AS6YB51216
&
Package diagrams and dimensions
48-ball FBGA
Top View
Bottom View
Ball #A1 Index
6
5
4
3
2
1
Ball #A1
A
B
SRAM Die
C
D
E
C1
C
F
A
G
H
Elastomer
A
B
B1
Detail View
A
Side View
D
Ε2
Ε
E2
Y
E
Die
Die
Ε1
0.3/Typ
Minimum Typ i c a l Maximum
A
B
–
6.90
–
0.75
7.00
3.75
9.0
–
Notes
7.10
–
1. Bump counts: 48 (8 row × 6 column).
2. Pitch: (x,y) = 0.75 mm × 0.75 mm (typ).
3. Units: millimeters.
B1
C
8.4
–
8.6
–
C1
D
5.25
0.35
–
4. All tolerance are 0.050 unless otherwise specified.
5. Typ: typical.
0.30
–
0.40
1.20
–
E
6. Y is coplanarity: 0.08 (max).
E1
E2
Y
–
0.68
0.25
–
0.22
–
0.27
0.08
11/1/01; V.0.9.8
Alliance Semiconductor
P. 10 of 11