gEDA-user: [SOT] suggestion for a SMT switch

[Jason <geda@xxxxxxxxxxxxxx>]

All,

I'm using geda (hence the S.lightly in SOT :-) ) to build a small, ~ 1
inch by 1 inch board.  It has a PIC10F202 on it and a small vibrating
motor.  I need to turn the motor on and off with the pic.  The board is
powered by a 3V coin cell.

Since the motor typically draws 100mA, and the pic can only source/sink
20mA, I need a switch.  I've looked at transistors, MOSFETs, and now CMOS.

The NXP 74CBTLV1G125 [1] looks like what I need.  The package fits my
size requirements (SOT23-ish), and everything I can figure out in the
datasheet [2] looks good.

Two things concern me.  I'm new to circuit/board design and I'm probably
missing something obvious.  Is there a different part I should look at
before I commit to this one?  It would be nice to find a cheaper
alternative that is just as good, or close.

Second, the pic has weak pull-up resistors on two of its outputs (GP0
and GP1), so I don't need an external pull-up on the OE pin of
74CBTLV1G125. Do I need a large resistor between the pic output pin and
the OE input pin of the 74CBTLV1G125?

It's not a problem if I do, I'm just trying to reduce component count
wherever possible.  I've been unable to find any reference circuits or
application notes for this chip...  :-(

tia,

Jason.

[1] - http://www.nxp.com/pip/74CBTLV1G125_1.html#
[2] - http://www.nxp.com/documents/data_sheet/74CBTLV1G125.pdf



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