yann_sun said:
hi, everyone
Datasheet says NC pin of all 18 pins exist. For what kind of use?
Thanks
In most case, NC = no connection, more accurate is "No Internal Connection". And on boards these NC pins can be left unconnected, or connected to elsewhere at your convenience.
However, in some, very rare, cases, with some ICs, NC does not really mean "No Connection", it can be connected internally with substrate for examples, so it really means that "No Function" instead, and you cannot connect it at your convenience.
So, although with NC "no connection" pins of ICs, you had better to consult datasheets before connecting or leaving them float on boards.
nguyennam