9/20/06, v 2.0Alliance MemoryP. 8 of 10
®
Notes
1 Bump counts: 48 (8 row x 6 column).
2 Pitch: (x,y
) = 0.75 mm x 0.75 mm (typ).
3 Units: mil
limeters.
4 All tolera
nce are +/- 0.050 unless otherwise specified.
5 Typ: typic
al.
6 Y is coplanarity: 0.
010 (max).
7 “A1” ID corner must be identified by chamfer, ink mark,
metallized m
arking, indentation or other feature on the pack-
age body.
8 If “A1” ID
corner is on the package body, it must be located
within the zone indicated.
Minimum Typical Maximum
A – 0.75 –
B 7.00 BSC
B1 – 3.75 –
C7.00 BSC
C1 – 5.25 –
D 0.25 0.30 0.40
E 1.14 1.24 1.34
E1 – 0.68 –
E2 0.15 0.20 0.25
Y – – 0.010
48-ball BGA
Bottom View
6 5 4 3 2 1
Ball A1
C1
A
B
C
D
F
G
H
J
A
B1
Side
View
To
p V
iew
Ball #A1 in
dex (see note 7)
C
SRAM DIE
B
Detail V
iew
A
Y
Die
0
.3/T
µ
p
E2
E
Die
D
E1
E2
E
*pin 1 indicator will show as
engraved circle and/or Inc. trade mark
B/4
C/4
(see note 8)
AS7C31026C
