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STM32L431 bảng dữ liệu(PDF) 173 Page - STMicroelectronics

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STM32L431 bảng dữ liệu(HTML) 173 Page - STMicroelectronics

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STM32L431xx
Package information
197
Figure 46. UFBGA100 - 100-ball, 7 x 7 mm, 0.50 mm pitch, ultra fine pitch ball grid
array
package recommended footprint
Device marking
The following figure gives an example of topside marking orientation versus ball A1 identifier
location.
F
0.700
0.750
0.800
0.0276
0.0295
0.0315
ddd
-
-
0.100
-
-
0.0039
eee
-
-
0.150
-
-
0.0059
fff
-
-
0.050
-
-
0.0020
1. Values in inches are converted from mm and rounded to 4 decimal digits.
Table 91. UFBGA100 recommended PCB design rules (0.5 mm pitch BGA)
Dimension
Recommended values
Pitch
0.5
Dpad
0.280 mm
Dsm
0.370 mm typ. (depends on the soldermask
registration tolerance)
Stencil opening
0.280 mm
Stencil thickness
Between 0.100 mm and 0.125 mm
Table 90. UFBGA100 - 100-ball, 7 x 7 mm, 0.50 mm pitch, ultra fine pitch ball grid array
package mechanical data (continued)
Symbol
millimeters
inches(1)
Min.
Typ.
Max.
Min.
Typ.
Max.



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