15.4 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.

Table 15-3. Injection Current(1,2)
Symbol Description min max Unit
Iinj1 (3) IO pin injection current -1 +1 mA
Iinj2 (4) IO pin injection current -15 +15 mA
Iinjtotal Sum of IO pins injection current -45 +45 mA
Note:
  1. Injecting current may have an effect on the accuracy of Analog blocks
  2. Injecting current on Backup IOs is not allowed

  3. Conditions for Vpin: Vpin < GND-0.6V or 3.6V<Vpin≤4.2V.

    Conditions for VDD: 3V<VDD≤3.6V.

    If Vpin is lower than GND-0.6V, a current limiting resistor is required. The negative DC injection current limiting resistor R is calculated as R = |(GND-0.6V – Vpin)/Iinj1|.

    If Vpin is greater than VDD+0.6V, a current limiting resistor is required. The positive DC injection current limiting resistor R is calculated as R = (Vpin-(VDD+0.6))/Iinj1.

  4. Conditions for Vpin: Vpin < GND-0.6V or Vpin≤3.6V.

    Conditions for VDD: VDD≤3V.

    If Vpin is lower than GND-0.6V, a current limiting resistor is required. The negative DC injection current limiting resistor R is calculated as R = |(GND-0.6V – Vpin)/Iinj2|.

    If Vpin is greater than VDD+0.6V, a current limiting resistor is required. The positive DC injection current limiting resistor R is calculated as R = (Vpin-(VDD+0.6))/Iinj2.