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MC9RS08KA8CPJ Datasheet(PDF) 6 Page - Freescale Semiconductor, Inc |
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MC9RS08KA8CPJ Datasheet(HTML) 6 Page - Freescale Semiconductor, Inc |
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6 / 42 page  MC9RS08KA8 Series MCU Data Sheet, Rev. 4 Electrical Characteristics Freescale Semiconductor 6 3.3 Absolute Maximum Ratings Absolute maximum ratings are stress ratings only, and functional operation at the maxima is not guaranteed. Stress beyond the limits specified in Table 3 may affect device reliability or cause permanent damage to the device. For functional operating conditions, refer to the remaining tables in this chapter. This device contains circuitry protecting against damage due to high static voltage or electrical fields; however, it is advised that normal precautions be taken to avoid application of any voltages higher than maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused inputs are tied to an appropriate logic voltage level (for instance, VSS or VDD) or the programmable pull-up resistor associated with the pin is enabled. 3.4 Thermal Characteristics This section provides information about operating temperature range, power dissipation, and package thermal resistance. Power dissipation on I/O pins is usually small compared to the power dissipation in on-chip logic and voltage regulator circuits and it is user-determined rather than being controlled by the MCU design. In order to take PI/O into account in power calculations, determine the difference between actual pin voltage and VSS or VDD and multiply by the pin current for each I/O pin. Except in cases of unusually high pin current (heavy loads), the difference between pin voltage and VSS or VDD will be very small. Table 3. Absolute Maximum Ratings Rating Symbol Value Unit Supply voltage V DD –0.3 to 5.8 V Maximum current into VDD IDD 120 mA Digital input voltage VIn –0.3 to VDD + 0.3 V Instantaneous maximum current Single pin limit (applies to all port pins)1, 2, 3 1 Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate resistance values for positive (VDD) and negative (VSS) clamp voltages, then use the larger of the two resistance values. 2 All functional non-supply pins are internally clamped to V SS and VDD except the RESET/VPP pin which is internally clamped to VSS only. 3 Power supply must maintain regulation within operating V DD range during instantaneous and operating maximum current conditions. If positive injection current (VIn > VDD) is greater than IDD, the injection current may flow out of VDD and could result in external power supply going out of regulation. Ensure external VDD load will shunt current greater than maximum injection current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is present, or if the clock rate is very low which would reduce overall power consumption. ID ±25 mA Storage temperature range Tstg –55 to 150 °C Table 4. Thermal Characteristics Rating Symbol Value Unit Operating temperature range (packaged) TA TL to TH –40 to 85 °C Maximum junction temperature TJMAX 105 °C Thermal resistance 16-pin PDIP θ JA 80 °C/W Thermal resistance 16-pin SOIC θ JA 112 °C/W |
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