I'm using a ULN2003 in my current project to light LED's. The ULN2003 
has 7 channels; I need 9 channels however. I could of course get two 
ULN2003's, but I reckon it'd be more economical just to get two NMOS 
transistors for the final two channels.

Would an FDN337 be preferable for this?

I know I could use a BC337 but then I'd need a resistor for the base.

Here's my requirements:

    * On when base/gate is 5 V
    * Off when base/gate is 0 V
    * Able to pass 30 mA DC

Can anyone suggest a setup? So far I'm just thinking of going with the 
FDN337

Also, while I'm asking the question: Can the UDN2981 be used exactly 
like the ULN2003? Or does it need resistors going into the input? Are 
the inputs active-high or active-low? What transistor would you use if 
you wanted an extra channel, FDN338 maybe?

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