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STLUX385ATR 数据表(PDF) 71 Page - STMicroelectronics |
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STLUX385ATR 数据表(HTML) 71 Page - STMicroelectronics |
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71 / 99 page ![]() DocID024387 Rev 2 71/98 STLUX385A Electrical characteristics 10.3 Operating conditions The device must be used in operating conditions that respect the parameters in the table below. In addition, full account must be taken for all physical capacitor characteristics and tolerances. Table 34. Thermal characteristics Symbol Ratings Max. Unit T STG Storage temperature range -65 to 150 ºC T J Maximum junction temperature 150 Table 35. General operating conditions Symbol Parameter Conditions Min. Typ. Max. Unit f CPU Internal CPU clock frequency -40 ≤ T A ≤ 105 °C 0 16 MHz V DD1 , V DDA1 Operating voltages 3 (1) 1. The external power supply can be within range from 3 V up to 5.5 V although IC performances are optimized for power supply equal to 3.3 V. 5.5 (1) V V DD , V DDA Nominal operating voltages 3.3 (1) 5 (1) V OUT Core digital power supply 1.8 (2) 2. Internal core power supply voltage. C VOUT : capacitance of external capacitor (3) 3. Care should be taken when the capacitor is selected due to its tolerance, its dependency on temperature, DC bias and frequency. at 1 MHz 470 3300 nF ESR of external capacitor (2) 0.05 0.2 Ω ESL of external capacitor (2) 15 nH Θ JA (4) 4. To calculate P Dmax (T A ), use the formula P Dmax = (T Jmax - T A )/ Θ JA . FR4 multilayer PCB 80 °C/W T A Ambient temperature Pd=100 mW -40 105 °C Table 36. Operating conditions at power-up/power-down Symbol Parameter Conditions Min.(1) Typ. Max.(1) Unit t VDD V DD rise time rate 2 μs/V 1 sec/V (2) V DD fall time rate 2 μs/V 1 sec/V (2) t TEMP Reset release delay V DD rising 3 ms |
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