Datasheet
DS10198 Rev 8 247/270
STM32L476xx Package information
263
Figure 64. UFBGA - 132-ball, 7 x 7 mm ultra thin 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.
e - 0.500 - - 0.0197 -
Z - 0.750 - - 0.0295 -
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 124. UFBGA132 recommended PCB design rules (0.5 mm pitch BGA)
Dimension Recommended values
Pitch 0.5 mm
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
Pad trace width 0.100 mm
Ball diameter 0.280 mm
Table 123. UFBGA - 132-ball, 7 x 7 mm ultra thin fine pitch ball grid array
package mechanical data (continued)
Symbol
millimeters inches
(1)
Min Typ Max Min Typ Max
BGA_WLCSP_FT_V1
Dsm
Dpad
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