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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM8AL3136 датащи(PDF) 119 Page - STMicroelectronics |
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STM8AL3136 датащи(HTML) 119 Page - STMicroelectronics |
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119 / 124 page  DocID18474 Rev 7 119/124 STM8AL313x/4x/6x STM8AL3L4x/6x Package information 123 10.5 Thermal characteristics The maximum chip junction temperature (TJmax) must never exceed the values given in Table 19: General operating conditions. The maximum chip-junction temperature, TJmax, in degree Celsius, may be calculated using the following equation: TJmax = TAmax + (PDmax x ΘJA) Where: • TAmax is the maximum ambient temperature in ° C •ΘJA is the package junction-to-ambient thermal resistance in ° C/W • PDmax is the sum of PINTmax and PI/Omax (PDmax = PINTmax + PI/Omax) • PINTmax is the product of IDD and VDD, expressed in Watts. This is the maximum chip internal power. • PI/Omax represents the maximum power dissipation on output pins Where: PI/Omax = Σ (VOL*IOL) + Σ((VDD-VOH)*I OH), taking into account the actual VOL/IOL and VOH/IOH of the I/Os at low and high level in the application. Table 68. Thermal characteristics(1) 1. Thermal resistances are based on JEDEC JESD51-2 with 4-layer PCB in a natural convection environment. Symbol Parameter Value Unit ΘJA Thermal resistance junction-ambient LQFP48- 7 x 7 mm 65 °C/W Thermal resistance junction-ambient LQFP32 - 7 x 7 mm 59 Thermal resistance junction-ambient VFQFPN32 - 5 x 5 mm 62 |
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