The information available for the INX IN518 IC indicates it is a specialized component, likely related to display panels or power management, commonly found in laptop and tablet motherboards. Component Overview
To locate pin 1:
Negative voltage used for turning off the TFT pixels. inx in518 ic pinout diagram top
If the component is discussed as an "INX" part in inventory logs, it is simply a variation of the standard 1N series. The pinout remains identical: Band is Negative. The information available for the INX IN518 IC