uln2803

Archiver

Is there anything smaller than the 2803 that can handle at least 25mA per
output? I need to drive 12 - 16 LEDs that are 20mA each in as small of a
total form factor as possible.

Thanks,
Eric

Archiver

At 11:23 PM 5/21/2004, Eric Rodemeyer wrote:
>Is there anything smaller than the 2803 that can handle at least 25mA per
>output? I need to drive 12 - 16 LEDs that are 20mA each in as small of a
>total form factor as possible.

If you can get away with a little less current, 74hc595 will drive 8 LEDs
at 10 to 15 mA each. They also have the added advantage of allowing you to
drive as many LEDs as you want from only 3 pins.

If you need more current, the TI TPIC6595 OR TPIC6C595 are good for 200mA
or 100mA respectively. Same 3 wire interface as the 74hc595.

dwayne

--
Dwayne Reid <dwayner@p...>
Trinity Electronics Systems Ltd Edmonton, AB, CANADA
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--- In basicstamps@yahoogroups.com, "Eric Rodemeyer"
<siliconsurfer1@m...> wrote:
> Is there anything smaller than the 2803 that can handle at least
25mA per
> output? I need to drive 12 - 16 LEDs that are 20mA each in as small
of a
> total form factor as possible.
>
> Thanks,
> Eric



use SOP transistors. they are slighly larger than the pads they
connect to.

But, for 16, you might be better off with a MCP23016 it is available
in TSSOP and QFN packages for slightly small size.

Dave