I found the original manufacturer.
Infineon
Part Number: TLE4983C-HT E6747
Problem solved.
Thanks for all your help and input.
BTW, this is not a typical Hall Sensor, as I expected...
It is a Programmable True power on sensor
Features:
- TPO True Power On functionality
- Increased BTPO range
- Mono-cell chopped Hall system
- TIM Twisted Independent Mounting
- Dynamic self-calibrating algorithm
- End-of-line programm able switching points
- TC of back-bias magnet programmable
- High sensitivity and high stability of the magnetic switching points
- High resistance to mechanical stress
- Digital output signal (voltage interface)
- Short-circuit protection
- Module style package with two 4.7/47 nF integrated capacitors
- Package: PG-SSO-3-91 with nickel plating
Datasheet enclosed