JEDEC Publication No. 95
Page 1-1
SECTION 1: PREPARATION AND SUBMISSION OF SOLID STATE PRODUCT
OUTLINE DRAWINGS
1.1 Purpose of outlines
a) An outline should show all the dimensional and geometrical characteristics of a package needed to
assure mechanical interchangeability with all other packages conforming to the same outline.
b) An outline should service a package user by specifying the general package configuration; the size,
location and number designation of terminals; the space required by the packages; the size and
location of surfaces for mounting heat sinks; body size for mechanical handling etc.
1.2 Terms and definitions
The following definitions will assist in the understanding and preparation of outline drawings:
240SP: A vertical DIMM socket with a module seating plane of 2.40 mm maximum above the
motherboard (Formally known as LSP).
295SP: A vertical DIMM socket with a module seating plane of 2.95 mm maximum above the
motherboard.
330SP: A vertical DIMM socket with a module seating plane of 3.30 mm maximum above the
motherboard.
base plane: A plane parallel to the seating plane through the lowest point on the body of the package. It
may coincide with the seating plane.
body: That part of the package or device exclusive of electrical terminals, studs, leads, etc.
component area: The zone(s) of a PCB (or substrate) within which components are permitted to be
mounted.
NOTE The thickness of the populated PCB is allowed to exceed the specified thickness of the unpopulated PCB in
these areas.
Component keep-out area: The zone(s) of a PCB (or substrate) within which no components are
permitted to be mounted.
NOTE The thickness of the populated PCB is not allowed to exceed the specified thickness of the unpopulated
PCB in these areas.
Component overhang area: The zone(s) of a PCB (or substrate) within which no components are
permitted to be mounted but which underlie overhanging portions of components mounted within the
component area.
NOTE The thickness of the populated PCB is allowed to exceed the specified thickness of the PCB in these areas.
gauge plane: A plane perpendicular to the terminal leads located at a defined distance from the seating
plane. The location of the terminals is measured in the gauge plane.
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