Package information
STM8S003F3 STM8S003K3
10.4.2
Selecting the product temperature range
When ordering the microcontroller, the temperature range is specified in the order code (see
Figure 53: STM8S003F3/K3 value line ordering information scheme(1)).
The following example shows how to calculate the temperature range needed for a given
application.
Assuming the following application conditions:
•
•
•
Maximum ambient temperature T
= 75 °C (measured according to JESD51-2)
Amax
I
= 8 mA, V = 5.0 V
DD
DDmax
Maximum 20 I/Os used at the same time in output at low level with
= 8 mA, V = 0.4 V
I
OL
OL
P
P
8 mA x 5.0 V = 400 mW
INTmax =
= 400 mW + 64 mW
Dmax
Thus: P
= 464 mW
Dmax
Using the values obtained in Section Table 55.: Thermal characteristics T
is calculated
Jmax
as follows for LQFP32 7 x 7 mm = 60 °C/W:
T
= 75 °C + (60 °C/W x 464 mW) = 75 °C + 27.8 °C = 102.8 °C
Jmax
This is within the range of the suffix 6 version parts (-40 < T < 105 °C).
J
In this case, parts must be ordered at least with the temperature range suffix 6.
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