Help identifying an SMD IC

Nov 24, 2008 3 Replies
R

Hi,



I am trying to repair a damaged motherboard (it's a special PowerPC motherboard) and one particular component was scorched and became impossible to identify.



I obtained a high resolution photograph of the component in it's original state from another owner of this board.



I don't know if this component can be identified though, (certainly not by me anyway, with my meagre experience).



I was wondering if anyone might have any tips or a clue what the part might be...



The part is labelled "C042" and a high resolution picture of the board is here:



(Note: 800KB)



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The part is U26 on this board, approximately right in the middle of the photo)



Thanks for any tips,



Regards,



Ross..


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F

On Mon, 24 Nov 2008 22:44:00 +1100, Ross Vumbaca put finger to keyboard and composed:

My first thought was that it may be a supervisor IC that holds the board in a reset state until the supply reaches a predetermined threshold. Searching for "C042" at ...

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... brings up an Exar part.

Exar make many supervisor ICs, but I couldn't find a likely candidate at the following URL:

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It is possible that "C042" is a code which identifies the threshold voltage. Many supervisor ICs use such a marking method.

- Franc Zabkar

Please remove one \'i\' from my address when replying by email.
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On Tue, 25 Nov 2008 06:08:43 +1100, Franc Zabkar put finger to keyboard and composed:

On second thoughts, I think I was wrong.

Instead I think it may be an SN74LVC1G04DBVR or SN74LVC1G04DBVT "single inverter gate".

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Page 2 of the datasheet states that the top side marking is "C04_", where the last digit indicates the "assembly/test site".

- Franc Zabkar

Please remove one \'i\' from my address when replying by email.
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R

Thanks heaps for your help, really appreciated. I wasn't able to even find a lead..

Best regards,

Ross..

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