Data Sheet
November 2006
ORCA Series 2 FPGAs
Package Outline Drawings
Terms and Definitions
Basic Size (BSC): The basic size of a dimension is the size from which the limits for that dimension are derived
Design Size:
S Minimum (MIN) or
Maximum (MAX):
Reference (REF):
SELDEICSTCODNETVIINCUEED Typical(TYP):
by the application of the allowance and the tolerance.
The design size of a dimension is the actual size of the design, including an allowance for fit
and tolerance.
Indicates the minimum or maximum allowable size of a dimension.
The reference dimension is an untoleranced dimension used for informational purposes only.
It is a repeated dimension or one that can be derived from other values in the drawing.
When specified after a dimension, this indicates the repeated design size if a tolerance is
specified or repeated basic size if a tolerance is not specified.
Lattice Semiconductor
175