www.DataSheet4U.com Cypress Semiconductor CY8C952.
CY8C9540 - (CY8C9520 - CY8C9560) I/O Expander
CY8C9560 - (CY8C9520 - CY8C9560) I/O Expander
CY8C9520 - (CY8C9520 - CY8C9560) I/O Expander
CY8C9520A - 20 - 40 and 60 Bit I/O Expander
