Datasheet
Package information STM32L433xx
198/224 DocID028794 Rev 4
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.
Other optional marking or inset/upset marks, which identify the parts throughout supply
chain operations, are not indicated below.
ddd - - 0.080 - - 0.0031
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 104. 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 solder mask
registration tolerance)
Stencil opening 0.280 mm
Stencil thickness Between 0.100 mm and 0.125 mm
Table 103. 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.
$&B)3B9
'SDG
'VP
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