I could not determine which connector is 100% compatible with this cable (notches are usually somwhere else).
 Hirose FH35C-17S seems to be OK here,

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2024-10-04 07:30:04

I could not determine which connector is 100% compatible with this cable (notches are usually somwhere else). Hirose FH35C-17S seems to be OK here, just two pins on each side are not connected. The FPC is too thin (0.1 mm instead of 0.2 mm), so I added a bit of kapton tape. Also counterfeit chinese connector (white instead of brown) seems to have wrong internal dimensions, so I had to adjust a cable position in it.

Seems like noone tried to find the datasheet. All circuits with these sensors use 2.8V regulators which is totally redundant. The chip works fine with 3.3V logic and 3 kOhm pull-ups on I2C pins.

At one point i mixed the +1.8 and +3.3 power inputs. Surprisingly the sensor almost worked -- it had i2c address 0x33 and registers were available for reading.

I highly recommend reading the datasheet Notes on Power-up section (page 15). It tells how to enable finger presence detection, configure speed switching, enable i2c burst mode.

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