Datasheet

DocID027973 Rev 5 113/119
STM32L011x3/4 Package information
115
TSSOP14 device marking
The following figure gives an example of topside marking versus pin 1 position identifier
location.
Other optional marking or inset/upset marks, which depends assembly location, are not
indicated below.
Figure 51. Example of TSSOP14 marking (package top view)
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.
7.8 Thermal characteristics
The maximum chip-junction temperature, T
J
max, in degrees Celsius, may be calculated
using the following equation:
T
J
max = T
A
max + (P
D
max × Θ
JA
)
Where:
• T
A
max is the maximum ambient temperature in ° C,
•Θ
JA
is the package junction-to-ambient thermal resistance, in ° C/W,
• P
D
max is the sum of P
INT
max and P
I/O
max (P
D
max = P
INT
max + P
I/O
max),
• P
INT
max is the product of I
DD
and V
DD
, expressed in Watts. This is the maximum chip
internal power.
P
I/O
max represents the maximum power dissipation on output pins where:
P
I/O
max = Σ (V
OL
× I
OL
) + Σ((V
DD
– V
OH
) × I
OH
),
taking into account the actual V
OL
/ I
OL
and V
OH
/ I
OH
of the I/Os at low and high level in the
application.
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