Hi,

On a hard disk mount, there is a chip which, I guess, acts as a switch to
turn on and off the power supply to the hard disk drive depending on a
keyswitch's position.

However, the chip seems to have been fried by plugging in a ribbon cable
with slightly disaligned contacts. As this has happened on four such boards
before the error was found and corrected, it would be nice to replace the
defective components.

I have had no success in identifying those ICs, though - searching for the
identification printed on the chip ("1025 0F1", as far as I can tell) did
not yield any relevant information. The board itself is designated
"MR0ATA100PB", but I did not see even one google hit on this.

Does anyone have an idea what this might be, and where I can get a
replacement in small quantities? This would fit into the hard disk mount
much better than replacing it with discrete components...

In case it helps, I have put photos of the chip and the surroundings onto a
web page at
http://projects.thiemo.net/ChristophChip

Thanks for any hints,
Thiemo
--
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It might be a "hot swap switch," made for shutting down drives in
overcurrent conditions or on demand. Do you know where the rest of the
pins go?

On 26 Oct 2005 22:42:44 GMT, Thiemo Nordenholz
put finger to keyboard and
composed:

On a hard disk mount, there is a chip which, I guess, acts as a switch to
turn on and off the power supply to the hard disk drive depending on a
keyswitch's position.

In case it helps, I have put photos of the chip and the surroundings onto a
web page at
http://projects.thiemo.net/ChristophChip

Could it be a dual P channel MOSFET?
http://pdf.alldatasheet.com/datashee.../datasheet.pdf

-- Franc Zabkar

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

Franc Zabkar writes:

http://projects.thiemo.net/ChristophChip
Could it be a dual P channel MOSFET?
[...] HAT1025R

This looks very sensible, judging from the pinout... Thank you very much!

Best wishes,
Thiemo
--
Query a PGP key server (e.g. http://www.pgp.net/) for my public key 41068629.
Strange sender address? Please see http://www.thiemo.net/misc/list-mail.shtml