I2C General Purpose I/O (GPIO)

Our industry-leading 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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I2C General Purpose I/O (GPIO) Portfolio

Part Number Description No of Bits VDD (V) Datasheet Order
PCAL6534 Ultra-low-voltage, level translating, 34-bit I2C-bus/SMBus I/O expander 34 0.8 V to 3.6 V PDF
(2.5 MB)		 Buy
PCAL6524 Ultra-low-voltage Fm+ I2C-bus, SMBus I/O expander 24 0.8 to 5.5 PDF
(2.3 MB)		 Buy
PCAL6416A Low-voltage translating Fm I2C-bus, SMBus I/O expander 16 1.65 to 5.5 PDF
(3.1 MB)		 Buy
PCAL6408A Low-voltage Fm I2C-bus, SMBus I/O expander 8 1.65 to 5.5 PDF
(2.7 MB)		 Buy
PCA9570 Remote 1 MHz I2C GPIO 4 1.1 to 3.6 PDF
(1.7 MB)		 Buy
PCA9555A Low-voltage Fm I2C-bus I/O port with interrupt and weak pull-up 16 1.65 to 5.5 PDF
(2.4 MB)		 Buy
Agile I/O GPIO Brochure Link

Agile I/O GPIO Brochure

Agile I/O versions reduce system cost and ease software development.

System Management I2C and SPI Selector Guide Link

System Management I2C and SPI Selector Guide

Selector guide of interface components for all your design needs.

Solutions Around the Core – Analog, Interfaces, and NFC

Solutions Around the Core – Analog, Interfaces and NFC

Discover other solutions we offer for your designs.