Found 4 alternatives for CY7C63813-PXC by Rochester Electronics, LLC. Interface Controllers — 18-DIP (0.300", 7.62mm).
IC IRDA CONTROLLER DTE/DCE 18DIP
IC IRDA CONTROLLR DTE/DCE 18DIP
IC IRDA PROTOCOL CTRLR 18DIP
IC IRDA STD CONTROLLER 18DIP