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ST7LITE1 Arkusz danych(PDF) 92 Page - STMicroelectronics |
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ST7LITE1 Arkusz danych(HTML) 92 Page - STMicroelectronics |
92 / 131 page ST7LITE1 92/131 13.2 ABSOLUTE MAXIMUM RATINGS Stresses above those listed as “absolute maxi- mum ratings” may cause permanent damage to the device. This is a stress rating only and func- tional operation of the device under these condi- tions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. 13.2.1 Voltage Characteristics 13.2.2 Current Characteristics 13.2.3 Thermal Characteristics Notes: 1. Directly connecting the I/O pins to VDD or VSS could damage the device if an unexpected change of the I/O configura- tion occurs (for example, due to a corrupted program counter). To guarantee safe operation, this connection has to be done through a pull-up or pull-down resistor (typical: 10k Ω for I/Os). Unused I/O pins must be tied in the same way to V DD or VSS according to their reset configuration. 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. For true open-drain pads, there is no positive injection current, and the corresponding VIN maximum must always be respected 3. All power (VDD) and ground (VSS) lines must always be connected to the external supply. 4. 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 1.6mA. In addition, it is recommended to inject the current as far as possible from the analog input pins. 5. No negative current injection allowed on PB0 and PB1 pins. 6. 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) maxi- mum current injection on four I/O port pins of the device. Symbol Ratings Maximum value Unit VDD - VSS Supply voltage 7.0 V VIN Input voltage on any pin 1) & 2) VSS-0.3 to VDD+0.3 VESD(HBM) Electrostatic discharge voltage (Human Body Model) see section 13.7.3 on page 104 V Symbol Ratings Maximum value Unit IVDD Total current into VDD power lines (source) 3) 100 mA IVSS Total current out of VSS ground lines (sink) 3) 100 IIO Output current sunk by any standard I/O and control pin 25 Output current sunk by any high sink I/O pin 50 Output current source by any I/Os and control pin - 25 IINJ(PIN) 2) & 4) Injected current on RESET pin ± 5 Injected current on OSC1 and OSC2 pins ± 5 Injected current on PB0 and PB1 pins 5) +5 Injected current on any other pin 6) ± 5 ΣI INJ(PIN) 2) Total injected current (sum of all I/O and control pins) 6) ± 20 Symbol Ratings Value Unit TSTG Storage temperature range -65 to +150 °C TJ Maximum junction temperature (see Table 21, “THERMAL CHARACTERISTICS,” on page 119) 1 |
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