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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.
Ultra-low-voltage, level translating, 34-bit I2C-bus/SMBus I/O expander
Ultra-low-voltage Fm+ I2C-bus, SMBus I/O expander
Low-voltage translating Fm I2C-bus, SMBus I/O expander
Discover the advantages of the I2C based I/O expanders.
Learn more as we dive deeper into this subject matter with experts from our High-Performance Analog team.
The PCAL6534 is a 34-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the Fast-mode Plus (Fm+) I2C-bus interface.
Agile I/O versions reduce system cost and ease software development.Read the brochure
Selector guide of interface components for all your design needs.Read the selector guide
Discover other solutions we offer for your designs.Read the brochure
NXP’s robust portfolio of automotive-compliant products includes over 700 devices and solutions that help enable breakthrough automotive designs.Read the fact sheet