Help needed to ID this 16-Pin IC P55AD-857862

Hi. I need help getting the “Datasheet Info.” for a ( 16-Pin IC ) P55AD-857862

It is on a BOSCH ECU PCB made in Germany sometime between 2005-2006.

There appears to be a “Fairchild Semiconductor” logo on this chip, of which is no longer in business and of which was sold to ON-Semiconductor, but they have no info. on this IC.

I am seeking 1) The Datasheet on this IC AND 2) The Datasheet for its applicable replacement.

Thank you for your assistance, please know that it is most appreciated.