Datasheet
Package information STM32L476xx
252/270 DS10198 Rev 8
7.5 WLCSP81 package information
Figure 69. WLCSP - 81-ball, 4.4084 x 3.7594 mm, 0.4 mm pitch wafer level
chip scale package outline
1. Drawing is not to scale.
Table 126. WLCSP- 81-ball, 4.4084 x 3.7594 mm, 0.4 mm pitch wafer level chip scale
package mechanical data
Symbol
millimeters inches
(1)
Min Typ Max Min Typ Max
A 0.525 0.555 0.585 0.0207 0.0219 0.0230
A1 - 0.175 - - 0.0069 -
A2 - 0.380 - - 0.0150 -
A3
(2)
- 0.025 - - 0.0010 -
b
(3)
0.220 0.250 0.280 0.0087 0.0098 0.0110
D 4.3734 4.4084 4.4434 0.1722 0.1736 0.1749
E 3.7244 3.7594 3.7944 0.1466 0.1480 0.1494
e - 0.400 - - 0.0157 -
e1 - 3.200 - - 0.1260 -
e2 - 3.200 - - 0.1260 -
A05Z_ME_V1
Top view
Wafer back side
Side view
Detail A
Bottom view
Bump side
A1 ball
location
A1
Detail A
rotated by 90°
D
Seating plane
A2
A
b
E
e
e1
e
G
F
e2
A3
A1 ball
location
Z
aaa
bbb Z
eee
Z
1
9
J
A
X Y
Ø
ddd M
Z
Ø
ccc M
Z
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