Datasheet

Package information STM32F745xx STM32F746xx
204/227 DocID027590 Rev 4
Marking of engineering samples
The following figure gives an example of topside marking orientation versus ball A1 identifier
location.
Figure 87. WLCSP143, 0.4 mm pitch wafer level chip scale package
top view example
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
Table 116. WLCSP143 recommended PCB design rules
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
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