Hi!

On Thu, Jun 12, 2008 at 8:53 AM, Spehro Pefhany <speff@interlog.com> wrote:
>
> For a single channel, there are integrated transistor/resistor combos that
> will do the NPN thing. Some duals might even do the whole thing, maybe
> with an external resistor to control Ib, but the choices are getting a bit
> thinner for reliable operation at 250mA. If you don't mind non-jellybean
> parts, there's even an integrated SMT N-channel MOSFET (with pull-down)
> and PNP BJT that comes close (with an external resistor for Ib).
>
> No good integrated bipolar high-side drivers AFIR, since it's difficult
> to make a good PNP transistor in an IC.

You have the L293: 4 chanels, push-pull, 1A max.
   http://focus.ti.com/docs/prod/folders/print/l293.html

      Daniel.
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