ATT3000 Series Field-Programmable Gate Arrays
Data Sheet
February 1997
Outline Diagrams
Terms and Definitions
Basic Size (BSC):
Design Size:
Typical (TYP):
Reference (REF):
Minimum (MIN) or
Maximum (MAX):
The basic size of a dimension is the size from which the limits for that dimension are derived
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.
When specified after a dimension, indicates the repeated design size if a tolerance is speci-
fied or repeated basic size if a tolerance is not specified.
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.
Indicates the minimum or maximum allowable size of a dimension.
44-Pin PLCC
Dimensions are in millimeters.
17.65 MAX
16.66 MAX
PIN #1 IDENTIFIER
ZONE
6
1
40
7
39
16.66
MAX
17.65
MAX
17
18
29
28
1.27 TYP
0.53
MAX
0.51 MIN
TYP
4.57
MAX
SEATING PLANE
0.10
5-2506r7(C)
68
Lucent Technologies Inc.