Datasheet

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DocID026284 Rev 4 101/128

STM32F091xB STM32F091xC Package information

124

Figure 34. Recommended footprint for UFBGA100 package

b 0.240 0.290 0.340 0.0094 0.0114 0.0134

D 6.850 7.000 7.150 0.2697 0.2756 0.2815

D1 - 5.500 - - 0.2165 -

E 6.850 7.000 7.150 0.2697 0.2756 0.2815

E1 - 5.500 - - 0.2165 -

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 71. UFBGA100 recommended PCB design rules

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 70. UFBGA100 package mechanical data (continued)

Symbol

millimeters inches

(1)

Min. Typ. Max. Min. Typ. Max.

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'SDG

'VP

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