IEC 60191-6-21:2010 specifies methods to measure package dimensions of small outline packages (SOP), package outline form E in accordance to IEC 60191-4.
IEC 60191-6-21 Ed. 1.0 b:2010
$47.00
Mechanical standardization of semiconductor devices – Part 6-21: General rules for the preparation of outline drawings of surface mounted semiconductor device packages – Measuring methods for package dimensions of small outline packages (SOP)