MXL82404

MxL82404

8-bit SPI GPIO Expander Data Sheet

General Description

Features

■ 1.62V to 5.5V operating voltage ■ 8 General Purpose I/Os (GPIOs) ■ Maximum standby current of 1A at +1.8V ■ SPI Bus interface ■ SPI Clock frequency up to 26MHz ■ Integrated level shifters ■ Individually programmable inputs

The MxL82404 is an 8-bit GPIO expander with an SPI interface. After power-up, the MxL82404 has internal 100k pull-up resistors on each I/O pin that can be individually enabled.

In addition, the GPIOs on the MxL82404 can individually be controlled and configured. As outputs, the GPIOs can be outputs that are high, low, or in three-state mode. The three-state mode feature is useful for applications where the power is removed from the remote devices, but they may still be connected to the GPIO expander.

Internal pull-up resistors Polarity inversion Individual interrupt enable Rising edge and/or falling edge interrupt Input filter ■ Individually programmable outputs

As inputs, the internal pull-up resistors can be enabled or disabled and the input polarity can be inverted. The interrupt can be programmed for different behaviors.