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297-Ball Plastic Ball Grid Array [PBGA]
(B-297)
Dimensions shown in millimeters
a
27.20
27.00 SQ
26.80
A1 CORNER
INDEX AREA
26 24 22 20 18 16 14 12 10 8
6
4
2
9
3
5
25 23 21 19 17 15 13 11
7
1
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
T
U
V
W
Y
AA
AB
AC
AD
AE
AF
A1 BALL
PAD CORNER
BOTTOM VIEW
24.20
24.00 SQ
23.80
TOP VIEW
25.00
BSC SQ
1.00
BSC
2.43
2.23
2.03
8.00
BSC SQ
DETAIL A
1.22
1.17
1.12
DETAIL A
0.61
0.56
0.51
0.50 NOM
0.40 MIN
0.70
0.60
0.50
BALL DIAMETER
COMPLIANT TO JEDEC STANDARDS MS-034-AAL-1
COPLANARITY
0.20 MAX
SEATING
PLANE