Package Dimension DIP

Terminology Reference Symbol Description
Nominal dimensions - Mount pad in-line interval
Package length D Largest dimension of the package length excluding terminals
Package width E Largest dimension of the package width excluding terminals
Seated height A Height from the seating plane to the highest point of the package ( including package warp )
1st standoff height A1 Distance from the seating plane to the base plane
Package height A2 Package height ( including package warp )
Terminal pitch e Terminal pitch. This represents theoretical reference dimension.
Terminal in-line interval e1 Distance between the rows of terminals
Terminal width b or bp Width of terminal inserted in attachment hole of printed wiring board
Maximum terminal width 1 b1 Maximum terminal width except for outermost terminal
Maximum terminal width 2 b2 Maximum width of outermost terminal
Terminal thickness c Thickness of terminal with plating
Terminal length L Length from seating plane to terminal tip
Tolerance value of terminal center position M mark Positional tolerance for center axis of the terminal on seating plane. Using the maximum material principle, show the tolerance for maximum terminal width. When terminal width is narrow, allowable tolerance is increased by the difference with the maximum width.
Terminal angle θ Angle between terminal and surface perpendicular to the seating plane
Overhang Z Distance between the center of terminal located at the extreme edge and the package edge.