Injection Current of PIC32

Discussion in 'General Electronics Chat' started by Janani_Rajkiran, Dec 31, 2016.

  1. Janani_Rajkiran

    Thread Starter Member

    Nov 1, 2016
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    Hi!
    Can anyone tell me what is the maximum injection current value for PIC32 on each I/O pin and also the total injection current for that IC?

    It is not specified in the Datasheet.

    Thanks!
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    9,633
    1,109
    The only injection I know is when I visit a doctor. :D
    Did not know PIC32 can take injections. o_O

    Do you mean input current to an I/O and max current drawn by the PIC32 ?
     
  3. spinnaker

    AAC Fanatic!

    Oct 29, 2009
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    Had to look that one up myself.

    Injection current is the current that is being forced into a pin by an input voltage higher than the positive supply or lower than ground. The current flows through the input protection diodes into whichever supply is being exceeded. Ideally, all inputs would be limited to the supply voltages, but the chip can tolerate small excursions above and below as long as the current isn't high enough to damage or disrupt the rest of the circuit.
     
  4. OBW0549

    Distinguished Member

    Mar 2, 2015
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    This information can be found in the data sheet for the processor you are using or in the Family data sheet, in the Electrical Characteristics section under Absolute Maximum Ratings.

    For example, this document shows the following; note the Maximum Current specifications:

    PIC32.png
     
  5. Janani_Rajkiran

    Thread Starter Member

    Nov 1, 2016
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    Hi!

    For example the dspic33 has the following spec as the maximum injection current.

    There is nothing like that mentioned for pic 32.
     
  6. OBW0549

    Distinguished Member

    Mar 2, 2015
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    My earlier post was wrong; for the PIC32 example I linked to, the injection currents are listed in Table 37-10, on page 618.
     
  7. Janani_Rajkiran

    Thread Starter Member

    Nov 1, 2016
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    Hi!

    There is no such page or table in PIC32 datasheet
     
  8. OBW0549

    Distinguished Member

    Mar 2, 2015
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    It would help if you would post a link to the data sheet for the specific PIC32 you are referring to, so we can look at it; the particular PIC32 I cited was chosen at random from a long list of PIC32's on Microchip's web site and may have different specs from yours.
     
    spinnaker likes this.
  9. Janani_Rajkiran

    Thread Starter Member

    Nov 1, 2016
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    Hi!
    I got it for PIC32 thanks! But now I need the same information for MSP430.

    I have attached the Data sheet for your reference. thanks!
     
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