STM8S103K3T6C Datasheet, PDF (105/117 Pages) STMicroelectronics – Access line, 16 MHz STM8S 8-bit MCU, up to 8 Kbytes Flash, data EEPROM,10-bit ADC, 3 timers, UART, SPI, I²C

STM8S103K3 STM8S103F3 STM8S103F2
Thermal characteristics
12.1
12.2
Reference document
JESD51-2 integrated circuits thermal test method environment conditions - natural convection
(still air). Available from www.jedec.org.
Selecting the product temperature range
When ordering the microcontroller, the temperature range is specified in the order code.
The following example shows how to calculate the temperature range needed for a given
application.
Assuming the following application conditions:
• ^{Maximum ambient temperature T}Amax^{= 75 °C (measured according to JESD51-2)}
• ^IDDmax ^{= 8 mA, V}DD ^{= 5 V}
• ^{Maximum 20 I/Os used at the same time in output at low level with}
I_OL = 8 mA, V_OL= 0.4 V
P_{INTmax =} 8 mA x 5 V = 400 mW
Amax
• ^PDmax = ⁴⁰⁰ mW + ^{64 mW}
Thus: P_Dmax = 464 mW
T_Jmax for LQFP32 can be calculated as follows, using the thermal resistance Θ_JA:
T_Jmax = 75 °C + (60 °C/W x 464 mW) = 75 °C + 27.8 °C = 102.8 °C
This is within the range of the suffix 6 version parts (-40 < T_J < 105 °C).
In this case, parts must be ordered at least with the temperature range suffix 6.
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