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Our versatile general purpose I/O (GPIO) expanders provide 4, 8, 16, 24 or 40 general-purpose I/O pins for the CPU via the I²C-bus to help designers reduce board space and complexity while simplifying software development and lowering overall system cost.
Our agile I²C GPIO includes features to eliminate external components as pull-up resistors, open-drain outputs, output drive control and input latches to permit faster software development and more robust firmware performance. These GPIOs work with I²C and SPI interfaces and with applications such as: keyboards, IO expansion, driving LED and signal monitoring.
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Ultra-low voltage 14-bit I/O expander and translator with SPI interface
Ultra-low voltage 22-bit I/O expander and translator with SPI
Ultra-low-voltage, level translating, 34-bit I²C-bus/SMBus I/O expander
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Discover the advantages of the I²C based I/O expanders.
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The PCAL6534 is a 34-bit general-purpose I/O expander that provides remote I/O expansion for a majority of microcontroller families via the Fast-mode Plus (Fm+) I²C-bus interface.
Agile I/O versions reduce system cost and ease software development.
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