when i used the LSF0108 convert the 5V IO to 3.3V ,i probed the 5V IO (B side ) is 3.8V,and the A side also is 3.8V,but the 3.3V power supply is only have 3.28V,and 5V poewr supply is 5V.
the 5V IO side is an output of TPS386000RGPT,it's open drain,the pull up resistor is 4.7K,but even i change the value of resistor referenced of the datasheet page 13 of the LSF0108,the 5V IO side voltage always 3.8V,
the same to the other side,when the A side as a input ,the input level is 3V3 ,when i test the B side,it's shoud be 5V's IO,but the test result is about 3.5V.
by the way ,in my schematic ,the IO have open drain ,and push pull in the same chip