It is a part of the 257-LFBGA package. This packaging has a Tray-shape, making it convenient to carry around. A reliable operation requires a temperature that is regulated to 0°C~70°C. It should work as long as you use a 3V~3.6VV power source.
PCI1515ZHK Features
PCI1515ZHK Applications
There are a lot of Rochester Electronics, LLC PCI1515ZHK Controllers Interface ICs applications.