The chip will be bike specific. The 748 is different to the 916, and the SPS is different to the BP etc. If you've not the right one, call JHP or AJ Racing and get one of theirs to suit.
your chip should have a number on it - you can check this with a ducati dealer or do a "search" on this site as someone has listed the chips and serial numbers / bike they are for - also you can download numbers from Ducati.com site. My 45mm carbon Termis came with an odd chip and i put in a JHP one instead (£25 i think) - enjoy
(if it's an aftermarket chip it may well say exactly what it is, eg "916-45mm") and then check these with the Ducati spares catalogue to see which chip it is:
96502394C - 916 Monoposto '94, silencers Racing 965013AAA - 916 Biposto silencers Racing 965015AAA - 996 Racing silencers 965014AAA - 748 Twin-seat silencers Racing 965024AAA - 748R Silencers Racing