IC packages

shreyas_bhat

Joined Jul 26, 2004
47
Does anybody have a clue wat the "BSC", in the dimension specification for Small Outline packages for ICs actually means.

I need the dimensions of the spacing between two pins in a SOT 23-5 package IC. However, the dimensions are expressed in "0.55 BSC" etc. Therefore, umless I figure out what BSC is, I'm stuck at square one. My efforts on Google, so far have returned futile results.

hgmjr

Joined Jan 28, 2005
9,029
Originally posted by shreyas_bhat@Aug 6 2005, 03:30 PM
Does anybody have a clue wat the "BSC", in the dimension specification for Small Outline packages for ICs actually means.

I need the dimensions of the spacing between two pins in a SOT 23-5 package IC. However, the dimensions are expressed in "0.55 BSC" etc. Therefore, umless I figure out what BSC is, I'm stuck at square one. My efforts on Google, so far have returned futile results.
[post=9477]Quoted post[/post]​
It took some time to find it but in the end here is what I found.

BSC definition

hgmjr

Dave

Joined Nov 17, 2003
6,970
The spacing between the two pins on SOT23 is 1.9mm.