XRA1200PIG16TR-F

The XRA1200PIG16TR-F from Exar Corporation is an 8-bit General Purpose Input/Output (GPIO) expander designed with an I2C/SMBus interface. This component is suitable for applications requiring additional I/O pins, operating within a voltage range of 1.65V to 3.6V. It supports I2C clock frequencies up to 400kHz and features 5V tolerant inputs.

The device offers individually programmable inputs and outputs. As outputs, the GPIOs can be set to high, low, or three-state mode, which is beneficial for applications where remote devices may lose power but remain connected. As inputs, internal pull-up resistors can be enabled or disabled, and input polarity can be inverted. The interrupt functionality is programmable for various behaviors, including rising edge, falling edge, or both edges, and can be cleared by input state changes or by reading the input state.

Internally, the XRA1200P includes 100K ohm pull-up resistors on each I/O pin that can be individually enabled. The XRA1200P variant has these pull-up resistors enabled upon power-up for a known input state. The component is available in a 16-pin TSSOP package, suitable for surface mounting.

This GPIO expander is pin and software compatible with parts like the CAT9534, PCA9534, CAT9554, and PCA9554, as well as pin compatible with PCA9554A and TCA9554A, offering flexibility in design choices.