Forrest W Christian escreveu:
> I'm needing to drive 4 latching relays with 3.3V (8 total coils).   =

> Low-side switching is ok.  The relay I'm looking at is rated for 66.7mA =

> of operating current.
>
> It looks like the ULN280x series could be used at 3.3V, except that the =

> Vce(sat) is over a volt, and the relay has a minimum voltage rating of =

> 2.25V.
>
> What I'd really like to find is the equivalent of eight 2n7000's with =

> integral snubber diodes in a DIP package.
>
> Cheap is always good :)
>
> And no, I don't have 5V available.
>
> -forrest
>   =


Usually the data-sheet shows the worst case Vce(sat) with a high
current. The Vce(sat) for smaller currents are generally much less than
what is in the data-sheet. Good data-sheets show a graphic of Vce(sat) x
Ic x Ib.

Regards,

Isaac

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