. Its like the back diode
in a MOSFET... it can hurt you, help you, or not affect you....

H^) harry

Tom Arnold wrote:

> On some datasheets for parts, like the LM394 and the CA3039 and others, but
> only some companies datasheets for their own versions, a company will show a
> phantom diode across a couple pins of the parts in the chip ( on the LM394CH
> there is a diode shown from emitter to base of each transistor ).
>
> I was wondering how this affects using the part.  I figure it has to do with
> a connection to the substrate, I just dont know what design considerations
> have to come of it.
>
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