54.4 Injection Current
Stresses beyond those listed in the table below may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
| Symbol | Description | min | Typ. | max | Unit | Comments |
|---|---|---|---|---|---|---|
| IICL | Input Low Injection Current | -15 | - | - | mA | Note: 1, 3, 4 This Parameter applies to all pins. |
| IICH | Input High Injection Current | - | - | 15 | mA | Note: 2, 3, 4 This parameter applies to all I/O pins. |
| ∑IICT | Total Input Injection Current (Sum of all I/O and control pins) Absolute value of |∑IICT| | - | - | 45 | mA | Absolute instantaneous sum of all ± input injection currents from all I/O pins.( |IICL| + |IICH|) <∑IICT |
Note:
- VIL source < (VSS - 0.6). Characterized but not tested.
- VIH source > (VDDIO + 0.6) for all I/O pins.
- Injection currents > | 0 | can affect the ADC results by approximately 4 to 6 counts (i.e., VIH Source > (VDDIO + 0.6) or VIL source < (GND - 0.6)).
- Any number and/or combination of
I/O pins not excluded under IICL or IICH conditions are
permitted provided the “absolute instantaneous” sum of the input injection
currents from all pins do not exceed the specified ∑IICT limit. To
limit the injection current the user must insert a resistor in series RS between
input source voltage and device pin. The resistor value is calculated according
to:
- For negative Input voltages less than (GND-0.6): RS ≥ (((GND - 0.6) - VIL source) / IICL)
- For positive input voltages greater than (VDDIO+0.6): RS ≥ ((VIH source - (VDDIO+0.6))/ IICH)
- For Vpin voltages > VDDIO and < GND then RS = the larger of the values calculated above