mils -vs- mm

[aperri]

OK I think I understand the difference between mils and mm but I keep getting it messed up in my head when I read articles on components. For instance in a certain article the author will mention the pitch of a chip to be 25mils then later on he will say something like 10 mm for another chip. Correct me if I am wrong but mils refers to fractions of an inch and mm refers to fractions of a meter...correct?

Anthony

 

[ericgibbs]

OK I think I understand the difference between mils and mm but I keep getting it messed up in my head when I read articles on components. For instance in a certain article the author will mention the pitch of a chip to be 25mils then later on he will say something like 10 mm for another chip. Correct me if I am wrong but mils refers to fractions of an inch and mm refers to fractions of a meter...correct?

Anthony

hi,
Look here:

Mils to Millimeters Conversion Chart at READE

Googled: mils and mm

Definitions:

One mil= A unit of length equal to one-thousandth of an inch, a milliliter, or one cubic centimeter. Used chiefly to specify the diameter of wire

One millimeter= 0.001 meters or 0.03937 inches

 

[duffy]

Yes - a mil is a thousandth of an inch. This has bitten me on the ass before, I told a guy to move a display "ten mils" and he moved it a #@$%&! CENTIMETER.

Thank you for taking the time to learn the difference.