Announcement

**truclacicr** · 11-16-2024, 08:07 PM

This set of schematics has a pinout for the NCT3949S:

https://pdfcoffee.com/download/asus-...-pdf-free.html

It is described as "NCT3949S DC/PWM fan detection driver controller for desktop and notebook computers".

https://www.nuvoton.com/export/sites...nualreport.pdf

These are potentially similar ICs with a different pinout:

https://www.nuvoton.com/resource-fil...NCT3941SA1.pdf

https://www.nuvoton.com/export/resource-files/DA00-NCT3940SA1.pdf

https://www.datasheetarchive.com/datasheet/NCT3942S%20TR/Nuvoton-Technology?id=f869003683cb7f92&term=nct394 (NCT3942S)

Attached Files

**truclacicr** · 11-16-2024, 08:07 PM

This set of schematics has a pinout for the NCT3949S:

https://pdfcoffee.com/download/asus-...-pdf-free.html

It is described as "NCT3949S DC/PWM fan detection driver controller for desktop and notebook computers".

https://www.nuvoton.com/export/sites...nualreport.pdf

These are potentially similar ICs with a different pinout:

https://www.nuvoton.com/resource-fil...NCT3941SA1.pdf

https://www.nuvoton.com/export/resource-files/DA00-NCT3940SA1.pdf

https://www.datasheetarchive.com/datasheet/NCT3942S%20TR/Nuvoton-Technology?id=f869003683cb7f92&term=nct394 (NCT3942S)

Attached Files

**deep000** · 11-17-2024, 06:13 AM

Thanks for sharing.
This will seem like a stupid question, why in the image there are 14 pins while mine has 8 pins.
And I have the impression that none of them are connected to ground.
I am a beginner in electronics, and I try to learn by repairing my broken devices.

**harp** · 11-17-2024, 10:28 AM

why in the image there are 14 pins while mine has 8 pins. And I have the impression that none of them are connected to ground. ?............... it is only different packages, same device, your chip has ground plane soldered on pcb

Attached Files

**deep000** · 11-18-2024, 05:48 AM

Originally posted by harp View Post

why in the image there are 14 pins while mine has 8 pins. And I have the impression that none of them are connected to ground. ?............... it is only different packages, same device, your chip has ground plane soldered on pcb

ah ok, that makes sense.
Thanks

Announcement

NUVOTON 3949s

NUVOTON 3949s

Comment

Comment

Comment

Comment

Comment