Datasheet

ManualsBrandsST ManualsEmbedded Processors & ControllersMicrocontroller 32bit 256KB LQFP
251
252
253
254
255
256
257
258
259
260
DS10198 Rev 8 255/270
STM32L476xx Package information
263
7.6  WLCSP72 package information
Figure 72. WLCSP - 72-ball, 4.4084 x 3.7594 mm, 0.4 mm pitch wafer level chip
scale package outline
1. Drawing is not to scale.
 
Table 128. WLCSP - 72-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 -
F - 0.6042 - - 0.0238 -
G - 0.2797 - - 0.0110 -
A02R_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
E
e
e1
e
G
F
e2
A3
b (72X)
X Y
Ø
ddd M
Z
Ø
ccc M
Z
Z
eee
Z
bbb
Z
X
Y
aaa
Bump
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