XRA14xx 8-Bit SPI General Purpose I/O Expanders MaxLinear XRA14xx 8-Bit SPI General Purpose I/O Expanders feature an SPI interface. After power-up, the XRA14xx 8-Bit General Purpose I/O Expanders includes an internal 100K ohm pull-up resistor on each I/O pin that can be individually enabled. In addition, the GPIOs on these MaxLinear XRA14xx 8-Bit General Purpose I/O Expanders can individually be controlled and configured. Applications for these devices include PDAs, cell phones, data, battery-operated, GPS, and BLUETOOTH devices.