Assuming the following application conditions: Maximum ambient temperature TAmax = 82 °C (measured according to JESD51-2), IDDmax = 50 mA, VDD = 3.5 V, maximum 20 I/Os used at the same time in output at low level with IOL = 8 mA, VOL= 0.4 V and maximum 8 I/Os used at the same time in output at low level with IOL = 20 mA, VOL= 1.3 V PINTmax = 50 mA × 3.5 V= 175 mW PIOmax = 20 × 8 mA × 0.4 V + 8 × 20 mA × 1.3 V = 272 mW This gives: PINTmax = 175 mW and PIOmax = 272 mW: PDmax = 175 + 272 = 447 mW Thus: PDmax = 447 mW
Using the values obtained in Table 70 TJmax is calculated as follows: – For LQFP100, 46 °C/W TJmax = 82 °C + (46 °C/W × 447 mW) = 82 °C + 20.6 °C = 102.6 °C This is within the range of the suffix 6 version parts (–40 < TJ < 105 °C).
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