Electronics > Repair

Help identifying this part - 1178H

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daisizhou:

--- Quote from: fzabkar on September 06, 2024, 11:14:54 pm ---Could it be an ESD protection diode array?



--- End quote ---

I separated a normal 1178H from the PCB.
Use the diode range of a digital multimeter to measure each pin separately. The values ​​are shown in the figure below.

fzabkar:
Similar to this?

https://www.ti.com/lit/ds/symlink/tpd4s009.pdf

BTW, could the device be an ECG? That could explain the "SKIN" on the PCB.

daisizhou:

--- Quote from: fzabkar on September 07, 2024, 03:10:41 am ---Similar to this?

https://www.ti.com/lit/ds/symlink/tpd4s009.pdf

BTW, could the device be an ECG? That could explain the "SKIN" on the PCB.

--- End quote ---
https://www.flukebiomedical.com/products/biomedical-test-equipment/incubator-radiant-warmer-analyzers
This is the host introduction.The 5 interfaces below the display are connected to the 1178H

daisizhou:

--- Quote from: fzabkar on September 07, 2024, 03:10:41 am ---Similar to this?

https://www.ti.com/lit/ds/symlink/tpd4s009.pdf

BTW, could the device be an ECG? That could explain the "SKIN" on the PCB.

--- End quote ---

But there is another 3.3v DC voltage coming in,It turns out that the 1178H is short-circuited because the vcc3.3v port and GND are broken down.
I don't see any power supply in your schematic.

fzabkar:
You have some interesting jobs.

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