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STM32L151xC/C-A STM32L152xC/C-A
Package information
132
Figure 44. WLCSP64, 0.400 mm pitch package recommended footprint
E
4.876
4.911
4.946
0.1920
0.1933
0.1947
e
-
0.400
-
-
0.0157
-
e1
-
2.800
-
-
0.1102
-
F
-
0.870
-
-
0.0343
-
G
-
1.056
-
-
0.0416
-
aaa
-
-
0.100
-
-
0.0039
bbb
-
-
0.100
-
-
0.0039
ccc
-
-
0.100
-
-
0.0039
ddd
-
-
0.050
-
-
0.0020
eee
-
-
0.050
-
-
0.0020
1. Values in inches are converted from mm and rounded to 4 decimal digits.
2. Dimension is measured at the maximum bump diameter parallel to primary datum Z.
Table 70. WLCSP64, 0.400 mm pitch package recommended PCB design rules
Dimension
Recommended values
Pitch
0.4
Dpad
260 µm max. (circular)
220 µm recommended
Dsm
300 µm min. (for 260 µm diameter pad)
PCB pad design
Non-solder mask defined via underbump allowed.
Table 69. WLCSP64, 0.400 mm pitch package mechanical data (continued)
Symbol
millimeters
inches
(1)
Min
Typ
Max
Min
Typ
Max
069
'VP
'SDG