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a
255-Ball Chip Scale Package Ball Grid Array [CS_PBGA]
(BC-255-1)
Dimensions shown in millimeters
A1 CORNER
INDEX AREA
17.20
17.00 SQ
16.80
BALL A1
CORNER
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
15.00
BSC SQ
1.00
BSC
TOP VIEW
BOTTOM VIEW
DETAIL A
DETAIL A
3.50
3.00 MAX
0.25 MIN
SEATING
PLANE
0.70
COPLANARITY
0.60
0.20
0.50
BALL DIAMETER
COMPLIANT TO JEDEC STANDARDS MS-034-AAF-1.
012006-0
0.30 MIN