Datasheet

DocID028794 Rev 4 207/224
STM32L433xx Package information
219
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.
Figure 56. WLCSP64 marking (package top view)
1. Parts marked as ES or E or accompanied by an Engineering Sample notification letter are not yet qualified
and therefore not approved for use in production. ST is not responsible for any consequences resulting
from such use. In no event will ST be liable for the customer using any of these engineering samples in
production. ST’s Quality department must be contacted prior to any decision to use these engineering
samples to run a qualification activity.
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