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Associate II
October 29, 2025
Question

Function of U5 (ST890DTR) in B-G431B-ESC1 Development Board

  • October 29, 2025
  • 2 replies
  • 207 views

1. In the B-G431B-ESC1 development board, there is a component labeled U5 (ST890DTR) in the circuit. Could you please explain the exact purpose or function of this component in the board’s design?

2. If the U5 (ST890DTR) component is removed from the B-G431B-ESC1 development board, what types of issues or malfunctions could occur? Would the impact be considered minor, major, or critical to the board’s operation?

2 replies

GMA
Technical Moderator
October 30, 2025

Hello @Ankitesh,

Refer to ST890 page for feature description and documentation.

If you agree with the answer, please accept it by clicking on 'Accept as solution'.Best regards.GMA
AnkiteshAuthor
Associate II
October 30, 2025

Dear Sir,
I have already the B-G431B-ESC1 development board, I just want to know about U5 (ST890DTR) in the circuit. So that i can remove it. 

 Can you please answer the questions i had mentioned? That will help me.

Senior III
October 31, 2025

Any reason why you want to remove U5 IC?