Datasheet

DS9716 Rev 11 119/139
STM32F401xB STM32F401xC Package information
132
Device marking for UFQFPN48
The following figure gives an example of topside marking orientation versus pin 1 identifier
location. The printed markings may differ depending on the supply chain.
Other optional marking or inset/upset marks, which depend on supply chain operations, are
not indicated below.
Figure 51. UFQFPN48 marking example (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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