The PCAL6524 is a 24-bit general purpose I/O expander that provides remote I/O expansion for most NXP microcontroller families via the Fast-mode Plus (Fm+) I<sup>2</sup>-bus interface.
Ultra Low-Voltage Translating 24-Bit Fm+ I<sup>2</sup>C-Bus/SMBus I/O Expander with Agile I/O Features, Interrupt Output and Reset
The PCAL6524 is a 24-bit general purpose I/O expander that provides remote I/O expansion for most NXP microcontroller families via the Fast-mode Plus (Fm+) I<sup>2</sup>-bus interface.