The Renesas IS82C55AZ is a parallel IO expander designed for surface mount applications. It operates within a voltage range of 4.5V to 5.5V and a temperature range of -40°C to 85°C.
The Intersil IS82C55AZ is a parallel IO expander designed for interface applications. It operates within a voltage range of 4.5V to 5.5V and features a surface mountable 44-PLCC package.