[sdiy] tl ic question

[mailing gigaspeeds]

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Hi,

Just starting out and have a couple of questions concerning parts (again 
:p ).

the TL series... there's TL072CP/CN/IP/BCN etc... a bit confusing for a 
beginner :p

For the mankato filter I need for instance tl074BCN but the store where 
I order stuff only has the : TL074CP ... Is it ok to substitute it ?
Where lies the difference, or what is the most important value I have to 
compare in a datasheet to see the difference ?
The low noise model (IP), does it really make a difference ?

I also can't seem to find the : tempco (or temco) 2K +3500ppm/C°, do 
they have alternate names maybe ?

as usual, thx for the help !

Benjamin
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