I have twenty KA75330, I grabbed 5 or 6 to test with a AAA cell at ~1.57V and a lithium cell at ~4.10V.
Battery positive to pin #1 (input) and battery negative to pin #2 (ground).
Voltage on pin #3 (output) measures 0V.
Multimeter is resistance mode, measuring between pin #2 (ground) and pin #3 (output);
Black probe on ground and red probe on output measures about 9.8MΩ.
Red probe on ground and black probe on output measures about 4.6MΩ.
The results are exactly the same for both 1.57V and 4.10V, on all 5 or 6 that I tested.