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I have tried to google the different type of code and I cant really confirm that what I suspect I found is actually the right thing so I might want to see if something can confirm my finidng.

enter image description here

I suspect this to be a OP-AMP IC from STM from looking up the code number 464. This board is reading RFID chips and connect to STM32 which I suspect my finding is correct.

Is it possible that this is the releated datasheet of this chip? https://www.st.com/en/amplifiers-and-comparators/ts464.html

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It matches the chip you indicated, TS464CPT enter image description here

Reference for the image

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    \$\begingroup\$ oh great! yeah same :) do you know what 838 means? Is that a package size ? I couldnt figure out why some have 736 and some 838 \$\endgroup\$
    – max246
    Aug 21, 2023 at 12:56
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    \$\begingroup\$ @max246 Likely a lot number. If it's not documented in the datasheet then it's generally not import for identification, but only for the internal tracking by the manufacturer. \$\endgroup\$
    – nanash1
    Aug 21, 2023 at 14:06
  • \$\begingroup\$ @max246 Digit codes may be date codes, in which case "838" could be 38th week of 2018 (or 2008, etc.). \$\endgroup\$ Aug 22, 2023 at 7:47
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This logo definitely is ST, and a manufacturer will not apply the same marking to different devices. So this datasheet, which confirms "646C", must be the correct one.

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  • \$\begingroup\$ thanks, I was sure the logo was that but I wasnt sure if it was some sort of RF decoder ( which in a way it is from reading a reverse engineering ) so I am glad I can figure out it is a OP-AMP :) \$\endgroup\$
    – max246
    Aug 21, 2023 at 12:55

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