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ST7LITEUS5 数据表(PDF) 94 Page - STMicroelectronics |
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ST7LITEUS5 数据表(HTML) 94 Page - STMicroelectronics |
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94 / 136 page  Obsolete Product(s) - Obsolete Product(s) Obsolete Product(s) - Obsolete Product(s) Electrical characteristics ST7LITEUS2, ST7LITEUS5 94/136 12.3 Operating conditions 12.3.1 General operating conditions TA = -40 to +125 °C unless otherwise specified. Table 44. Current characteristics Symbol Ratings Maximum value Unit IVDD Total current into VDD power lines (source) (1) 1. All power (VDD) and ground (VSS) lines must always be connected to the external supply. 75 mA IVSS Total current out of VSS ground lines (sink) (1) 150 IIO Output current sunk by any standard I/O and control pin 20 Output current sunk by any high sink I/O pin 40 Output current source by any I/Os and control pin -25 IINJ(PIN) (2)(3) 2. IINJ(PIN) must never be exceeded. This is implicitly insured if VIN maximum is respected. If VIN maximum cannot be respected, the injection current must be limited externally to the IINJ(PIN) value. A positive injection is induced by VIN>VDD while a negative injection is induced by VIN<VSS. 3. Negative injection disturbs the analog performance of the device. In particular, it induces leakage currents throughout the device including the analog inputs. To avoid undesirable effects on the analog functions, care must be taken: - Analog input pins must have a negative injection less than 0.8 mA (assuming that the impedance of the analog voltage is lower than the specified limits) - Pure digital pins must have a negative injection less than 1.6 mA. In addition, it is recommended to inject the current as far as possible from the analog input pins. Injected current on RESET pin ± 5 Injected current on any other pin(4) 4. When several inputs are submitted to a current injection, the maximum ΣI INJ(PIN) is the absolute sum of the positive and negative injected currents (instantaneous values). These results are based on characterisation with ΣI INJ(PIN) maximum current injection on four I/O port pins of the device. ± 5 ΣI INJ(PIN) (2) Total injected current (sum of all I/O and control pins)(4) ± 20 Table 45. Thermal characteristics Symbol Ratings value Unit TSTG Storage temperature range -65 to +150 °C TJ Maximum junction temperature (see Section 13: Package characteristics) Table 46. General operating conditions Symbol Parameter Conditions Min Max Unit VDD Supply voltage fCPU = 4 MHz max. 2.4 5.5 V fCPU = 8 MHz max. 3.3 5.5 fCPU CPU clock frequency 3.3 V ≤ V DD≤5.5 V up to 8 MHz 2.4 V ≤V DD<3.3 V up to 4 Obsolete Product(s) - Obsolete Product(s) |
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