E-L9823 pin 21 - NC

dcflipflop · ‎2024-11-13

Hi. Looking to use E-L9823 as a replacement in a legacy design.

The datasheet states pin 21 is not connected. Looking to confirm it is a true "no connect" internally on the part. On our existing PCB it will be tied to +24V. Thanks.

dcflipflop · ‎2025-02-11

I opened a case and received the following reply from ST Customer Support. I have not tried the part in circuit yet.

"For N.C. Pins, there is absolutely no connection from the pin labeled NC to the die. So it is floating."

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Harirajan · ‎2025-02-10

Hello ,

Did you find solution? I'm also dealing with the same issue.

dcflipflop · ‎2025-02-11

I opened a case and received the following reply from ST Customer Support. I have not tried the part in circuit yet.

"For N.C. Pins, there is absolutely no connection from the pin labeled NC to the die. So it is floating."

Harirajan · ‎2025-02-11

Ok for my case, they connected it to 24V, still now no issues observed.