Hello everyone! For the record, I found the answer. Credits to user testerfan on gbatemp.net foruns.
it's not a MOSFET, it's an ESD Protection and Signal Booster for HDMI Source IC, made by STMicroelectronics, and 740 is just a production date code (2017, week 40), the NF is a correct marking for the IC (D is for manufacturing location), but you can't buy it, because STMicroelectronics hasn't released it to the public yet (there is no datasheet for it), so at this moment you can only get it from a donor board
Link for the original post here
Currently, there is no other way to get it except through donor boards as ST Microelectronics does not sell them.
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