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RWeil.2
RWeil.2
Associate III
November 2, 2023
Solved

Current consumption of FT pin (error in datasheet?)

  • November 2, 2023
  • 2 replies
  • 2150 views

Hi,

is there an error in the datasheet? The data seems counterintuitive:

FT pin input leakage current (max.) is
- 150 nA for 0 to VDD
-2500 nA for VDD to VDD+1V
-250 nA for VDD+1V to 5,5V

Shouldn´t the last value be in uA perhaps?

current consumption.png

Kind regards
René

This topic has been closed for replies.
Best answer by Remi QUINTIN

There is no error. it is indeed nA as unit.

The reason of a higher leakage when VDD is in the window VDD max -> VDD max + 1V is the mechanism managing the 5V tolerance of the pin. This mechanism is less optimized in this window than in the window VDD max +1V -> 5.5V where all transistors ensuring the 5V tolerance are well biased, thus generating a lower leakage.

 

2 replies

S
Sarra.S
ST Employee
November 2, 2023

Hello @RWeil.2, 

I'm checking this internally, I will get back to you.

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Remi QUINTIN
Remi QUINTINBest answer
Technical Moderator
November 7, 2023

There is no error. it is indeed nA as unit.

The reason of a higher leakage when VDD is in the window VDD max -> VDD max + 1V is the mechanism managing the 5V tolerance of the pin. This mechanism is less optimized in this window than in the window VDD max +1V -> 5.5V where all transistors ensuring the 5V tolerance are well biased, thus generating a lower leakage.

 

    RWeil.2
    RWeil.2Author
    Associate III
    November 9, 2023

    Thank you for the clarification!

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