Datasheet

DocID025743 Rev 6 93/106
STM32F031x4 STM32F031x6 Package information
102
7.5 WLCSP25 package information
WLCSP25 is a 25-ball, 2.423 x 2.325 mm, 0.4 mm pitch wafer level chip scale package.
Figure 43. WLCSP25 package outline
1. Drawing is not to scale.
Table 65. WLCSP25 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) (4)
0.220 0.250 0.280 0.0087 0.0098 0.0110
D 2.388 2.423 2.458 0.0940 0.0954 0.0968
E 2.29 2.325 2.36 0.0902 0.0915 0.0929
e - 0.400 - - 0.0157 -
e1 - 1.600 - - 0.0630 -
e2 - 1.600 - - 0.0630 -
F - 0.4115 - - 0.0162 -
G - 0.3625 - - 0.0143 -
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