Ultra low-voltage I/O expanders provide remote expansion for most microcontrollers

Mouser now stocks the NXP PCAL6524, an ultra low-voltage I/O expander which provides remote I/O expansion for most microcontrollers using a Fast-mode Plus (Fm+) I2C-bus interface. The PCAL6524 24-bit general purpose I/O expanders have an ultra-low-voltage interface for direct connection to microcontrollers. NXP I/O expanders are a simple solution for when additional I/Os are needed while keeping interconnections to a minimum. This is particularly useful for battery-powered mobile applications for interfacing to sensors, push buttons and keypads, says the company.