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Apogee Semiconductor APIO16 Rad-Hard I/O Expander
Apogee Semiconductor APIO16 Rad-Hard I/O Expander provides robust and flexible I/O expansion capabilities with voltage level translation, ensuring reliable operation across varying supply voltages. The architecture supports two independent supply rails: VCCI powers the serial interface logic, while VCCP powers the I/O ports. This separation enables seamless interfacing between low-voltage microcontrollers and higher-voltage peripherals. The Apogee Semiconductor APIO16 implements an SMBus-compatible I2C or SPI-based serial bus with two 8-bit ports that an external host can control or read on the bus.