Datasheet

ManualsBrandsST ManualsEmbedded Processors & ControllersMicrocontroller 32bit 128KB LQFP
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DS6329 Rev 16 155/184
STM32F20xxx Package information
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Figure 80. WLCSP64+2 - 66-ball, 4.539 x 4.911 mm, 0.4 mm pitch wafer level chip scale 
package recommended footprint
 
e2 - 3.200 - - 0.1260 -
F - 0.220 - - 0.0087 -
G - 0.386 - - 0.0152 -
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 89. WLCSP64 recommended PCB design rules (0.4 mm pitch) 
Dimension Recommended values
Pitch 0.4
Dpad 0.225 mm
Dsm
0.290 mm typ. (depends on the soldermask 
registration tolerance)
Stencil opening 0.250 mm
Stencil thickness 0.100 mm
Table 88. WLCSP64+2 - 66-ball, 4.539 x 4.911 mm, 0.4 mm pitch wafer level chip scale 
package mechanical data (continued)
Symbol
millimeters inches
(1)
Min Typ Max Min Typ Max
$);B)3B9
'SDG
'VP
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