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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM8S103F2 датащи(PDF) 107 Page - STMicroelectronics |
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STM8S103F2 датащи(HTML) 107 Page - STMicroelectronics |
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107 / 121 page  DocID15441 Rev 14 107/121 STM8S103F2 STM8S103F3 STM8S103K3 Thermal characteristics 107 12.2 Selecting the product temperature range When ordering the microcontroller, the temperature range is specified in the order code (see Section 13: Ordering information). The following example shows how to calculate the temperature range needed for a given application. Assuming the following application conditions: Maximum ambient temperature TAmax= 75°C (measured according to JESD51-2), IDDmax = 8 mA, VDD = 5 V, maximum 20 I/Os used at the same time in output at low level with IOL = 8 mA, VOL= 0.4 V PINTmax = 8 mA x 5 V= 400 mW PIOmax = 20 x 8 mA x 0.4 V = 64 mW This gives: PINTmax = 400 mW and PIOmax 64 mW: PDmax = 400 mW + 64 mW Thus: PDmax = 464 mW. Using the values obtained in Table 58: Thermal characteristics on page 106 TJmax is calculated as follows: For LQFP32 60 °C/W TJmax = 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 < TJ < 105 °C). Parts must be ordered at least with the temperature range suffix 6. |
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