Hi everyone, so i'm currently having trouble finding datasheets for these 2 ic, first one is LM4505B and second is 2623 UY, anyone have any idea what is the function of these ic?
They belongs to a chinese handheld date printer that my customer ask me to fix but there is no datasheet nor anywhere that sells these ic.

HHope for the best anyway

 

Chances are you won't find a datasheet if you haven't already. They are most likely a proprietary IC custom made for the application.